Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Register map access API |
| 3 | * |
| 4 | * Copyright 2011 Wolfson Microelectronics plc |
| 5 | * |
| 6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
Stephen Warren | f5d6eba | 2012-03-09 13:17:28 -0700 | [diff] [blame] | 13 | #include <linux/device.h> |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 14 | #include <linux/slab.h> |
Paul Gortmaker | 19694b5 | 2012-02-28 19:28:02 -0500 | [diff] [blame] | 15 | #include <linux/export.h> |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 16 | #include <linux/mutex.h> |
| 17 | #include <linux/err.h> |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 18 | #include <linux/of.h> |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 19 | #include <linux/rbtree.h> |
Stephen Warren | 30b2a55 | 2013-02-02 22:50:14 -0700 | [diff] [blame] | 20 | #include <linux/sched.h> |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 21 | #include <linux/delay.h> |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 22 | |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 23 | #define CREATE_TRACE_POINTS |
Steven Rostedt | f58078d | 2015-03-19 17:50:47 -0400 | [diff] [blame] | 24 | #include "trace.h" |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 25 | |
Mark Brown | 93de912 | 2011-07-20 22:35:37 +0100 | [diff] [blame] | 26 | #include "internal.h" |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 27 | |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 28 | /* |
| 29 | * Sometimes for failures during very early init the trace |
| 30 | * infrastructure isn't available early enough to be used. For this |
| 31 | * sort of problem defining LOG_DEVICE will add printks for basic |
| 32 | * register I/O on a specific device. |
| 33 | */ |
| 34 | #undef LOG_DEVICE |
| 35 | |
| 36 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
| 37 | unsigned int mask, unsigned int val, |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 38 | bool *change, bool force_write); |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 39 | |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 40 | static int _regmap_bus_reg_read(void *context, unsigned int reg, |
| 41 | unsigned int *val); |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 42 | static int _regmap_bus_read(void *context, unsigned int reg, |
| 43 | unsigned int *val); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 44 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
| 45 | unsigned int val); |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 46 | static int _regmap_bus_reg_write(void *context, unsigned int reg, |
| 47 | unsigned int val); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 48 | static int _regmap_bus_raw_write(void *context, unsigned int reg, |
| 49 | unsigned int val); |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 50 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 51 | bool regmap_reg_in_ranges(unsigned int reg, |
| 52 | const struct regmap_range *ranges, |
| 53 | unsigned int nranges) |
| 54 | { |
| 55 | const struct regmap_range *r; |
| 56 | int i; |
| 57 | |
| 58 | for (i = 0, r = ranges; i < nranges; i++, r++) |
| 59 | if (regmap_reg_in_range(reg, r)) |
| 60 | return true; |
| 61 | return false; |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(regmap_reg_in_ranges); |
| 64 | |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 65 | bool regmap_check_range_table(struct regmap *map, unsigned int reg, |
| 66 | const struct regmap_access_table *table) |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 67 | { |
| 68 | /* Check "no ranges" first */ |
| 69 | if (regmap_reg_in_ranges(reg, table->no_ranges, table->n_no_ranges)) |
| 70 | return false; |
| 71 | |
| 72 | /* In case zero "yes ranges" are supplied, any reg is OK */ |
| 73 | if (!table->n_yes_ranges) |
| 74 | return true; |
| 75 | |
| 76 | return regmap_reg_in_ranges(reg, table->yes_ranges, |
| 77 | table->n_yes_ranges); |
| 78 | } |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 79 | EXPORT_SYMBOL_GPL(regmap_check_range_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 80 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 81 | bool regmap_writeable(struct regmap *map, unsigned int reg) |
| 82 | { |
| 83 | if (map->max_register && reg > map->max_register) |
| 84 | return false; |
| 85 | |
| 86 | if (map->writeable_reg) |
| 87 | return map->writeable_reg(map->dev, reg); |
| 88 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 89 | if (map->wr_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 90 | return regmap_check_range_table(map, reg, map->wr_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 91 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 92 | return true; |
| 93 | } |
| 94 | |
| 95 | bool regmap_readable(struct regmap *map, unsigned int reg) |
| 96 | { |
Lars-Peter Clausen | 04dc91c | 2015-07-13 12:26:44 +0200 | [diff] [blame] | 97 | if (!map->reg_read) |
| 98 | return false; |
| 99 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 100 | if (map->max_register && reg > map->max_register) |
| 101 | return false; |
| 102 | |
Wolfram Sang | 4191f19 | 2012-01-30 15:08:16 +0100 | [diff] [blame] | 103 | if (map->format.format_write) |
| 104 | return false; |
| 105 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 106 | if (map->readable_reg) |
| 107 | return map->readable_reg(map->dev, reg); |
| 108 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 109 | if (map->rd_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 110 | return regmap_check_range_table(map, reg, map->rd_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 111 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 112 | return true; |
| 113 | } |
| 114 | |
| 115 | bool regmap_volatile(struct regmap *map, unsigned int reg) |
| 116 | { |
Mark Brown | 5844a8b | 2014-08-26 12:12:17 +0100 | [diff] [blame] | 117 | if (!map->format.format_write && !regmap_readable(map, reg)) |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 118 | return false; |
| 119 | |
| 120 | if (map->volatile_reg) |
| 121 | return map->volatile_reg(map->dev, reg); |
| 122 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 123 | if (map->volatile_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 124 | return regmap_check_range_table(map, reg, map->volatile_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 125 | |
Mark Brown | b92be6f | 2013-06-03 17:24:08 +0100 | [diff] [blame] | 126 | if (map->cache_ops) |
| 127 | return false; |
| 128 | else |
| 129 | return true; |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | bool regmap_precious(struct regmap *map, unsigned int reg) |
| 133 | { |
Wolfram Sang | 4191f19 | 2012-01-30 15:08:16 +0100 | [diff] [blame] | 134 | if (!regmap_readable(map, reg)) |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 135 | return false; |
| 136 | |
| 137 | if (map->precious_reg) |
| 138 | return map->precious_reg(map->dev, reg); |
| 139 | |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 140 | if (map->precious_table) |
Mark Brown | 154881e | 2013-05-08 13:55:23 +0100 | [diff] [blame] | 141 | return regmap_check_range_table(map, reg, map->precious_table); |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 142 | |
Mark Brown | 8de2f08 | 2011-08-10 17:14:41 +0900 | [diff] [blame] | 143 | return false; |
| 144 | } |
| 145 | |
Lars-Peter Clausen | 82cd996 | 2011-11-08 18:37:25 +0100 | [diff] [blame] | 146 | static bool regmap_volatile_range(struct regmap *map, unsigned int reg, |
Paul Bolle | a8f28cf | 2012-10-08 22:06:30 +0200 | [diff] [blame] | 147 | size_t num) |
Lars-Peter Clausen | 82cd996 | 2011-11-08 18:37:25 +0100 | [diff] [blame] | 148 | { |
| 149 | unsigned int i; |
| 150 | |
| 151 | for (i = 0; i < num; i++) |
| 152 | if (!regmap_volatile(map, reg + i)) |
| 153 | return false; |
| 154 | |
| 155 | return true; |
| 156 | } |
| 157 | |
Wolfram Sang | 9aa5075 | 2012-01-27 16:10:22 +0100 | [diff] [blame] | 158 | static void regmap_format_2_6_write(struct regmap *map, |
| 159 | unsigned int reg, unsigned int val) |
| 160 | { |
| 161 | u8 *out = map->work_buf; |
| 162 | |
| 163 | *out = (reg << 6) | val; |
| 164 | } |
| 165 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 166 | static void regmap_format_4_12_write(struct regmap *map, |
| 167 | unsigned int reg, unsigned int val) |
| 168 | { |
| 169 | __be16 *out = map->work_buf; |
| 170 | *out = cpu_to_be16((reg << 12) | val); |
| 171 | } |
| 172 | |
| 173 | static void regmap_format_7_9_write(struct regmap *map, |
| 174 | unsigned int reg, unsigned int val) |
| 175 | { |
| 176 | __be16 *out = map->work_buf; |
| 177 | *out = cpu_to_be16((reg << 9) | val); |
| 178 | } |
| 179 | |
Lars-Peter Clausen | 7e5ec63 | 2011-11-16 16:28:21 +0100 | [diff] [blame] | 180 | static void regmap_format_10_14_write(struct regmap *map, |
| 181 | unsigned int reg, unsigned int val) |
| 182 | { |
| 183 | u8 *out = map->work_buf; |
| 184 | |
| 185 | out[2] = val; |
| 186 | out[1] = (val >> 8) | (reg << 6); |
| 187 | out[0] = reg >> 2; |
| 188 | } |
| 189 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 190 | static void regmap_format_8(void *buf, unsigned int val, unsigned int shift) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 191 | { |
| 192 | u8 *b = buf; |
| 193 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 194 | b[0] = val << shift; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 195 | } |
| 196 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 197 | static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 198 | { |
| 199 | __be16 *b = buf; |
| 200 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 201 | b[0] = cpu_to_be16(val << shift); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 202 | } |
| 203 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 204 | static void regmap_format_16_le(void *buf, unsigned int val, unsigned int shift) |
| 205 | { |
| 206 | __le16 *b = buf; |
| 207 | |
| 208 | b[0] = cpu_to_le16(val << shift); |
| 209 | } |
| 210 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 211 | static void regmap_format_16_native(void *buf, unsigned int val, |
| 212 | unsigned int shift) |
| 213 | { |
| 214 | *(u16 *)buf = val << shift; |
| 215 | } |
| 216 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 217 | static void regmap_format_24(void *buf, unsigned int val, unsigned int shift) |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 218 | { |
| 219 | u8 *b = buf; |
| 220 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 221 | val <<= shift; |
| 222 | |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 223 | b[0] = val >> 16; |
| 224 | b[1] = val >> 8; |
| 225 | b[2] = val; |
| 226 | } |
| 227 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 228 | static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift) |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 229 | { |
| 230 | __be32 *b = buf; |
| 231 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 232 | b[0] = cpu_to_be32(val << shift); |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 233 | } |
| 234 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 235 | static void regmap_format_32_le(void *buf, unsigned int val, unsigned int shift) |
| 236 | { |
| 237 | __le32 *b = buf; |
| 238 | |
| 239 | b[0] = cpu_to_le32(val << shift); |
| 240 | } |
| 241 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 242 | static void regmap_format_32_native(void *buf, unsigned int val, |
| 243 | unsigned int shift) |
| 244 | { |
| 245 | *(u32 *)buf = val << shift; |
| 246 | } |
| 247 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 248 | static void regmap_parse_inplace_noop(void *buf) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 249 | { |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | static unsigned int regmap_parse_8(const void *buf) |
| 253 | { |
| 254 | const u8 *b = buf; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 255 | |
| 256 | return b[0]; |
| 257 | } |
| 258 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 259 | static unsigned int regmap_parse_16_be(const void *buf) |
| 260 | { |
| 261 | const __be16 *b = buf; |
| 262 | |
| 263 | return be16_to_cpu(b[0]); |
| 264 | } |
| 265 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 266 | static unsigned int regmap_parse_16_le(const void *buf) |
| 267 | { |
| 268 | const __le16 *b = buf; |
| 269 | |
| 270 | return le16_to_cpu(b[0]); |
| 271 | } |
| 272 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 273 | static void regmap_parse_16_be_inplace(void *buf) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 274 | { |
| 275 | __be16 *b = buf; |
| 276 | |
| 277 | b[0] = be16_to_cpu(b[0]); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 278 | } |
| 279 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 280 | static void regmap_parse_16_le_inplace(void *buf) |
| 281 | { |
| 282 | __le16 *b = buf; |
| 283 | |
| 284 | b[0] = le16_to_cpu(b[0]); |
| 285 | } |
| 286 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 287 | static unsigned int regmap_parse_16_native(const void *buf) |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 288 | { |
| 289 | return *(u16 *)buf; |
| 290 | } |
| 291 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 292 | static unsigned int regmap_parse_24(const void *buf) |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 293 | { |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 294 | const u8 *b = buf; |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 295 | unsigned int ret = b[2]; |
| 296 | ret |= ((unsigned int)b[1]) << 8; |
| 297 | ret |= ((unsigned int)b[0]) << 16; |
| 298 | |
| 299 | return ret; |
| 300 | } |
| 301 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 302 | static unsigned int regmap_parse_32_be(const void *buf) |
| 303 | { |
| 304 | const __be32 *b = buf; |
| 305 | |
| 306 | return be32_to_cpu(b[0]); |
| 307 | } |
| 308 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 309 | static unsigned int regmap_parse_32_le(const void *buf) |
| 310 | { |
| 311 | const __le32 *b = buf; |
| 312 | |
| 313 | return le32_to_cpu(b[0]); |
| 314 | } |
| 315 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 316 | static void regmap_parse_32_be_inplace(void *buf) |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 317 | { |
| 318 | __be32 *b = buf; |
| 319 | |
| 320 | b[0] = be32_to_cpu(b[0]); |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 321 | } |
| 322 | |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 323 | static void regmap_parse_32_le_inplace(void *buf) |
| 324 | { |
| 325 | __le32 *b = buf; |
| 326 | |
| 327 | b[0] = le32_to_cpu(b[0]); |
| 328 | } |
| 329 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 330 | static unsigned int regmap_parse_32_native(const void *buf) |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 331 | { |
| 332 | return *(u32 *)buf; |
| 333 | } |
| 334 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 335 | static void regmap_lock_mutex(void *__map) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 336 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 337 | struct regmap *map = __map; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 338 | mutex_lock(&map->mutex); |
| 339 | } |
| 340 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 341 | static void regmap_unlock_mutex(void *__map) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 342 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 343 | struct regmap *map = __map; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 344 | mutex_unlock(&map->mutex); |
| 345 | } |
| 346 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 347 | static void regmap_lock_spinlock(void *__map) |
Fabio Estevam | b4519c7 | 2013-07-16 02:10:11 -0300 | [diff] [blame] | 348 | __acquires(&map->spinlock) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 349 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 350 | struct regmap *map = __map; |
Lars-Peter Clausen | 92ab1aa | 2013-05-24 10:29:22 +0200 | [diff] [blame] | 351 | unsigned long flags; |
| 352 | |
| 353 | spin_lock_irqsave(&map->spinlock, flags); |
| 354 | map->spinlock_flags = flags; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 355 | } |
| 356 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 357 | static void regmap_unlock_spinlock(void *__map) |
Fabio Estevam | b4519c7 | 2013-07-16 02:10:11 -0300 | [diff] [blame] | 358 | __releases(&map->spinlock) |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 359 | { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 360 | struct regmap *map = __map; |
Lars-Peter Clausen | 92ab1aa | 2013-05-24 10:29:22 +0200 | [diff] [blame] | 361 | spin_unlock_irqrestore(&map->spinlock, map->spinlock_flags); |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 362 | } |
| 363 | |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 364 | static void dev_get_regmap_release(struct device *dev, void *res) |
| 365 | { |
| 366 | /* |
| 367 | * We don't actually have anything to do here; the goal here |
| 368 | * is not to manage the regmap but to provide a simple way to |
| 369 | * get the regmap back given a struct device. |
| 370 | */ |
| 371 | } |
| 372 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 373 | static bool _regmap_range_add(struct regmap *map, |
| 374 | struct regmap_range_node *data) |
| 375 | { |
| 376 | struct rb_root *root = &map->range_tree; |
| 377 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 378 | |
| 379 | while (*new) { |
| 380 | struct regmap_range_node *this = |
| 381 | container_of(*new, struct regmap_range_node, node); |
| 382 | |
| 383 | parent = *new; |
| 384 | if (data->range_max < this->range_min) |
| 385 | new = &((*new)->rb_left); |
| 386 | else if (data->range_min > this->range_max) |
| 387 | new = &((*new)->rb_right); |
| 388 | else |
| 389 | return false; |
| 390 | } |
| 391 | |
| 392 | rb_link_node(&data->node, parent, new); |
| 393 | rb_insert_color(&data->node, root); |
| 394 | |
| 395 | return true; |
| 396 | } |
| 397 | |
| 398 | static struct regmap_range_node *_regmap_range_lookup(struct regmap *map, |
| 399 | unsigned int reg) |
| 400 | { |
| 401 | struct rb_node *node = map->range_tree.rb_node; |
| 402 | |
| 403 | while (node) { |
| 404 | struct regmap_range_node *this = |
| 405 | container_of(node, struct regmap_range_node, node); |
| 406 | |
| 407 | if (reg < this->range_min) |
| 408 | node = node->rb_left; |
| 409 | else if (reg > this->range_max) |
| 410 | node = node->rb_right; |
| 411 | else |
| 412 | return this; |
| 413 | } |
| 414 | |
| 415 | return NULL; |
| 416 | } |
| 417 | |
| 418 | static void regmap_range_exit(struct regmap *map) |
| 419 | { |
| 420 | struct rb_node *next; |
| 421 | struct regmap_range_node *range_node; |
| 422 | |
| 423 | next = rb_first(&map->range_tree); |
| 424 | while (next) { |
| 425 | range_node = rb_entry(next, struct regmap_range_node, node); |
| 426 | next = rb_next(&range_node->node); |
| 427 | rb_erase(&range_node->node, &map->range_tree); |
| 428 | kfree(range_node); |
| 429 | } |
| 430 | |
| 431 | kfree(map->selector_work_buf); |
| 432 | } |
| 433 | |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 434 | int regmap_attach_dev(struct device *dev, struct regmap *map, |
| 435 | const struct regmap_config *config) |
| 436 | { |
| 437 | struct regmap **m; |
| 438 | |
| 439 | map->dev = dev; |
| 440 | |
| 441 | regmap_debugfs_init(map, config->name); |
| 442 | |
| 443 | /* Add a devres resource for dev_get_regmap() */ |
| 444 | m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); |
| 445 | if (!m) { |
| 446 | regmap_debugfs_exit(map); |
| 447 | return -ENOMEM; |
| 448 | } |
| 449 | *m = map; |
| 450 | devres_add(dev, m); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | EXPORT_SYMBOL_GPL(regmap_attach_dev); |
| 455 | |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 456 | static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus, |
| 457 | const struct regmap_config *config) |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 458 | { |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 459 | enum regmap_endian endian; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 460 | |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 461 | /* Retrieve the endianness specification from the regmap config */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 462 | endian = config->reg_format_endian; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 463 | |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 464 | /* If the regmap config specified a non-default value, use that */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 465 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 466 | return endian; |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 467 | |
| 468 | /* Retrieve the endianness specification from the bus config */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 469 | if (bus && bus->reg_format_endian_default) |
| 470 | endian = bus->reg_format_endian_default; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 471 | |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 472 | /* If the bus specified a non-default value, use that */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 473 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 474 | return endian; |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 475 | |
| 476 | /* Use this if no other value was found */ |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 477 | return REGMAP_ENDIAN_BIG; |
| 478 | } |
Stephen Warren | 45e1a27 | 2014-08-19 10:49:07 -0600 | [diff] [blame] | 479 | |
Guenter Roeck | 3c174d2 | 2015-02-03 10:01:18 -0800 | [diff] [blame] | 480 | enum regmap_endian regmap_get_val_endian(struct device *dev, |
| 481 | const struct regmap_bus *bus, |
| 482 | const struct regmap_config *config) |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 483 | { |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 484 | struct device_node *np; |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 485 | enum regmap_endian endian; |
| 486 | |
| 487 | /* Retrieve the endianness specification from the regmap config */ |
| 488 | endian = config->val_format_endian; |
| 489 | |
| 490 | /* If the regmap config specified a non-default value, use that */ |
| 491 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 492 | return endian; |
| 493 | |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 494 | /* If the dev and dev->of_node exist try to get endianness from DT */ |
| 495 | if (dev && dev->of_node) { |
| 496 | np = dev->of_node; |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 497 | |
Pankaj Dubey | 6e64b6c | 2014-09-18 15:12:20 +0530 | [diff] [blame] | 498 | /* Parse the device's DT node for an endianness specification */ |
| 499 | if (of_property_read_bool(np, "big-endian")) |
| 500 | endian = REGMAP_ENDIAN_BIG; |
| 501 | else if (of_property_read_bool(np, "little-endian")) |
| 502 | endian = REGMAP_ENDIAN_LITTLE; |
| 503 | |
| 504 | /* If the endianness was specified in DT, use that */ |
| 505 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 506 | return endian; |
| 507 | } |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 508 | |
| 509 | /* Retrieve the endianness specification from the bus config */ |
| 510 | if (bus && bus->val_format_endian_default) |
| 511 | endian = bus->val_format_endian_default; |
| 512 | |
| 513 | /* If the bus specified a non-default value, use that */ |
| 514 | if (endian != REGMAP_ENDIAN_DEFAULT) |
| 515 | return endian; |
| 516 | |
| 517 | /* Use this if no other value was found */ |
| 518 | return REGMAP_ENDIAN_BIG; |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 519 | } |
Guenter Roeck | 3c174d2 | 2015-02-03 10:01:18 -0800 | [diff] [blame] | 520 | EXPORT_SYMBOL_GPL(regmap_get_val_endian); |
Xiubo Li | d647c19 | 2014-07-15 12:23:02 +0800 | [diff] [blame] | 521 | |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 522 | struct regmap *__regmap_init(struct device *dev, |
| 523 | const struct regmap_bus *bus, |
| 524 | void *bus_context, |
| 525 | const struct regmap_config *config, |
| 526 | struct lock_class_key *lock_key, |
| 527 | const char *lock_name) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 528 | { |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 529 | struct regmap *map; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 530 | int ret = -EINVAL; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 531 | enum regmap_endian reg_endian, val_endian; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 532 | int i, j; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 533 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 534 | if (!config) |
Lars-Peter Clausen | abbb18f | 2011-11-14 10:40:15 +0100 | [diff] [blame] | 535 | goto err; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 536 | |
| 537 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 538 | if (map == NULL) { |
| 539 | ret = -ENOMEM; |
| 540 | goto err; |
| 541 | } |
| 542 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 543 | if (config->lock && config->unlock) { |
| 544 | map->lock = config->lock; |
| 545 | map->unlock = config->unlock; |
| 546 | map->lock_arg = config->lock_arg; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 547 | } else { |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 548 | if ((bus && bus->fast_io) || |
| 549 | config->fast_io) { |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 550 | spin_lock_init(&map->spinlock); |
| 551 | map->lock = regmap_lock_spinlock; |
| 552 | map->unlock = regmap_unlock_spinlock; |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 553 | lockdep_set_class_and_name(&map->spinlock, |
| 554 | lock_key, lock_name); |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 555 | } else { |
| 556 | mutex_init(&map->mutex); |
| 557 | map->lock = regmap_lock_mutex; |
| 558 | map->unlock = regmap_unlock_mutex; |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 559 | lockdep_set_class_and_name(&map->mutex, |
| 560 | lock_key, lock_name); |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 561 | } |
| 562 | map->lock_arg = map; |
Stephen Warren | bacdbe0 | 2012-04-04 15:48:28 -0600 | [diff] [blame] | 563 | } |
Wolfram Sang | c212acc | 2012-01-28 02:16:41 +0100 | [diff] [blame] | 564 | map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 565 | map->format.pad_bytes = config->pad_bits / 8; |
Wolfram Sang | c212acc | 2012-01-28 02:16:41 +0100 | [diff] [blame] | 566 | map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); |
Fabio Estevam | 5494a98 | 2012-05-31 21:10:30 -0300 | [diff] [blame] | 567 | map->format.buf_size = DIV_ROUND_UP(config->reg_bits + |
| 568 | config->val_bits + config->pad_bits, 8); |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 569 | map->reg_shift = config->pad_bits % 8; |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 570 | if (config->reg_stride) |
| 571 | map->reg_stride = config->reg_stride; |
| 572 | else |
| 573 | map->reg_stride = 1; |
Markus Pargmann | 67921a1 | 2015-08-21 10:26:42 +0200 | [diff] [blame] | 574 | map->use_single_read = config->use_single_rw || !bus || !bus->read; |
| 575 | map->use_single_write = config->use_single_rw || !bus || !bus->write; |
Markus Pargmann | 9c9f7f6 | 2015-08-21 10:26:43 +0200 | [diff] [blame] | 576 | map->can_multi_write = config->can_multi_write && bus && bus->write; |
Sergey SENOZHATSKY | 17649c9 | 2015-08-31 18:54:58 +0900 | [diff] [blame] | 577 | if (bus) { |
| 578 | map->max_raw_read = bus->max_raw_read; |
| 579 | map->max_raw_write = bus->max_raw_write; |
| 580 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 581 | map->dev = dev; |
| 582 | map->bus = bus; |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 583 | map->bus_context = bus_context; |
Mark Brown | 2e2ae66 | 2011-07-20 22:33:39 +0100 | [diff] [blame] | 584 | map->max_register = config->max_register; |
Davide Ciminaghi | 76aad39 | 2012-11-20 15:20:30 +0100 | [diff] [blame] | 585 | map->wr_table = config->wr_table; |
| 586 | map->rd_table = config->rd_table; |
| 587 | map->volatile_table = config->volatile_table; |
| 588 | map->precious_table = config->precious_table; |
Mark Brown | 2e2ae66 | 2011-07-20 22:33:39 +0100 | [diff] [blame] | 589 | map->writeable_reg = config->writeable_reg; |
| 590 | map->readable_reg = config->readable_reg; |
| 591 | map->volatile_reg = config->volatile_reg; |
Mark Brown | 2efe164 | 2011-08-08 15:41:46 +0900 | [diff] [blame] | 592 | map->precious_reg = config->precious_reg; |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 593 | map->cache_type = config->cache_type; |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 594 | map->name = config->name; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 595 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 596 | spin_lock_init(&map->async_lock); |
| 597 | INIT_LIST_HEAD(&map->async_list); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 598 | INIT_LIST_HEAD(&map->async_free); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 599 | init_waitqueue_head(&map->async_waitq); |
| 600 | |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 601 | if (config->read_flag_mask || config->write_flag_mask) { |
| 602 | map->read_flag_mask = config->read_flag_mask; |
| 603 | map->write_flag_mask = config->write_flag_mask; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 604 | } else if (bus) { |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 605 | map->read_flag_mask = bus->read_flag_mask; |
| 606 | } |
| 607 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 608 | if (!bus) { |
| 609 | map->reg_read = config->reg_read; |
| 610 | map->reg_write = config->reg_write; |
| 611 | |
| 612 | map->defer_caching = false; |
| 613 | goto skip_format_initialization; |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 614 | } else if (!bus->read || !bus->write) { |
| 615 | map->reg_read = _regmap_bus_reg_read; |
| 616 | map->reg_write = _regmap_bus_reg_write; |
| 617 | |
| 618 | map->defer_caching = false; |
| 619 | goto skip_format_initialization; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 620 | } else { |
| 621 | map->reg_read = _regmap_bus_read; |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame^] | 622 | map->reg_update_bits = bus->reg_update_bits; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 623 | } |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 624 | |
Geert Uytterhoeven | cf673fb | 2014-08-27 16:36:03 +0200 | [diff] [blame] | 625 | reg_endian = regmap_get_reg_endian(bus, config); |
| 626 | val_endian = regmap_get_val_endian(dev, bus, config); |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 627 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 628 | switch (config->reg_bits + map->reg_shift) { |
Wolfram Sang | 9aa5075 | 2012-01-27 16:10:22 +0100 | [diff] [blame] | 629 | case 2: |
| 630 | switch (config->val_bits) { |
| 631 | case 6: |
| 632 | map->format.format_write = regmap_format_2_6_write; |
| 633 | break; |
| 634 | default: |
| 635 | goto err_map; |
| 636 | } |
| 637 | break; |
| 638 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 639 | case 4: |
| 640 | switch (config->val_bits) { |
| 641 | case 12: |
| 642 | map->format.format_write = regmap_format_4_12_write; |
| 643 | break; |
| 644 | default: |
| 645 | goto err_map; |
| 646 | } |
| 647 | break; |
| 648 | |
| 649 | case 7: |
| 650 | switch (config->val_bits) { |
| 651 | case 9: |
| 652 | map->format.format_write = regmap_format_7_9_write; |
| 653 | break; |
| 654 | default: |
| 655 | goto err_map; |
| 656 | } |
| 657 | break; |
| 658 | |
Lars-Peter Clausen | 7e5ec63 | 2011-11-16 16:28:21 +0100 | [diff] [blame] | 659 | case 10: |
| 660 | switch (config->val_bits) { |
| 661 | case 14: |
| 662 | map->format.format_write = regmap_format_10_14_write; |
| 663 | break; |
| 664 | default: |
| 665 | goto err_map; |
| 666 | } |
| 667 | break; |
| 668 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 669 | case 8: |
| 670 | map->format.format_reg = regmap_format_8; |
| 671 | break; |
| 672 | |
| 673 | case 16: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 674 | switch (reg_endian) { |
| 675 | case REGMAP_ENDIAN_BIG: |
| 676 | map->format.format_reg = regmap_format_16_be; |
| 677 | break; |
| 678 | case REGMAP_ENDIAN_NATIVE: |
| 679 | map->format.format_reg = regmap_format_16_native; |
| 680 | break; |
| 681 | default: |
| 682 | goto err_map; |
| 683 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 684 | break; |
| 685 | |
Lars-Peter Clausen | 237019e | 2013-01-10 17:06:10 +0100 | [diff] [blame] | 686 | case 24: |
| 687 | if (reg_endian != REGMAP_ENDIAN_BIG) |
| 688 | goto err_map; |
| 689 | map->format.format_reg = regmap_format_24; |
| 690 | break; |
| 691 | |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 692 | case 32: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 693 | switch (reg_endian) { |
| 694 | case REGMAP_ENDIAN_BIG: |
| 695 | map->format.format_reg = regmap_format_32_be; |
| 696 | break; |
| 697 | case REGMAP_ENDIAN_NATIVE: |
| 698 | map->format.format_reg = regmap_format_32_native; |
| 699 | break; |
| 700 | default: |
| 701 | goto err_map; |
| 702 | } |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 703 | break; |
| 704 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 705 | default: |
| 706 | goto err_map; |
| 707 | } |
| 708 | |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 709 | if (val_endian == REGMAP_ENDIAN_NATIVE) |
| 710 | map->format.parse_inplace = regmap_parse_inplace_noop; |
| 711 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 712 | switch (config->val_bits) { |
| 713 | case 8: |
| 714 | map->format.format_val = regmap_format_8; |
| 715 | map->format.parse_val = regmap_parse_8; |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 716 | map->format.parse_inplace = regmap_parse_inplace_noop; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 717 | break; |
| 718 | case 16: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 719 | switch (val_endian) { |
| 720 | case REGMAP_ENDIAN_BIG: |
| 721 | map->format.format_val = regmap_format_16_be; |
| 722 | map->format.parse_val = regmap_parse_16_be; |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 723 | map->format.parse_inplace = regmap_parse_16_be_inplace; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 724 | break; |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 725 | case REGMAP_ENDIAN_LITTLE: |
| 726 | map->format.format_val = regmap_format_16_le; |
| 727 | map->format.parse_val = regmap_parse_16_le; |
| 728 | map->format.parse_inplace = regmap_parse_16_le_inplace; |
| 729 | break; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 730 | case REGMAP_ENDIAN_NATIVE: |
| 731 | map->format.format_val = regmap_format_16_native; |
| 732 | map->format.parse_val = regmap_parse_16_native; |
| 733 | break; |
| 734 | default: |
| 735 | goto err_map; |
| 736 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 737 | break; |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 738 | case 24: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 739 | if (val_endian != REGMAP_ENDIAN_BIG) |
| 740 | goto err_map; |
Marc Reilly | ea279fc | 2012-03-16 12:11:42 +1100 | [diff] [blame] | 741 | map->format.format_val = regmap_format_24; |
| 742 | map->format.parse_val = regmap_parse_24; |
| 743 | break; |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 744 | case 32: |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 745 | switch (val_endian) { |
| 746 | case REGMAP_ENDIAN_BIG: |
| 747 | map->format.format_val = regmap_format_32_be; |
| 748 | map->format.parse_val = regmap_parse_32_be; |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 749 | map->format.parse_inplace = regmap_parse_32_be_inplace; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 750 | break; |
Xiubo Li | 4aa8c06 | 2014-04-02 18:09:07 +0800 | [diff] [blame] | 751 | case REGMAP_ENDIAN_LITTLE: |
| 752 | map->format.format_val = regmap_format_32_le; |
| 753 | map->format.parse_val = regmap_parse_32_le; |
| 754 | map->format.parse_inplace = regmap_parse_32_le_inplace; |
| 755 | break; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 756 | case REGMAP_ENDIAN_NATIVE: |
| 757 | map->format.format_val = regmap_format_32_native; |
| 758 | map->format.parse_val = regmap_parse_32_native; |
| 759 | break; |
| 760 | default: |
| 761 | goto err_map; |
| 762 | } |
Mark Brown | 7d5e525 | 2012-02-17 15:58:25 -0800 | [diff] [blame] | 763 | break; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 764 | } |
| 765 | |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 766 | if (map->format.format_write) { |
| 767 | if ((reg_endian != REGMAP_ENDIAN_BIG) || |
| 768 | (val_endian != REGMAP_ENDIAN_BIG)) |
| 769 | goto err_map; |
Markus Pargmann | 67921a1 | 2015-08-21 10:26:42 +0200 | [diff] [blame] | 770 | map->use_single_write = true; |
Stephen Warren | 141eba2 | 2012-05-24 10:47:26 -0600 | [diff] [blame] | 771 | } |
Mark Brown | 7a64761 | 2012-04-30 23:26:32 +0100 | [diff] [blame] | 772 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 773 | if (!map->format.format_write && |
| 774 | !(map->format.format_reg && map->format.format_val)) |
| 775 | goto err_map; |
| 776 | |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 777 | map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 778 | if (map->work_buf == NULL) { |
| 779 | ret = -ENOMEM; |
Mark Brown | 5204f5e | 2011-09-05 08:07:47 -0700 | [diff] [blame] | 780 | goto err_map; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 781 | } |
| 782 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 783 | if (map->format.format_write) { |
| 784 | map->defer_caching = false; |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 785 | map->reg_write = _regmap_bus_formatted_write; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 786 | } else if (map->format.format_val) { |
| 787 | map->defer_caching = true; |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 788 | map->reg_write = _regmap_bus_raw_write; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | skip_format_initialization: |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 792 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 793 | map->range_tree = RB_ROOT; |
Mark Brown | e3549cd | 2012-10-02 20:17:15 +0100 | [diff] [blame] | 794 | for (i = 0; i < config->num_ranges; i++) { |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 795 | const struct regmap_range_cfg *range_cfg = &config->ranges[i]; |
| 796 | struct regmap_range_node *new; |
| 797 | |
| 798 | /* Sanity check */ |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 799 | if (range_cfg->range_max < range_cfg->range_min) { |
| 800 | dev_err(map->dev, "Invalid range %d: %d < %d\n", i, |
| 801 | range_cfg->range_max, range_cfg->range_min); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 802 | goto err_range; |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 803 | } |
| 804 | |
| 805 | if (range_cfg->range_max > map->max_register) { |
| 806 | dev_err(map->dev, "Invalid range %d: %d > %d\n", i, |
| 807 | range_cfg->range_max, map->max_register); |
| 808 | goto err_range; |
| 809 | } |
| 810 | |
| 811 | if (range_cfg->selector_reg > map->max_register) { |
| 812 | dev_err(map->dev, |
| 813 | "Invalid range %d: selector out of map\n", i); |
| 814 | goto err_range; |
| 815 | } |
| 816 | |
| 817 | if (range_cfg->window_len == 0) { |
| 818 | dev_err(map->dev, "Invalid range %d: window_len 0\n", |
| 819 | i); |
| 820 | goto err_range; |
| 821 | } |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 822 | |
| 823 | /* Make sure, that this register range has no selector |
| 824 | or data window within its boundary */ |
Mark Brown | e3549cd | 2012-10-02 20:17:15 +0100 | [diff] [blame] | 825 | for (j = 0; j < config->num_ranges; j++) { |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 826 | unsigned sel_reg = config->ranges[j].selector_reg; |
| 827 | unsigned win_min = config->ranges[j].window_start; |
| 828 | unsigned win_max = win_min + |
| 829 | config->ranges[j].window_len - 1; |
| 830 | |
Philipp Zabel | f161d22 | 2013-07-23 12:16:02 +0200 | [diff] [blame] | 831 | /* Allow data window inside its own virtual range */ |
| 832 | if (j == i) |
| 833 | continue; |
| 834 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 835 | if (range_cfg->range_min <= sel_reg && |
| 836 | sel_reg <= range_cfg->range_max) { |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 837 | dev_err(map->dev, |
| 838 | "Range %d: selector for %d in window\n", |
| 839 | i, j); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 840 | goto err_range; |
| 841 | } |
| 842 | |
| 843 | if (!(win_max < range_cfg->range_min || |
| 844 | win_min > range_cfg->range_max)) { |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 845 | dev_err(map->dev, |
| 846 | "Range %d: window for %d in window\n", |
| 847 | i, j); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 848 | goto err_range; |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
| 853 | if (new == NULL) { |
| 854 | ret = -ENOMEM; |
| 855 | goto err_range; |
| 856 | } |
| 857 | |
Mark Brown | 4b020b3 | 2012-10-03 13:13:16 +0100 | [diff] [blame] | 858 | new->map = map; |
Mark Brown | d058bb4 | 2012-10-03 12:40:47 +0100 | [diff] [blame] | 859 | new->name = range_cfg->name; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 860 | new->range_min = range_cfg->range_min; |
| 861 | new->range_max = range_cfg->range_max; |
| 862 | new->selector_reg = range_cfg->selector_reg; |
| 863 | new->selector_mask = range_cfg->selector_mask; |
| 864 | new->selector_shift = range_cfg->selector_shift; |
| 865 | new->window_start = range_cfg->window_start; |
| 866 | new->window_len = range_cfg->window_len; |
| 867 | |
Nenghua Cao | 53e87f8 | 2014-02-21 16:05:45 +0800 | [diff] [blame] | 868 | if (!_regmap_range_add(map, new)) { |
Mark Brown | 061adc0 | 2012-10-03 12:17:51 +0100 | [diff] [blame] | 869 | dev_err(map->dev, "Failed to add range %d\n", i); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 870 | kfree(new); |
| 871 | goto err_range; |
| 872 | } |
| 873 | |
| 874 | if (map->selector_work_buf == NULL) { |
| 875 | map->selector_work_buf = |
| 876 | kzalloc(map->format.buf_size, GFP_KERNEL); |
| 877 | if (map->selector_work_buf == NULL) { |
| 878 | ret = -ENOMEM; |
| 879 | goto err_range; |
| 880 | } |
| 881 | } |
| 882 | } |
Mark Brown | 052d2cd | 2011-11-21 19:05:13 +0000 | [diff] [blame] | 883 | |
Lars-Peter Clausen | e5e3b8a | 2011-11-16 16:28:16 +0100 | [diff] [blame] | 884 | ret = regcache_init(map, config); |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 885 | if (ret != 0) |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 886 | goto err_range; |
| 887 | |
Daeseok Youn | a7a037c | 2014-04-01 19:46:43 +0900 | [diff] [blame] | 888 | if (dev) { |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 889 | ret = regmap_attach_dev(dev, map, config); |
| 890 | if (ret != 0) |
| 891 | goto err_regcache; |
Daeseok Youn | a7a037c | 2014-04-01 19:46:43 +0900 | [diff] [blame] | 892 | } |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 893 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 894 | return map; |
| 895 | |
Michal Simek | 6cfec04 | 2014-02-10 16:22:33 +0100 | [diff] [blame] | 896 | err_regcache: |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 897 | regcache_exit(map); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 898 | err_range: |
| 899 | regmap_range_exit(map); |
Lars-Peter Clausen | 58072cb | 2011-11-10 18:15:15 +0100 | [diff] [blame] | 900 | kfree(map->work_buf); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 901 | err_map: |
| 902 | kfree(map); |
| 903 | err: |
| 904 | return ERR_PTR(ret); |
| 905 | } |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 906 | EXPORT_SYMBOL_GPL(__regmap_init); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 907 | |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 908 | static void devm_regmap_release(struct device *dev, void *res) |
| 909 | { |
| 910 | regmap_exit(*(struct regmap **)res); |
| 911 | } |
| 912 | |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 913 | struct regmap *__devm_regmap_init(struct device *dev, |
| 914 | const struct regmap_bus *bus, |
| 915 | void *bus_context, |
| 916 | const struct regmap_config *config, |
| 917 | struct lock_class_key *lock_key, |
| 918 | const char *lock_name) |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 919 | { |
| 920 | struct regmap **ptr, *regmap; |
| 921 | |
| 922 | ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); |
| 923 | if (!ptr) |
| 924 | return ERR_PTR(-ENOMEM); |
| 925 | |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 926 | regmap = __regmap_init(dev, bus, bus_context, config, |
| 927 | lock_key, lock_name); |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 928 | if (!IS_ERR(regmap)) { |
| 929 | *ptr = regmap; |
| 930 | devres_add(dev, ptr); |
| 931 | } else { |
| 932 | devres_free(ptr); |
| 933 | } |
| 934 | |
| 935 | return regmap; |
| 936 | } |
Nicolas Boichat | 3cfe7a7 | 2015-07-08 14:30:18 +0800 | [diff] [blame] | 937 | EXPORT_SYMBOL_GPL(__devm_regmap_init); |
Mark Brown | c0eb467 | 2012-01-30 19:56:52 +0000 | [diff] [blame] | 938 | |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 939 | static void regmap_field_init(struct regmap_field *rm_field, |
| 940 | struct regmap *regmap, struct reg_field reg_field) |
| 941 | { |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 942 | rm_field->regmap = regmap; |
| 943 | rm_field->reg = reg_field.reg; |
| 944 | rm_field->shift = reg_field.lsb; |
Maxime Coquelin | 921cc29 | 2015-06-16 13:53:19 +0200 | [diff] [blame] | 945 | rm_field->mask = GENMASK(reg_field.msb, reg_field.lsb); |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 946 | rm_field->id_size = reg_field.id_size; |
| 947 | rm_field->id_offset = reg_field.id_offset; |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | /** |
| 951 | * devm_regmap_field_alloc(): Allocate and initialise a register field |
| 952 | * in a register map. |
| 953 | * |
| 954 | * @dev: Device that will be interacted with |
| 955 | * @regmap: regmap bank in which this register field is located. |
| 956 | * @reg_field: Register field with in the bank. |
| 957 | * |
| 958 | * The return value will be an ERR_PTR() on error or a valid pointer |
| 959 | * to a struct regmap_field. The regmap_field will be automatically freed |
| 960 | * by the device management code. |
| 961 | */ |
| 962 | struct regmap_field *devm_regmap_field_alloc(struct device *dev, |
| 963 | struct regmap *regmap, struct reg_field reg_field) |
| 964 | { |
| 965 | struct regmap_field *rm_field = devm_kzalloc(dev, |
| 966 | sizeof(*rm_field), GFP_KERNEL); |
| 967 | if (!rm_field) |
| 968 | return ERR_PTR(-ENOMEM); |
| 969 | |
| 970 | regmap_field_init(rm_field, regmap, reg_field); |
| 971 | |
| 972 | return rm_field; |
| 973 | |
| 974 | } |
| 975 | EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); |
| 976 | |
| 977 | /** |
| 978 | * devm_regmap_field_free(): Free register field allocated using |
| 979 | * devm_regmap_field_alloc. Usally drivers need not call this function, |
| 980 | * as the memory allocated via devm will be freed as per device-driver |
| 981 | * life-cyle. |
| 982 | * |
| 983 | * @dev: Device that will be interacted with |
| 984 | * @field: regmap field which should be freed. |
| 985 | */ |
| 986 | void devm_regmap_field_free(struct device *dev, |
| 987 | struct regmap_field *field) |
| 988 | { |
| 989 | devm_kfree(dev, field); |
| 990 | } |
| 991 | EXPORT_SYMBOL_GPL(devm_regmap_field_free); |
| 992 | |
| 993 | /** |
| 994 | * regmap_field_alloc(): Allocate and initialise a register field |
| 995 | * in a register map. |
| 996 | * |
| 997 | * @regmap: regmap bank in which this register field is located. |
| 998 | * @reg_field: Register field with in the bank. |
| 999 | * |
| 1000 | * The return value will be an ERR_PTR() on error or a valid pointer |
| 1001 | * to a struct regmap_field. The regmap_field should be freed by the |
| 1002 | * user once its finished working with it using regmap_field_free(). |
| 1003 | */ |
| 1004 | struct regmap_field *regmap_field_alloc(struct regmap *regmap, |
| 1005 | struct reg_field reg_field) |
| 1006 | { |
| 1007 | struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); |
| 1008 | |
| 1009 | if (!rm_field) |
| 1010 | return ERR_PTR(-ENOMEM); |
| 1011 | |
| 1012 | regmap_field_init(rm_field, regmap, reg_field); |
| 1013 | |
| 1014 | return rm_field; |
| 1015 | } |
| 1016 | EXPORT_SYMBOL_GPL(regmap_field_alloc); |
| 1017 | |
| 1018 | /** |
| 1019 | * regmap_field_free(): Free register field allocated using regmap_field_alloc |
| 1020 | * |
| 1021 | * @field: regmap field which should be freed. |
| 1022 | */ |
| 1023 | void regmap_field_free(struct regmap_field *field) |
| 1024 | { |
| 1025 | kfree(field); |
| 1026 | } |
| 1027 | EXPORT_SYMBOL_GPL(regmap_field_free); |
| 1028 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1029 | /** |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1030 | * regmap_reinit_cache(): Reinitialise the current register cache |
| 1031 | * |
| 1032 | * @map: Register map to operate on. |
| 1033 | * @config: New configuration. Only the cache data will be used. |
| 1034 | * |
| 1035 | * Discard any existing register cache for the map and initialize a |
| 1036 | * new cache. This can be used to restore the cache to defaults or to |
| 1037 | * update the cache configuration to reflect runtime discovery of the |
| 1038 | * hardware. |
Dimitris Papastamos | 4d87951 | 2012-07-27 14:54:15 +0100 | [diff] [blame] | 1039 | * |
| 1040 | * No explicit locking is done here, the user needs to ensure that |
| 1041 | * this function will not race with other calls to regmap. |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1042 | */ |
| 1043 | int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) |
| 1044 | { |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1045 | regcache_exit(map); |
Mark Brown | a24f64a | 2012-01-26 18:30:16 +0000 | [diff] [blame] | 1046 | regmap_debugfs_exit(map); |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1047 | |
| 1048 | map->max_register = config->max_register; |
| 1049 | map->writeable_reg = config->writeable_reg; |
| 1050 | map->readable_reg = config->readable_reg; |
| 1051 | map->volatile_reg = config->volatile_reg; |
| 1052 | map->precious_reg = config->precious_reg; |
| 1053 | map->cache_type = config->cache_type; |
| 1054 | |
Stephen Warren | d3c242e | 2012-04-04 15:48:29 -0600 | [diff] [blame] | 1055 | regmap_debugfs_init(map, config->name); |
Mark Brown | a24f64a | 2012-01-26 18:30:16 +0000 | [diff] [blame] | 1056 | |
Mark Brown | 421e8d2 | 2012-01-20 13:39:37 +0000 | [diff] [blame] | 1057 | map->cache_bypass = false; |
| 1058 | map->cache_only = false; |
| 1059 | |
Dimitris Papastamos | 4d87951 | 2012-07-27 14:54:15 +0100 | [diff] [blame] | 1060 | return regcache_init(map, config); |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1061 | } |
Mark Brown | 752a6a5 | 2012-05-14 10:00:12 +0100 | [diff] [blame] | 1062 | EXPORT_SYMBOL_GPL(regmap_reinit_cache); |
Mark Brown | bf31517 | 2011-12-03 17:06:20 +0000 | [diff] [blame] | 1063 | |
| 1064 | /** |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1065 | * regmap_exit(): Free a previously allocated register map |
| 1066 | */ |
| 1067 | void regmap_exit(struct regmap *map) |
| 1068 | { |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1069 | struct regmap_async *async; |
| 1070 | |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1071 | regcache_exit(map); |
Mark Brown | 31244e3 | 2011-07-20 22:56:53 +0100 | [diff] [blame] | 1072 | regmap_debugfs_exit(map); |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1073 | regmap_range_exit(map); |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1074 | if (map->bus && map->bus->free_context) |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1075 | map->bus->free_context(map->bus_context); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1076 | kfree(map->work_buf); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1077 | while (!list_empty(&map->async_free)) { |
| 1078 | async = list_first_entry_or_null(&map->async_free, |
| 1079 | struct regmap_async, |
| 1080 | list); |
| 1081 | list_del(&async->list); |
| 1082 | kfree(async->work_buf); |
| 1083 | kfree(async); |
| 1084 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1085 | kfree(map); |
| 1086 | } |
| 1087 | EXPORT_SYMBOL_GPL(regmap_exit); |
| 1088 | |
Mark Brown | 72b39f6 | 2012-05-08 17:44:40 +0100 | [diff] [blame] | 1089 | static int dev_get_regmap_match(struct device *dev, void *res, void *data) |
| 1090 | { |
| 1091 | struct regmap **r = res; |
| 1092 | if (!r || !*r) { |
| 1093 | WARN_ON(!r || !*r); |
| 1094 | return 0; |
| 1095 | } |
| 1096 | |
| 1097 | /* If the user didn't specify a name match any */ |
| 1098 | if (data) |
| 1099 | return (*r)->name == data; |
| 1100 | else |
| 1101 | return 1; |
| 1102 | } |
| 1103 | |
| 1104 | /** |
| 1105 | * dev_get_regmap(): Obtain the regmap (if any) for a device |
| 1106 | * |
| 1107 | * @dev: Device to retrieve the map for |
| 1108 | * @name: Optional name for the register map, usually NULL. |
| 1109 | * |
| 1110 | * Returns the regmap for the device if one is present, or NULL. If |
| 1111 | * name is specified then it must match the name specified when |
| 1112 | * registering the device, if it is NULL then the first regmap found |
| 1113 | * will be used. Devices with multiple register maps are very rare, |
| 1114 | * generic code should normally not need to specify a name. |
| 1115 | */ |
| 1116 | struct regmap *dev_get_regmap(struct device *dev, const char *name) |
| 1117 | { |
| 1118 | struct regmap **r = devres_find(dev, dev_get_regmap_release, |
| 1119 | dev_get_regmap_match, (void *)name); |
| 1120 | |
| 1121 | if (!r) |
| 1122 | return NULL; |
| 1123 | return *r; |
| 1124 | } |
| 1125 | EXPORT_SYMBOL_GPL(dev_get_regmap); |
| 1126 | |
Tuomas Tynkkynen | 8d7d397 | 2014-07-21 18:38:47 +0300 | [diff] [blame] | 1127 | /** |
| 1128 | * regmap_get_device(): Obtain the device from a regmap |
| 1129 | * |
| 1130 | * @map: Register map to operate on. |
| 1131 | * |
| 1132 | * Returns the underlying device that the regmap has been created for. |
| 1133 | */ |
| 1134 | struct device *regmap_get_device(struct regmap *map) |
| 1135 | { |
| 1136 | return map->dev; |
| 1137 | } |
Mark Brown | fa2fbe4 | 2014-07-25 18:30:31 +0100 | [diff] [blame] | 1138 | EXPORT_SYMBOL_GPL(regmap_get_device); |
Tuomas Tynkkynen | 8d7d397 | 2014-07-21 18:38:47 +0300 | [diff] [blame] | 1139 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1140 | static int _regmap_select_page(struct regmap *map, unsigned int *reg, |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1141 | struct regmap_range_node *range, |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1142 | unsigned int val_num) |
| 1143 | { |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1144 | void *orig_work_buf; |
| 1145 | unsigned int win_offset; |
| 1146 | unsigned int win_page; |
| 1147 | bool page_chg; |
| 1148 | int ret; |
| 1149 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1150 | win_offset = (*reg - range->range_min) % range->window_len; |
| 1151 | win_page = (*reg - range->range_min) / range->window_len; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1152 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1153 | if (val_num > 1) { |
| 1154 | /* Bulk write shouldn't cross range boundary */ |
| 1155 | if (*reg + val_num - 1 > range->range_max) |
| 1156 | return -EINVAL; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1157 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1158 | /* ... or single page boundary */ |
| 1159 | if (val_num > range->window_len - win_offset) |
| 1160 | return -EINVAL; |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1161 | } |
| 1162 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1163 | /* It is possible to have selector register inside data window. |
| 1164 | In that case, selector register is located on every page and |
| 1165 | it needs no page switching, when accessed alone. */ |
| 1166 | if (val_num > 1 || |
| 1167 | range->window_start + win_offset != range->selector_reg) { |
| 1168 | /* Use separate work_buf during page switching */ |
| 1169 | orig_work_buf = map->work_buf; |
| 1170 | map->work_buf = map->selector_work_buf; |
| 1171 | |
| 1172 | ret = _regmap_update_bits(map, range->selector_reg, |
| 1173 | range->selector_mask, |
| 1174 | win_page << range->selector_shift, |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 1175 | &page_chg, false); |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1176 | |
| 1177 | map->work_buf = orig_work_buf; |
| 1178 | |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 1179 | if (ret != 0) |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1180 | return ret; |
| 1181 | } |
| 1182 | |
| 1183 | *reg = range->window_start + win_offset; |
| 1184 | |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1185 | return 0; |
| 1186 | } |
| 1187 | |
Mark Brown | 584de32 | 2013-03-13 19:19:34 +0000 | [diff] [blame] | 1188 | int _regmap_raw_write(struct regmap *map, unsigned int reg, |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1189 | const void *val, size_t val_len) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1190 | { |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1191 | struct regmap_range_node *range; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1192 | unsigned long flags; |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 1193 | u8 *u8 = map->work_buf; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1194 | void *work_val = map->work_buf + map->format.reg_bytes + |
| 1195 | map->format.pad_bytes; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1196 | void *buf; |
| 1197 | int ret = -ENOTSUPP; |
| 1198 | size_t len; |
Mark Brown | 7330478 | 2011-07-24 11:46:20 +0100 | [diff] [blame] | 1199 | int i; |
| 1200 | |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 1201 | WARN_ON(!map->bus); |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1202 | |
Mark Brown | 7330478 | 2011-07-24 11:46:20 +0100 | [diff] [blame] | 1203 | /* Check for unwritable registers before we start */ |
| 1204 | if (map->writeable_reg) |
| 1205 | for (i = 0; i < val_len / map->format.val_bytes; i++) |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1206 | if (!map->writeable_reg(map->dev, |
| 1207 | reg + (i * map->reg_stride))) |
Mark Brown | 7330478 | 2011-07-24 11:46:20 +0100 | [diff] [blame] | 1208 | return -EINVAL; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1209 | |
Laxman Dewangan | c915719 | 2012-02-10 21:30:27 +0530 | [diff] [blame] | 1210 | if (!map->cache_bypass && map->format.parse_val) { |
| 1211 | unsigned int ival; |
| 1212 | int val_bytes = map->format.val_bytes; |
| 1213 | for (i = 0; i < val_len / val_bytes; i++) { |
Stephen Warren | 5a08d15 | 2013-03-20 17:02:02 -0600 | [diff] [blame] | 1214 | ival = map->format.parse_val(val + (i * val_bytes)); |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1215 | ret = regcache_write(map, reg + (i * map->reg_stride), |
| 1216 | ival); |
Laxman Dewangan | c915719 | 2012-02-10 21:30:27 +0530 | [diff] [blame] | 1217 | if (ret) { |
| 1218 | dev_err(map->dev, |
Mark Brown | 6d04b8a | 2012-10-26 19:05:32 +0100 | [diff] [blame] | 1219 | "Error in caching of register: %x ret: %d\n", |
Laxman Dewangan | c915719 | 2012-02-10 21:30:27 +0530 | [diff] [blame] | 1220 | reg + i, ret); |
| 1221 | return ret; |
| 1222 | } |
| 1223 | } |
| 1224 | if (map->cache_only) { |
| 1225 | map->cache_dirty = true; |
| 1226 | return 0; |
| 1227 | } |
| 1228 | } |
| 1229 | |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1230 | range = _regmap_range_lookup(map, reg); |
| 1231 | if (range) { |
Mark Brown | 8a2ceac | 2012-10-04 18:20:18 +0100 | [diff] [blame] | 1232 | int val_num = val_len / map->format.val_bytes; |
| 1233 | int win_offset = (reg - range->range_min) % range->window_len; |
| 1234 | int win_residue = range->window_len - win_offset; |
| 1235 | |
| 1236 | /* If the write goes beyond the end of the window split it */ |
| 1237 | while (val_num > win_residue) { |
Fabio Estevam | 1a61cfe | 2012-10-25 14:07:18 -0200 | [diff] [blame] | 1238 | dev_dbg(map->dev, "Writing window %d/%zu\n", |
Mark Brown | 8a2ceac | 2012-10-04 18:20:18 +0100 | [diff] [blame] | 1239 | win_residue, val_len / map->format.val_bytes); |
| 1240 | ret = _regmap_raw_write(map, reg, val, win_residue * |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1241 | map->format.val_bytes); |
Mark Brown | 8a2ceac | 2012-10-04 18:20:18 +0100 | [diff] [blame] | 1242 | if (ret != 0) |
| 1243 | return ret; |
| 1244 | |
| 1245 | reg += win_residue; |
| 1246 | val_num -= win_residue; |
| 1247 | val += win_residue * map->format.val_bytes; |
| 1248 | val_len -= win_residue * map->format.val_bytes; |
| 1249 | |
| 1250 | win_offset = (reg - range->range_min) % |
| 1251 | range->window_len; |
| 1252 | win_residue = range->window_len - win_offset; |
| 1253 | } |
| 1254 | |
| 1255 | ret = _regmap_select_page(map, ®, range, val_num); |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 1256 | if (ret != 0) |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 1257 | return ret; |
| 1258 | } |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 1259 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 1260 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1261 | |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 1262 | u8[0] |= map->write_flag_mask; |
| 1263 | |
Mark Brown | 651e013 | 2013-10-08 18:37:36 +0100 | [diff] [blame] | 1264 | /* |
| 1265 | * Essentially all I/O mechanisms will be faster with a single |
| 1266 | * buffer to write. Since register syncs often generate raw |
| 1267 | * writes of single registers optimise that case. |
| 1268 | */ |
| 1269 | if (val != work_val && val_len == map->format.val_bytes) { |
| 1270 | memcpy(work_val, val, map->format.val_bytes); |
| 1271 | val = work_val; |
| 1272 | } |
| 1273 | |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1274 | if (map->async && map->bus->async_write) { |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1275 | struct regmap_async *async; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1276 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1277 | trace_regmap_async_write_start(map, reg, val_len); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 1278 | |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1279 | spin_lock_irqsave(&map->async_lock, flags); |
| 1280 | async = list_first_entry_or_null(&map->async_free, |
| 1281 | struct regmap_async, |
| 1282 | list); |
| 1283 | if (async) |
| 1284 | list_del(&async->list); |
| 1285 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 1286 | |
| 1287 | if (!async) { |
| 1288 | async = map->bus->async_alloc(); |
| 1289 | if (!async) |
| 1290 | return -ENOMEM; |
| 1291 | |
| 1292 | async->work_buf = kzalloc(map->format.buf_size, |
| 1293 | GFP_KERNEL | GFP_DMA); |
| 1294 | if (!async->work_buf) { |
| 1295 | kfree(async); |
| 1296 | return -ENOMEM; |
| 1297 | } |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1298 | } |
| 1299 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1300 | async->map = map; |
| 1301 | |
| 1302 | /* If the caller supplied the value we can use it safely. */ |
| 1303 | memcpy(async->work_buf, map->work_buf, map->format.pad_bytes + |
| 1304 | map->format.reg_bytes + map->format.val_bytes); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1305 | |
| 1306 | spin_lock_irqsave(&map->async_lock, flags); |
| 1307 | list_add_tail(&async->list, &map->async_list); |
| 1308 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 1309 | |
Mark Brown | 04c50cc | 2013-10-10 22:38:29 +0100 | [diff] [blame] | 1310 | if (val != work_val) |
| 1311 | ret = map->bus->async_write(map->bus_context, |
| 1312 | async->work_buf, |
| 1313 | map->format.reg_bytes + |
| 1314 | map->format.pad_bytes, |
| 1315 | val, val_len, async); |
| 1316 | else |
| 1317 | ret = map->bus->async_write(map->bus_context, |
| 1318 | async->work_buf, |
| 1319 | map->format.reg_bytes + |
| 1320 | map->format.pad_bytes + |
| 1321 | val_len, NULL, 0, async); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1322 | |
| 1323 | if (ret != 0) { |
| 1324 | dev_err(map->dev, "Failed to schedule write: %d\n", |
| 1325 | ret); |
| 1326 | |
| 1327 | spin_lock_irqsave(&map->async_lock, flags); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 1328 | list_move(&async->list, &map->async_free); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1329 | spin_unlock_irqrestore(&map->async_lock, flags); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1330 | } |
Mark Brown | f951b65 | 2013-03-27 13:08:44 +0000 | [diff] [blame] | 1331 | |
| 1332 | return ret; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1333 | } |
| 1334 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1335 | trace_regmap_hw_write_start(map, reg, val_len / map->format.val_bytes); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1336 | |
Mark Brown | 2547e20 | 2011-07-20 21:47:22 +0100 | [diff] [blame] | 1337 | /* If we're doing a single register write we can probably just |
| 1338 | * send the work_buf directly, otherwise try to do a gather |
| 1339 | * write. |
| 1340 | */ |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 1341 | if (val == work_val) |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1342 | ret = map->bus->write(map->bus_context, map->work_buf, |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1343 | map->format.reg_bytes + |
| 1344 | map->format.pad_bytes + |
| 1345 | val_len); |
Mark Brown | 2547e20 | 2011-07-20 21:47:22 +0100 | [diff] [blame] | 1346 | else if (map->bus->gather_write) |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1347 | ret = map->bus->gather_write(map->bus_context, map->work_buf, |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1348 | map->format.reg_bytes + |
| 1349 | map->format.pad_bytes, |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1350 | val, val_len); |
| 1351 | |
Mark Brown | 2547e20 | 2011-07-20 21:47:22 +0100 | [diff] [blame] | 1352 | /* If that didn't work fall back on linearising by hand. */ |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1353 | if (ret == -ENOTSUPP) { |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1354 | len = map->format.reg_bytes + map->format.pad_bytes + val_len; |
| 1355 | buf = kzalloc(len, GFP_KERNEL); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1356 | if (!buf) |
| 1357 | return -ENOMEM; |
| 1358 | |
| 1359 | memcpy(buf, map->work_buf, map->format.reg_bytes); |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 1360 | memcpy(buf + map->format.reg_bytes + map->format.pad_bytes, |
| 1361 | val, val_len); |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 1362 | ret = map->bus->write(map->bus_context, buf, len); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1363 | |
| 1364 | kfree(buf); |
| 1365 | } |
| 1366 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1367 | trace_regmap_hw_write_done(map, reg, val_len / map->format.val_bytes); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1368 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1369 | return ret; |
| 1370 | } |
| 1371 | |
Mark Brown | 221ad7f | 2013-03-26 21:24:20 +0000 | [diff] [blame] | 1372 | /** |
| 1373 | * regmap_can_raw_write - Test if regmap_raw_write() is supported |
| 1374 | * |
| 1375 | * @map: Map to check. |
| 1376 | */ |
| 1377 | bool regmap_can_raw_write(struct regmap *map) |
| 1378 | { |
Markus Pargmann | 07ea400 | 2015-08-12 12:12:33 +0200 | [diff] [blame] | 1379 | return map->bus && map->bus->write && map->format.format_val && |
| 1380 | map->format.format_reg; |
Mark Brown | 221ad7f | 2013-03-26 21:24:20 +0000 | [diff] [blame] | 1381 | } |
| 1382 | EXPORT_SYMBOL_GPL(regmap_can_raw_write); |
| 1383 | |
Markus Pargmann | f50c9eb | 2015-08-30 09:33:54 +0200 | [diff] [blame] | 1384 | /** |
| 1385 | * regmap_get_raw_read_max - Get the maximum size we can read |
| 1386 | * |
| 1387 | * @map: Map to check. |
| 1388 | */ |
| 1389 | size_t regmap_get_raw_read_max(struct regmap *map) |
| 1390 | { |
| 1391 | return map->max_raw_read; |
| 1392 | } |
| 1393 | EXPORT_SYMBOL_GPL(regmap_get_raw_read_max); |
| 1394 | |
| 1395 | /** |
| 1396 | * regmap_get_raw_write_max - Get the maximum size we can read |
| 1397 | * |
| 1398 | * @map: Map to check. |
| 1399 | */ |
| 1400 | size_t regmap_get_raw_write_max(struct regmap *map) |
| 1401 | { |
| 1402 | return map->max_raw_write; |
| 1403 | } |
| 1404 | EXPORT_SYMBOL_GPL(regmap_get_raw_write_max); |
| 1405 | |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1406 | static int _regmap_bus_formatted_write(void *context, unsigned int reg, |
| 1407 | unsigned int val) |
| 1408 | { |
| 1409 | int ret; |
| 1410 | struct regmap_range_node *range; |
| 1411 | struct regmap *map = context; |
| 1412 | |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 1413 | WARN_ON(!map->bus || !map->format.format_write); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1414 | |
| 1415 | range = _regmap_range_lookup(map, reg); |
| 1416 | if (range) { |
| 1417 | ret = _regmap_select_page(map, ®, range, 1); |
| 1418 | if (ret != 0) |
| 1419 | return ret; |
| 1420 | } |
| 1421 | |
| 1422 | map->format.format_write(map, reg, val); |
| 1423 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1424 | trace_regmap_hw_write_start(map, reg, 1); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1425 | |
| 1426 | ret = map->bus->write(map->bus_context, map->work_buf, |
| 1427 | map->format.buf_size); |
| 1428 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1429 | trace_regmap_hw_write_done(map, reg, 1); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1430 | |
| 1431 | return ret; |
| 1432 | } |
| 1433 | |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 1434 | static int _regmap_bus_reg_write(void *context, unsigned int reg, |
| 1435 | unsigned int val) |
| 1436 | { |
| 1437 | struct regmap *map = context; |
| 1438 | |
| 1439 | return map->bus->reg_write(map->bus_context, reg, val); |
| 1440 | } |
| 1441 | |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1442 | static int _regmap_bus_raw_write(void *context, unsigned int reg, |
| 1443 | unsigned int val) |
| 1444 | { |
| 1445 | struct regmap *map = context; |
| 1446 | |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 1447 | WARN_ON(!map->bus || !map->format.format_val); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1448 | |
| 1449 | map->format.format_val(map->work_buf + map->format.reg_bytes |
| 1450 | + map->format.pad_bytes, val, 0); |
| 1451 | return _regmap_raw_write(map, reg, |
| 1452 | map->work_buf + |
| 1453 | map->format.reg_bytes + |
| 1454 | map->format.pad_bytes, |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1455 | map->format.val_bytes); |
Andrey Smirnov | 07c320d | 2013-01-12 12:54:13 -0800 | [diff] [blame] | 1456 | } |
| 1457 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1458 | static inline void *_regmap_map_get_context(struct regmap *map) |
| 1459 | { |
| 1460 | return (map->bus) ? map : map->bus_context; |
| 1461 | } |
| 1462 | |
Dimitris Papastamos | 4d2dc09 | 2011-09-29 10:39:07 +0100 | [diff] [blame] | 1463 | int _regmap_write(struct regmap *map, unsigned int reg, |
| 1464 | unsigned int val) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1465 | { |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1466 | int ret; |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1467 | void *context = _regmap_map_get_context(map); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1468 | |
Ionut Nicu | 515f226 | 2013-08-09 12:09:20 +0200 | [diff] [blame] | 1469 | if (!regmap_writeable(map, reg)) |
| 1470 | return -EIO; |
| 1471 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1472 | if (!map->cache_bypass && !map->defer_caching) { |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1473 | ret = regcache_write(map, reg, val); |
| 1474 | if (ret != 0) |
| 1475 | return ret; |
Mark Brown | 8ae0d7e | 2011-10-26 10:34:22 +0200 | [diff] [blame] | 1476 | if (map->cache_only) { |
| 1477 | map->cache_dirty = true; |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1478 | return 0; |
Mark Brown | 8ae0d7e | 2011-10-26 10:34:22 +0200 | [diff] [blame] | 1479 | } |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 1480 | } |
| 1481 | |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 1482 | #ifdef LOG_DEVICE |
Pankaj Dubey | 5336be8 | 2014-09-27 09:47:55 +0530 | [diff] [blame] | 1483 | if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 1484 | dev_info(map->dev, "%x <= %x\n", reg, val); |
| 1485 | #endif |
| 1486 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1487 | trace_regmap_reg_write(map, reg, val); |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 1488 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1489 | return map->reg_write(context, reg, val); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1490 | } |
| 1491 | |
| 1492 | /** |
| 1493 | * regmap_write(): Write a value to a single register |
| 1494 | * |
| 1495 | * @map: Register map to write to |
| 1496 | * @reg: Register to write to |
| 1497 | * @val: Value to be written |
| 1498 | * |
| 1499 | * A value of zero will be returned on success, a negative errno will |
| 1500 | * be returned in error cases. |
| 1501 | */ |
| 1502 | int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) |
| 1503 | { |
| 1504 | int ret; |
| 1505 | |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1506 | if (reg % map->reg_stride) |
| 1507 | return -EINVAL; |
| 1508 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1509 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1510 | |
| 1511 | ret = _regmap_write(map, reg, val); |
| 1512 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1513 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1514 | |
| 1515 | return ret; |
| 1516 | } |
| 1517 | EXPORT_SYMBOL_GPL(regmap_write); |
| 1518 | |
| 1519 | /** |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 1520 | * regmap_write_async(): Write a value to a single register asynchronously |
| 1521 | * |
| 1522 | * @map: Register map to write to |
| 1523 | * @reg: Register to write to |
| 1524 | * @val: Value to be written |
| 1525 | * |
| 1526 | * A value of zero will be returned on success, a negative errno will |
| 1527 | * be returned in error cases. |
| 1528 | */ |
| 1529 | int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val) |
| 1530 | { |
| 1531 | int ret; |
| 1532 | |
| 1533 | if (reg % map->reg_stride) |
| 1534 | return -EINVAL; |
| 1535 | |
| 1536 | map->lock(map->lock_arg); |
| 1537 | |
| 1538 | map->async = true; |
| 1539 | |
| 1540 | ret = _regmap_write(map, reg, val); |
| 1541 | |
| 1542 | map->async = false; |
| 1543 | |
| 1544 | map->unlock(map->lock_arg); |
| 1545 | |
| 1546 | return ret; |
| 1547 | } |
| 1548 | EXPORT_SYMBOL_GPL(regmap_write_async); |
| 1549 | |
| 1550 | /** |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1551 | * regmap_raw_write(): Write raw values to one or more registers |
| 1552 | * |
| 1553 | * @map: Register map to write to |
| 1554 | * @reg: Initial register to write to |
| 1555 | * @val: Block of data to be written, laid out for direct transmission to the |
| 1556 | * device |
| 1557 | * @val_len: Length of data pointed to by val. |
| 1558 | * |
| 1559 | * This function is intended to be used for things like firmware |
| 1560 | * download where a large block of data needs to be transferred to the |
| 1561 | * device. No formatting will be done on the data provided. |
| 1562 | * |
| 1563 | * A value of zero will be returned on success, a negative errno will |
| 1564 | * be returned in error cases. |
| 1565 | */ |
| 1566 | int regmap_raw_write(struct regmap *map, unsigned int reg, |
| 1567 | const void *val, size_t val_len) |
| 1568 | { |
| 1569 | int ret; |
| 1570 | |
Mark Brown | 221ad7f | 2013-03-26 21:24:20 +0000 | [diff] [blame] | 1571 | if (!regmap_can_raw_write(map)) |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 1572 | return -EINVAL; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 1573 | if (val_len % map->format.val_bytes) |
| 1574 | return -EINVAL; |
Markus Pargmann | c335931 | 2015-08-30 09:33:55 +0200 | [diff] [blame] | 1575 | if (map->max_raw_write && map->max_raw_write > val_len) |
| 1576 | return -E2BIG; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 1577 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1578 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1579 | |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1580 | ret = _regmap_raw_write(map, reg, val, val_len); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1581 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 1582 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 1583 | |
| 1584 | return ret; |
| 1585 | } |
| 1586 | EXPORT_SYMBOL_GPL(regmap_raw_write); |
| 1587 | |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 1588 | /** |
| 1589 | * regmap_field_write(): Write a value to a single register field |
| 1590 | * |
| 1591 | * @field: Register field to write to |
| 1592 | * @val: Value to be written |
| 1593 | * |
| 1594 | * A value of zero will be returned on success, a negative errno will |
| 1595 | * be returned in error cases. |
| 1596 | */ |
| 1597 | int regmap_field_write(struct regmap_field *field, unsigned int val) |
| 1598 | { |
| 1599 | return regmap_update_bits(field->regmap, field->reg, |
| 1600 | field->mask, val << field->shift); |
| 1601 | } |
| 1602 | EXPORT_SYMBOL_GPL(regmap_field_write); |
| 1603 | |
Kuninori Morimoto | fdf2002 | 2013-09-01 20:24:50 -0700 | [diff] [blame] | 1604 | /** |
| 1605 | * regmap_field_update_bits(): Perform a read/modify/write cycle |
| 1606 | * on the register field |
| 1607 | * |
| 1608 | * @field: Register field to write to |
| 1609 | * @mask: Bitmask to change |
| 1610 | * @val: Value to be written |
| 1611 | * |
| 1612 | * A value of zero will be returned on success, a negative errno will |
| 1613 | * be returned in error cases. |
| 1614 | */ |
| 1615 | int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val) |
| 1616 | { |
| 1617 | mask = (mask << field->shift) & field->mask; |
| 1618 | |
| 1619 | return regmap_update_bits(field->regmap, field->reg, |
| 1620 | mask, val << field->shift); |
| 1621 | } |
| 1622 | EXPORT_SYMBOL_GPL(regmap_field_update_bits); |
| 1623 | |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1624 | /** |
| 1625 | * regmap_fields_write(): Write a value to a single register field with port ID |
| 1626 | * |
| 1627 | * @field: Register field to write to |
| 1628 | * @id: port ID |
| 1629 | * @val: Value to be written |
| 1630 | * |
| 1631 | * A value of zero will be returned on success, a negative errno will |
| 1632 | * be returned in error cases. |
| 1633 | */ |
| 1634 | int regmap_fields_write(struct regmap_field *field, unsigned int id, |
| 1635 | unsigned int val) |
| 1636 | { |
| 1637 | if (id >= field->id_size) |
| 1638 | return -EINVAL; |
| 1639 | |
| 1640 | return regmap_update_bits(field->regmap, |
| 1641 | field->reg + (field->id_offset * id), |
| 1642 | field->mask, val << field->shift); |
| 1643 | } |
| 1644 | EXPORT_SYMBOL_GPL(regmap_fields_write); |
| 1645 | |
Kuninori Morimoto | e874e6c | 2015-06-16 08:52:55 +0000 | [diff] [blame] | 1646 | int regmap_fields_force_write(struct regmap_field *field, unsigned int id, |
| 1647 | unsigned int val) |
| 1648 | { |
| 1649 | if (id >= field->id_size) |
| 1650 | return -EINVAL; |
| 1651 | |
| 1652 | return regmap_write_bits(field->regmap, |
| 1653 | field->reg + (field->id_offset * id), |
| 1654 | field->mask, val << field->shift); |
| 1655 | } |
| 1656 | EXPORT_SYMBOL_GPL(regmap_fields_force_write); |
| 1657 | |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 1658 | /** |
| 1659 | * regmap_fields_update_bits(): Perform a read/modify/write cycle |
| 1660 | * on the register field |
| 1661 | * |
| 1662 | * @field: Register field to write to |
| 1663 | * @id: port ID |
| 1664 | * @mask: Bitmask to change |
| 1665 | * @val: Value to be written |
| 1666 | * |
| 1667 | * A value of zero will be returned on success, a negative errno will |
| 1668 | * be returned in error cases. |
| 1669 | */ |
| 1670 | int regmap_fields_update_bits(struct regmap_field *field, unsigned int id, |
| 1671 | unsigned int mask, unsigned int val) |
| 1672 | { |
| 1673 | if (id >= field->id_size) |
| 1674 | return -EINVAL; |
| 1675 | |
| 1676 | mask = (mask << field->shift) & field->mask; |
| 1677 | |
| 1678 | return regmap_update_bits(field->regmap, |
| 1679 | field->reg + (field->id_offset * id), |
| 1680 | mask, val << field->shift); |
| 1681 | } |
| 1682 | EXPORT_SYMBOL_GPL(regmap_fields_update_bits); |
| 1683 | |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1684 | /* |
| 1685 | * regmap_bulk_write(): Write multiple registers to the device |
| 1686 | * |
| 1687 | * @map: Register map to write to |
| 1688 | * @reg: First register to be write from |
| 1689 | * @val: Block of data to be written, in native register size for device |
| 1690 | * @val_count: Number of registers to write |
| 1691 | * |
| 1692 | * This function is intended to be used for writing a large block of |
Nestor Ovroy | 31b35e9e | 2013-01-18 16:51:03 +0100 | [diff] [blame] | 1693 | * data to the device either in single transfer or multiple transfer. |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1694 | * |
| 1695 | * A value of zero will be returned on success, a negative errno will |
| 1696 | * be returned in error cases. |
| 1697 | */ |
| 1698 | int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, |
| 1699 | size_t val_count) |
| 1700 | { |
| 1701 | int ret = 0, i; |
| 1702 | size_t val_bytes = map->format.val_bytes; |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1703 | size_t total_size = val_bytes * val_count; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1704 | |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1705 | if (map->bus && !map->format.parse_inplace) |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1706 | return -EINVAL; |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 1707 | if (reg % map->reg_stride) |
| 1708 | return -EINVAL; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1709 | |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1710 | /* |
| 1711 | * Some devices don't support bulk write, for |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1712 | * them we have a series of single write operations in the first two if |
| 1713 | * blocks. |
| 1714 | * |
| 1715 | * The first if block is used for memory mapped io. It does not allow |
| 1716 | * val_bytes of 3 for example. |
| 1717 | * The second one is used for busses which do not have this limitation |
| 1718 | * and can write arbitrary value lengths. |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1719 | */ |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1720 | if (!map->bus) { |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1721 | map->lock(map->lock_arg); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1722 | for (i = 0; i < val_count; i++) { |
| 1723 | unsigned int ival; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1724 | |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1725 | switch (val_bytes) { |
| 1726 | case 1: |
| 1727 | ival = *(u8 *)(val + (i * val_bytes)); |
| 1728 | break; |
| 1729 | case 2: |
| 1730 | ival = *(u16 *)(val + (i * val_bytes)); |
| 1731 | break; |
| 1732 | case 4: |
| 1733 | ival = *(u32 *)(val + (i * val_bytes)); |
| 1734 | break; |
| 1735 | #ifdef CONFIG_64BIT |
| 1736 | case 8: |
| 1737 | ival = *(u64 *)(val + (i * val_bytes)); |
| 1738 | break; |
| 1739 | #endif |
| 1740 | default: |
| 1741 | ret = -EINVAL; |
| 1742 | goto out; |
| 1743 | } |
| 1744 | |
| 1745 | ret = _regmap_write(map, reg + (i * map->reg_stride), |
| 1746 | ival); |
| 1747 | if (ret != 0) |
| 1748 | goto out; |
| 1749 | } |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1750 | out: |
| 1751 | map->unlock(map->lock_arg); |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1752 | } else if (map->use_single_write || |
| 1753 | (map->max_raw_write && map->max_raw_write < total_size)) { |
| 1754 | int chunk_stride = map->reg_stride; |
| 1755 | size_t chunk_size = val_bytes; |
| 1756 | size_t chunk_count = val_count; |
| 1757 | |
| 1758 | if (!map->use_single_write) { |
| 1759 | chunk_size = map->max_raw_write; |
| 1760 | if (chunk_size % val_bytes) |
| 1761 | chunk_size -= chunk_size % val_bytes; |
| 1762 | chunk_count = total_size / chunk_size; |
| 1763 | chunk_stride *= chunk_size / val_bytes; |
| 1764 | } |
| 1765 | |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1766 | map->lock(map->lock_arg); |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1767 | /* Write as many bytes as possible with chunk_size */ |
| 1768 | for (i = 0; i < chunk_count; i++) { |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1769 | ret = _regmap_raw_write(map, |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1770 | reg + (i * chunk_stride), |
| 1771 | val + (i * chunk_size), |
| 1772 | chunk_size); |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1773 | if (ret) |
| 1774 | break; |
| 1775 | } |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 1776 | |
| 1777 | /* Write remaining bytes */ |
| 1778 | if (!ret && chunk_size * i < total_size) { |
| 1779 | ret = _regmap_raw_write(map, reg + (i * chunk_stride), |
| 1780 | val + (i * chunk_size), |
| 1781 | total_size - i * chunk_size); |
| 1782 | } |
Markus Pargmann | c594b7f | 2015-08-21 10:26:41 +0200 | [diff] [blame] | 1783 | map->unlock(map->lock_arg); |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1784 | } else { |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1785 | void *wval; |
| 1786 | |
Xiubo Li | d6b41cb | 2014-09-28 17:09:54 +0800 | [diff] [blame] | 1787 | if (!val_count) |
| 1788 | return -EINVAL; |
| 1789 | |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1790 | wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); |
| 1791 | if (!wval) { |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1792 | dev_err(map->dev, "Error in memory allocation\n"); |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1793 | return -ENOMEM; |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1794 | } |
| 1795 | for (i = 0; i < val_count * val_bytes; i += val_bytes) |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 1796 | map->format.parse_inplace(wval + i); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1797 | |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1798 | map->lock(map->lock_arg); |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 1799 | ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); |
Takashi Iwai | 4999e96 | 2014-03-18 12:58:33 +0100 | [diff] [blame] | 1800 | map->unlock(map->lock_arg); |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1801 | |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1802 | kfree(wval); |
Stephen Boyd | f429836 | 2013-12-26 13:52:04 -0800 | [diff] [blame] | 1803 | } |
Laxman Dewangan | 8eaeb21 | 2012-02-12 19:49:43 +0530 | [diff] [blame] | 1804 | return ret; |
| 1805 | } |
| 1806 | EXPORT_SYMBOL_GPL(regmap_bulk_write); |
| 1807 | |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 1808 | /* |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1809 | * _regmap_raw_multi_reg_write() |
| 1810 | * |
| 1811 | * the (register,newvalue) pairs in regs have not been formatted, but |
| 1812 | * they are all in the same page and have been changed to being page |
Xiubo Li | b486afb | 2015-08-12 15:02:19 +0800 | [diff] [blame] | 1813 | * relative. The page register has been written if that was necessary. |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1814 | */ |
| 1815 | static int _regmap_raw_multi_reg_write(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 1816 | const struct reg_sequence *regs, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1817 | size_t num_regs) |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 1818 | { |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1819 | int ret; |
| 1820 | void *buf; |
| 1821 | int i; |
| 1822 | u8 *u8; |
| 1823 | size_t val_bytes = map->format.val_bytes; |
| 1824 | size_t reg_bytes = map->format.reg_bytes; |
| 1825 | size_t pad_bytes = map->format.pad_bytes; |
| 1826 | size_t pair_size = reg_bytes + pad_bytes + val_bytes; |
| 1827 | size_t len = pair_size * num_regs; |
| 1828 | |
Xiubo Li | f5727cd | 2014-04-30 17:31:08 +0800 | [diff] [blame] | 1829 | if (!len) |
| 1830 | return -EINVAL; |
| 1831 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1832 | buf = kzalloc(len, GFP_KERNEL); |
| 1833 | if (!buf) |
| 1834 | return -ENOMEM; |
| 1835 | |
| 1836 | /* We have to linearise by hand. */ |
| 1837 | |
| 1838 | u8 = buf; |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 1839 | |
| 1840 | for (i = 0; i < num_regs; i++) { |
Markus Pargmann | 2f9b660 | 2015-08-12 12:12:28 +0200 | [diff] [blame] | 1841 | unsigned int reg = regs[i].reg; |
| 1842 | unsigned int val = regs[i].def; |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1843 | trace_regmap_hw_write_start(map, reg, 1); |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1844 | map->format.format_reg(u8, reg, map->reg_shift); |
| 1845 | u8 += reg_bytes + pad_bytes; |
| 1846 | map->format.format_val(u8, val, 0); |
| 1847 | u8 += val_bytes; |
| 1848 | } |
| 1849 | u8 = buf; |
| 1850 | *u8 |= map->write_flag_mask; |
| 1851 | |
| 1852 | ret = map->bus->write(map->bus_context, buf, len); |
| 1853 | |
| 1854 | kfree(buf); |
| 1855 | |
| 1856 | for (i = 0; i < num_regs; i++) { |
| 1857 | int reg = regs[i].reg; |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 1858 | trace_regmap_hw_write_done(map, reg, 1); |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1859 | } |
| 1860 | return ret; |
| 1861 | } |
| 1862 | |
| 1863 | static unsigned int _regmap_register_page(struct regmap *map, |
| 1864 | unsigned int reg, |
| 1865 | struct regmap_range_node *range) |
| 1866 | { |
| 1867 | unsigned int win_page = (reg - range->range_min) / range->window_len; |
| 1868 | |
| 1869 | return win_page; |
| 1870 | } |
| 1871 | |
| 1872 | static int _regmap_range_multi_paged_reg_write(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 1873 | struct reg_sequence *regs, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1874 | size_t num_regs) |
| 1875 | { |
| 1876 | int ret; |
| 1877 | int i, n; |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 1878 | struct reg_sequence *base; |
Geert Uytterhoeven | b48d139 | 2014-04-22 12:47:29 +0200 | [diff] [blame] | 1879 | unsigned int this_page = 0; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1880 | unsigned int page_change = 0; |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1881 | /* |
| 1882 | * the set of registers are not neccessarily in order, but |
| 1883 | * since the order of write must be preserved this algorithm |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1884 | * chops the set each time the page changes. This also applies |
| 1885 | * if there is a delay required at any point in the sequence. |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1886 | */ |
| 1887 | base = regs; |
| 1888 | for (i = 0, n = 0; i < num_regs; i++, n++) { |
| 1889 | unsigned int reg = regs[i].reg; |
| 1890 | struct regmap_range_node *range; |
| 1891 | |
| 1892 | range = _regmap_range_lookup(map, reg); |
| 1893 | if (range) { |
| 1894 | unsigned int win_page = _regmap_register_page(map, reg, |
| 1895 | range); |
| 1896 | |
| 1897 | if (i == 0) |
| 1898 | this_page = win_page; |
| 1899 | if (win_page != this_page) { |
| 1900 | this_page = win_page; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1901 | page_change = 1; |
| 1902 | } |
| 1903 | } |
| 1904 | |
| 1905 | /* If we have both a page change and a delay make sure to |
| 1906 | * write the regs and apply the delay before we change the |
| 1907 | * page. |
| 1908 | */ |
| 1909 | |
| 1910 | if (page_change || regs[i].delay_us) { |
| 1911 | |
| 1912 | /* For situations where the first write requires |
| 1913 | * a delay we need to make sure we don't call |
| 1914 | * raw_multi_reg_write with n=0 |
| 1915 | * This can't occur with page breaks as we |
| 1916 | * never write on the first iteration |
| 1917 | */ |
| 1918 | if (regs[i].delay_us && i == 0) |
| 1919 | n = 1; |
| 1920 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1921 | ret = _regmap_raw_multi_reg_write(map, base, n); |
| 1922 | if (ret != 0) |
| 1923 | return ret; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1924 | |
| 1925 | if (regs[i].delay_us) |
| 1926 | udelay(regs[i].delay_us); |
| 1927 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1928 | base += n; |
| 1929 | n = 0; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1930 | |
| 1931 | if (page_change) { |
| 1932 | ret = _regmap_select_page(map, |
| 1933 | &base[n].reg, |
| 1934 | range, 1); |
| 1935 | if (ret != 0) |
| 1936 | return ret; |
| 1937 | |
| 1938 | page_change = 0; |
| 1939 | } |
| 1940 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1941 | } |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1942 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1943 | } |
| 1944 | if (n > 0) |
| 1945 | return _regmap_raw_multi_reg_write(map, base, n); |
| 1946 | return 0; |
| 1947 | } |
| 1948 | |
| 1949 | static int _regmap_multi_reg_write(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 1950 | const struct reg_sequence *regs, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1951 | size_t num_regs) |
| 1952 | { |
| 1953 | int i; |
| 1954 | int ret; |
| 1955 | |
| 1956 | if (!map->can_multi_write) { |
| 1957 | for (i = 0; i < num_regs; i++) { |
| 1958 | ret = _regmap_write(map, regs[i].reg, regs[i].def); |
| 1959 | if (ret != 0) |
| 1960 | return ret; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 1961 | |
| 1962 | if (regs[i].delay_us) |
| 1963 | udelay(regs[i].delay_us); |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1964 | } |
| 1965 | return 0; |
| 1966 | } |
| 1967 | |
| 1968 | if (!map->format.parse_inplace) |
| 1969 | return -EINVAL; |
| 1970 | |
| 1971 | if (map->writeable_reg) |
| 1972 | for (i = 0; i < num_regs; i++) { |
| 1973 | int reg = regs[i].reg; |
| 1974 | if (!map->writeable_reg(map->dev, reg)) |
| 1975 | return -EINVAL; |
| 1976 | if (reg % map->reg_stride) |
| 1977 | return -EINVAL; |
| 1978 | } |
| 1979 | |
| 1980 | if (!map->cache_bypass) { |
| 1981 | for (i = 0; i < num_regs; i++) { |
| 1982 | unsigned int val = regs[i].def; |
| 1983 | unsigned int reg = regs[i].reg; |
| 1984 | ret = regcache_write(map, reg, val); |
| 1985 | if (ret) { |
| 1986 | dev_err(map->dev, |
| 1987 | "Error in caching of register: %x ret: %d\n", |
| 1988 | reg, ret); |
| 1989 | return ret; |
| 1990 | } |
| 1991 | } |
| 1992 | if (map->cache_only) { |
| 1993 | map->cache_dirty = true; |
| 1994 | return 0; |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 1995 | } |
| 1996 | } |
| 1997 | |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 1998 | WARN_ON(!map->bus); |
| 1999 | |
| 2000 | for (i = 0; i < num_regs; i++) { |
| 2001 | unsigned int reg = regs[i].reg; |
| 2002 | struct regmap_range_node *range; |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2003 | |
| 2004 | /* Coalesce all the writes between a page break or a delay |
| 2005 | * in a sequence |
| 2006 | */ |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2007 | range = _regmap_range_lookup(map, reg); |
Nariman Poushin | 2de9d60 | 2015-07-16 16:36:22 +0100 | [diff] [blame] | 2008 | if (range || regs[i].delay_us) { |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2009 | size_t len = sizeof(struct reg_sequence)*num_regs; |
| 2010 | struct reg_sequence *base = kmemdup(regs, len, |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2011 | GFP_KERNEL); |
| 2012 | if (!base) |
| 2013 | return -ENOMEM; |
| 2014 | ret = _regmap_range_multi_paged_reg_write(map, base, |
| 2015 | num_regs); |
| 2016 | kfree(base); |
| 2017 | |
| 2018 | return ret; |
| 2019 | } |
| 2020 | } |
| 2021 | return _regmap_raw_multi_reg_write(map, regs, num_regs); |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2022 | } |
| 2023 | |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2024 | /* |
| 2025 | * regmap_multi_reg_write(): Write multiple registers to the device |
| 2026 | * |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2027 | * where the set of register,value pairs are supplied in any order, |
| 2028 | * possibly not all in a single range. |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2029 | * |
| 2030 | * @map: Register map to write to |
| 2031 | * @regs: Array of structures containing register,value to be written |
| 2032 | * @num_regs: Number of registers to write |
| 2033 | * |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2034 | * The 'normal' block write mode will send ultimately send data on the |
| 2035 | * target bus as R,V1,V2,V3,..,Vn where successively higer registers are |
| 2036 | * addressed. However, this alternative block multi write mode will send |
| 2037 | * the data as R1,V1,R2,V2,..,Rn,Vn on the target bus. The target device |
| 2038 | * must of course support the mode. |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2039 | * |
Opensource [Anthony Olech] | e894c3f | 2014-03-04 13:54:02 +0000 | [diff] [blame] | 2040 | * A value of zero will be returned on success, a negative errno will be |
| 2041 | * returned in error cases. |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2042 | */ |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2043 | int regmap_multi_reg_write(struct regmap *map, const struct reg_sequence *regs, |
Charles Keepax | f7e2cec | 2014-02-25 13:45:49 +0000 | [diff] [blame] | 2044 | int num_regs) |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2045 | { |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2046 | int ret; |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2047 | |
| 2048 | map->lock(map->lock_arg); |
| 2049 | |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2050 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
| 2051 | |
Anthony Olech | e33fabd | 2013-10-11 15:31:11 +0100 | [diff] [blame] | 2052 | map->unlock(map->lock_arg); |
| 2053 | |
| 2054 | return ret; |
| 2055 | } |
| 2056 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write); |
| 2057 | |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2058 | /* |
| 2059 | * regmap_multi_reg_write_bypassed(): Write multiple registers to the |
| 2060 | * device but not the cache |
| 2061 | * |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2062 | * where the set of register are supplied in any order |
| 2063 | * |
| 2064 | * @map: Register map to write to |
| 2065 | * @regs: Array of structures containing register,value to be written |
| 2066 | * @num_regs: Number of registers to write |
| 2067 | * |
| 2068 | * This function is intended to be used for writing a large block of data |
| 2069 | * atomically to the device in single transfer for those I2C client devices |
| 2070 | * that implement this alternative block write mode. |
| 2071 | * |
| 2072 | * A value of zero will be returned on success, a negative errno will |
| 2073 | * be returned in error cases. |
| 2074 | */ |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2075 | int regmap_multi_reg_write_bypassed(struct regmap *map, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2076 | const struct reg_sequence *regs, |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2077 | int num_regs) |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2078 | { |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2079 | int ret; |
| 2080 | bool bypass; |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2081 | |
| 2082 | map->lock(map->lock_arg); |
| 2083 | |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2084 | bypass = map->cache_bypass; |
| 2085 | map->cache_bypass = true; |
| 2086 | |
| 2087 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
| 2088 | |
| 2089 | map->cache_bypass = bypass; |
| 2090 | |
Mark Brown | 0a81980 | 2013-10-09 12:28:52 +0100 | [diff] [blame] | 2091 | map->unlock(map->lock_arg); |
| 2092 | |
| 2093 | return ret; |
| 2094 | } |
Charles Keepax | 1d5b40b | 2014-02-25 13:45:50 +0000 | [diff] [blame] | 2095 | EXPORT_SYMBOL_GPL(regmap_multi_reg_write_bypassed); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2096 | |
| 2097 | /** |
| 2098 | * regmap_raw_write_async(): Write raw values to one or more registers |
| 2099 | * asynchronously |
| 2100 | * |
| 2101 | * @map: Register map to write to |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2102 | * @reg: Initial register to write to |
| 2103 | * @val: Block of data to be written, laid out for direct transmission to the |
| 2104 | * device. Must be valid until regmap_async_complete() is called. |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 2105 | * @val_len: Length of data pointed to by val. |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2106 | * |
| 2107 | * This function is intended to be used for things like firmware |
| 2108 | * download where a large block of data needs to be transferred to the |
Mark Brown | f1b5c5c | 2013-03-13 19:18:13 +0000 | [diff] [blame] | 2109 | * device. No formatting will be done on the data provided. |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2110 | * |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 2111 | * If supported by the underlying bus the write will be scheduled |
| 2112 | * asynchronously, helping maximise I/O speed on higher speed buses |
| 2113 | * like SPI. regmap_async_complete() can be called to ensure that all |
| 2114 | * asynchrnous writes have been completed. |
Mark Brown | 0ff3e62 | 2012-10-04 17:39:13 +0100 | [diff] [blame] | 2115 | * |
Mark Brown | 98bc7df | 2012-10-04 17:31:11 +0100 | [diff] [blame] | 2116 | * A value of zero will be returned on success, a negative errno will |
| 2117 | * be returned in error cases. |
Krystian Garbaciak | 6863ca6 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 2118 | */ |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 2119 | int regmap_raw_write_async(struct regmap *map, unsigned int reg, |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2120 | const void *val, size_t val_len) |
| 2121 | { |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 2122 | int ret; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2123 | |
| 2124 | if (val_len % map->format.val_bytes) |
| 2125 | return -EINVAL; |
| 2126 | if (reg % map->reg_stride) |
Lars-Peter Clausen | 6f30644 | 2011-09-05 20:46:32 +0200 | [diff] [blame] | 2127 | return -EINVAL; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2128 | |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 2129 | map->lock(map->lock_arg); |
| 2130 | |
| 2131 | map->async = true; |
Stephen Warren | 0135bbc | 2012-04-04 15:48:30 -0600 | [diff] [blame] | 2132 | |
Mark Brown | 82159ba | 2012-01-18 10:52:25 +0000 | [diff] [blame] | 2133 | ret = _regmap_raw_write(map, reg, val, val_len); |
Mark Brown | 40c5cc2 | 2011-07-24 22:39:12 +0100 | [diff] [blame] | 2134 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2135 | map->async = false; |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 2136 | |
| 2137 | map->unlock(map->lock_arg); |
| 2138 | |
| 2139 | return ret; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2140 | } |
| 2141 | EXPORT_SYMBOL_GPL(regmap_raw_write_async); |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 2142 | |
| 2143 | static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
| 2144 | unsigned int val_len) |
| 2145 | { |
| 2146 | struct regmap_range_node *range; |
| 2147 | u8 *u8 = map->work_buf; |
| 2148 | int ret; |
| 2149 | |
| 2150 | WARN_ON(!map->bus); |
| 2151 | |
| 2152 | range = _regmap_range_lookup(map, reg); |
| 2153 | if (range) { |
| 2154 | ret = _regmap_select_page(map, ®, range, |
| 2155 | val_len / map->format.val_bytes); |
| 2156 | if (ret != 0) |
| 2157 | return ret; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2158 | } |
| 2159 | |
| 2160 | map->format.format_reg(map->work_buf, reg, map->reg_shift); |
| 2161 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2162 | /* |
| 2163 | * Some buses or devices flag reads by setting the high bits in the |
Xiubo Li | b486afb | 2015-08-12 15:02:19 +0800 | [diff] [blame] | 2164 | * register address; since it's always the high bits for all |
Mark Brown | 1044c18 | 2012-07-06 14:10:23 +0100 | [diff] [blame] | 2165 | * current formats we can do this here rather than in |
| 2166 | * formatting. This may break if we get interesting formats. |
Mark Brown | fb2736b | 2011-07-24 21:30:55 +0100 | [diff] [blame] | 2167 | */ |
| 2168 | u8[0] |= map->read_flag_mask; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2169 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2170 | trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes); |
Mark Brown | f298536 | 2012-04-30 21:25:05 +0100 | [diff] [blame] | 2171 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2172 | ret = map->bus->read(map->bus_context, map->work_buf, |
| 2173 | map->format.reg_bytes + map->format.pad_bytes, |
| 2174 | val, val_len); |
| 2175 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2176 | trace_regmap_hw_read_done(map, reg, val_len / map->format.val_bytes); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2177 | |
| 2178 | return ret; |
| 2179 | } |
| 2180 | |
Boris BREZILLON | 3ac1703 | 2014-04-17 11:40:11 +0200 | [diff] [blame] | 2181 | static int _regmap_bus_reg_read(void *context, unsigned int reg, |
| 2182 | unsigned int *val) |
| 2183 | { |
| 2184 | struct regmap *map = context; |
| 2185 | |
| 2186 | return map->bus->reg_read(map->bus_context, reg, val); |
| 2187 | } |
| 2188 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2189 | static int _regmap_bus_read(void *context, unsigned int reg, |
| 2190 | unsigned int *val) |
| 2191 | { |
| 2192 | int ret; |
| 2193 | struct regmap *map = context; |
| 2194 | |
| 2195 | if (!map->format.parse_val) |
| 2196 | return -EINVAL; |
| 2197 | |
| 2198 | ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); |
| 2199 | if (ret == 0) |
| 2200 | *val = map->format.parse_val(map->work_buf); |
| 2201 | |
| 2202 | return ret; |
| 2203 | } |
| 2204 | |
| 2205 | static int _regmap_read(struct regmap *map, unsigned int reg, |
| 2206 | unsigned int *val) |
| 2207 | { |
| 2208 | int ret; |
| 2209 | void *context = _regmap_map_get_context(map); |
| 2210 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2211 | if (!map->cache_bypass) { |
| 2212 | ret = regcache_read(map, reg, val); |
| 2213 | if (ret == 0) |
| 2214 | return 0; |
| 2215 | } |
| 2216 | |
| 2217 | if (map->cache_only) |
| 2218 | return -EBUSY; |
| 2219 | |
Michal Simek | d4807ad | 2014-02-10 12:59:46 +0100 | [diff] [blame] | 2220 | if (!regmap_readable(map, reg)) |
| 2221 | return -EIO; |
| 2222 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2223 | ret = map->reg_read(context, reg, val); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2224 | if (ret == 0) { |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2225 | #ifdef LOG_DEVICE |
Pankaj Dubey | 5336be8 | 2014-09-27 09:47:55 +0530 | [diff] [blame] | 2226 | if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2227 | dev_info(map->dev, "%x => %x\n", reg, *val); |
| 2228 | #endif |
| 2229 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2230 | trace_regmap_reg_read(map, reg, *val); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2231 | |
Andrey Smirnov | ad27840 | 2013-01-12 12:54:12 -0800 | [diff] [blame] | 2232 | if (!map->cache_bypass) |
| 2233 | regcache_write(map, reg, *val); |
| 2234 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2235 | |
| 2236 | return ret; |
| 2237 | } |
| 2238 | |
| 2239 | /** |
| 2240 | * regmap_read(): Read a value from a single register |
| 2241 | * |
Gerhard Sittig | 0093380 | 2013-11-11 10:42:36 +0100 | [diff] [blame] | 2242 | * @map: Register map to read from |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2243 | * @reg: Register to be read from |
| 2244 | * @val: Pointer to store read value |
| 2245 | * |
| 2246 | * A value of zero will be returned on success, a negative errno will |
| 2247 | * be returned in error cases. |
| 2248 | */ |
| 2249 | int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) |
| 2250 | { |
| 2251 | int ret; |
| 2252 | |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2253 | if (reg % map->reg_stride) |
| 2254 | return -EINVAL; |
| 2255 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2256 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2257 | |
| 2258 | ret = _regmap_read(map, reg, val); |
| 2259 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2260 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2261 | |
| 2262 | return ret; |
| 2263 | } |
| 2264 | EXPORT_SYMBOL_GPL(regmap_read); |
| 2265 | |
| 2266 | /** |
| 2267 | * regmap_raw_read(): Read raw data from the device |
| 2268 | * |
Gerhard Sittig | 0093380 | 2013-11-11 10:42:36 +0100 | [diff] [blame] | 2269 | * @map: Register map to read from |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2270 | * @reg: First register to be read from |
| 2271 | * @val: Pointer to store read value |
| 2272 | * @val_len: Size of data to read |
| 2273 | * |
| 2274 | * A value of zero will be returned on success, a negative errno will |
| 2275 | * be returned in error cases. |
| 2276 | */ |
| 2277 | int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, |
| 2278 | size_t val_len) |
| 2279 | { |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2280 | size_t val_bytes = map->format.val_bytes; |
| 2281 | size_t val_count = val_len / val_bytes; |
| 2282 | unsigned int v; |
| 2283 | int ret, i; |
Mark Brown | 04e016a | 2011-10-09 13:35:43 +0100 | [diff] [blame] | 2284 | |
Andrey Smirnov | d2a5884 | 2013-01-27 10:49:05 -0800 | [diff] [blame] | 2285 | if (!map->bus) |
| 2286 | return -EINVAL; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 2287 | if (val_len % map->format.val_bytes) |
| 2288 | return -EINVAL; |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2289 | if (reg % map->reg_stride) |
| 2290 | return -EINVAL; |
Mark Brown | fa3eec7 | 2015-07-01 23:51:43 +0100 | [diff] [blame] | 2291 | if (val_count == 0) |
| 2292 | return -EINVAL; |
Stephen Warren | 851960b | 2012-04-06 15:16:03 -0600 | [diff] [blame] | 2293 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2294 | map->lock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2295 | |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2296 | if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass || |
| 2297 | map->cache_type == REGCACHE_NONE) { |
Markus Pargmann | 9a16ea9 | 2015-08-20 11:12:35 +0200 | [diff] [blame] | 2298 | if (!map->bus->read) { |
| 2299 | ret = -ENOTSUPP; |
| 2300 | goto out; |
| 2301 | } |
Markus Pargmann | c335931 | 2015-08-30 09:33:55 +0200 | [diff] [blame] | 2302 | if (map->max_raw_read && map->max_raw_read < val_len) { |
| 2303 | ret = -E2BIG; |
| 2304 | goto out; |
| 2305 | } |
Markus Pargmann | 9a16ea9 | 2015-08-20 11:12:35 +0200 | [diff] [blame] | 2306 | |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2307 | /* Physical block read if there's no cache involved */ |
| 2308 | ret = _regmap_raw_read(map, reg, val, val_len); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2309 | |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2310 | } else { |
| 2311 | /* Otherwise go word by word for the cache; should be low |
| 2312 | * cost as we expect to hit the cache. |
| 2313 | */ |
| 2314 | for (i = 0; i < val_count; i++) { |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2315 | ret = _regmap_read(map, reg + (i * map->reg_stride), |
| 2316 | &v); |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2317 | if (ret != 0) |
| 2318 | goto out; |
| 2319 | |
Marc Reilly | d939fb9 | 2012-03-16 12:11:43 +1100 | [diff] [blame] | 2320 | map->format.format_val(val + (i * val_bytes), v, 0); |
Mark Brown | b8fb5ab | 2012-02-21 19:12:47 +0000 | [diff] [blame] | 2321 | } |
| 2322 | } |
| 2323 | |
| 2324 | out: |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2325 | map->unlock(map->lock_arg); |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2326 | |
| 2327 | return ret; |
| 2328 | } |
| 2329 | EXPORT_SYMBOL_GPL(regmap_raw_read); |
| 2330 | |
| 2331 | /** |
Srinivas Kandagatla | 6725228 | 2013-06-11 13:18:15 +0100 | [diff] [blame] | 2332 | * regmap_field_read(): Read a value to a single register field |
| 2333 | * |
| 2334 | * @field: Register field to read from |
| 2335 | * @val: Pointer to store read value |
| 2336 | * |
| 2337 | * A value of zero will be returned on success, a negative errno will |
| 2338 | * be returned in error cases. |
| 2339 | */ |
| 2340 | int regmap_field_read(struct regmap_field *field, unsigned int *val) |
| 2341 | { |
| 2342 | int ret; |
| 2343 | unsigned int reg_val; |
| 2344 | ret = regmap_read(field->regmap, field->reg, ®_val); |
| 2345 | if (ret != 0) |
| 2346 | return ret; |
| 2347 | |
| 2348 | reg_val &= field->mask; |
| 2349 | reg_val >>= field->shift; |
| 2350 | *val = reg_val; |
| 2351 | |
| 2352 | return ret; |
| 2353 | } |
| 2354 | EXPORT_SYMBOL_GPL(regmap_field_read); |
| 2355 | |
| 2356 | /** |
Kuninori Morimoto | a010237 | 2013-09-01 20:30:50 -0700 | [diff] [blame] | 2357 | * regmap_fields_read(): Read a value to a single register field with port ID |
| 2358 | * |
| 2359 | * @field: Register field to read from |
| 2360 | * @id: port ID |
| 2361 | * @val: Pointer to store read value |
| 2362 | * |
| 2363 | * A value of zero will be returned on success, a negative errno will |
| 2364 | * be returned in error cases. |
| 2365 | */ |
| 2366 | int regmap_fields_read(struct regmap_field *field, unsigned int id, |
| 2367 | unsigned int *val) |
| 2368 | { |
| 2369 | int ret; |
| 2370 | unsigned int reg_val; |
| 2371 | |
| 2372 | if (id >= field->id_size) |
| 2373 | return -EINVAL; |
| 2374 | |
| 2375 | ret = regmap_read(field->regmap, |
| 2376 | field->reg + (field->id_offset * id), |
| 2377 | ®_val); |
| 2378 | if (ret != 0) |
| 2379 | return ret; |
| 2380 | |
| 2381 | reg_val &= field->mask; |
| 2382 | reg_val >>= field->shift; |
| 2383 | *val = reg_val; |
| 2384 | |
| 2385 | return ret; |
| 2386 | } |
| 2387 | EXPORT_SYMBOL_GPL(regmap_fields_read); |
| 2388 | |
| 2389 | /** |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2390 | * regmap_bulk_read(): Read multiple registers from the device |
| 2391 | * |
Gerhard Sittig | 0093380 | 2013-11-11 10:42:36 +0100 | [diff] [blame] | 2392 | * @map: Register map to read from |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2393 | * @reg: First register to be read from |
| 2394 | * @val: Pointer to store read value, in native register size for device |
| 2395 | * @val_count: Number of registers to read |
| 2396 | * |
| 2397 | * A value of zero will be returned on success, a negative errno will |
| 2398 | * be returned in error cases. |
| 2399 | */ |
| 2400 | int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, |
| 2401 | size_t val_count) |
| 2402 | { |
| 2403 | int ret, i; |
| 2404 | size_t val_bytes = map->format.val_bytes; |
Lars-Peter Clausen | 82cd996 | 2011-11-08 18:37:25 +0100 | [diff] [blame] | 2405 | bool vol = regmap_volatile_range(map, reg, val_count); |
Dimitris Papastamos | 5d1729e | 2011-09-19 14:34:05 +0100 | [diff] [blame] | 2406 | |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2407 | if (reg % map->reg_stride) |
| 2408 | return -EINVAL; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2409 | |
Stephen Boyd | 3b58ee1 | 2013-12-13 09:14:07 -0800 | [diff] [blame] | 2410 | if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) { |
Ashish Jangam | 2e33caf | 2012-04-30 23:23:40 +0100 | [diff] [blame] | 2411 | /* |
| 2412 | * Some devices does not support bulk read, for |
| 2413 | * them we have a series of single read operations. |
| 2414 | */ |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 2415 | size_t total_size = val_bytes * val_count; |
| 2416 | |
| 2417 | if (!map->use_single_read && |
| 2418 | (!map->max_raw_read || map->max_raw_read > total_size)) { |
Ashish Jangam | 2e33caf | 2012-04-30 23:23:40 +0100 | [diff] [blame] | 2419 | ret = regmap_raw_read(map, reg, val, |
| 2420 | val_bytes * val_count); |
| 2421 | if (ret != 0) |
| 2422 | return ret; |
Markus Pargmann | adaac45 | 2015-08-30 09:33:53 +0200 | [diff] [blame] | 2423 | } else { |
| 2424 | /* |
| 2425 | * Some devices do not support bulk read or do not |
| 2426 | * support large bulk reads, for them we have a series |
| 2427 | * of read operations. |
| 2428 | */ |
| 2429 | int chunk_stride = map->reg_stride; |
| 2430 | size_t chunk_size = val_bytes; |
| 2431 | size_t chunk_count = val_count; |
| 2432 | |
| 2433 | if (!map->use_single_read) { |
| 2434 | chunk_size = map->max_raw_read; |
| 2435 | if (chunk_size % val_bytes) |
| 2436 | chunk_size -= chunk_size % val_bytes; |
| 2437 | chunk_count = total_size / chunk_size; |
| 2438 | chunk_stride *= chunk_size / val_bytes; |
| 2439 | } |
| 2440 | |
| 2441 | /* Read bytes that fit into a multiple of chunk_size */ |
| 2442 | for (i = 0; i < chunk_count; i++) { |
| 2443 | ret = regmap_raw_read(map, |
| 2444 | reg + (i * chunk_stride), |
| 2445 | val + (i * chunk_size), |
| 2446 | chunk_size); |
| 2447 | if (ret != 0) |
| 2448 | return ret; |
| 2449 | } |
| 2450 | |
| 2451 | /* Read remaining bytes */ |
| 2452 | if (chunk_size * i < total_size) { |
| 2453 | ret = regmap_raw_read(map, |
| 2454 | reg + (i * chunk_stride), |
| 2455 | val + (i * chunk_size), |
| 2456 | total_size - i * chunk_size); |
| 2457 | if (ret != 0) |
| 2458 | return ret; |
| 2459 | } |
Ashish Jangam | 2e33caf | 2012-04-30 23:23:40 +0100 | [diff] [blame] | 2460 | } |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2461 | |
| 2462 | for (i = 0; i < val_count * val_bytes; i += val_bytes) |
Mark Brown | 8a819ff | 2013-03-04 09:04:51 +0800 | [diff] [blame] | 2463 | map->format.parse_inplace(val + i); |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2464 | } else { |
| 2465 | for (i = 0; i < val_count; i++) { |
Laxman Dewangan | 6560ffd | 2012-05-09 17:43:12 +0530 | [diff] [blame] | 2466 | unsigned int ival; |
Stephen Warren | f01ee60 | 2012-04-09 13:40:24 -0600 | [diff] [blame] | 2467 | ret = regmap_read(map, reg + (i * map->reg_stride), |
Mark Brown | 25061d2 | 2012-05-12 13:06:08 +0100 | [diff] [blame] | 2468 | &ival); |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2469 | if (ret != 0) |
| 2470 | return ret; |
Mark Brown | d5b98eb | 2015-08-28 20:04:53 +0100 | [diff] [blame] | 2471 | |
| 2472 | if (map->format.format_val) { |
| 2473 | map->format.format_val(val + (i * val_bytes), ival, 0); |
| 2474 | } else { |
| 2475 | /* Devices providing read and write |
| 2476 | * operations can use the bulk I/O |
| 2477 | * functions if they define a val_bytes, |
| 2478 | * we assume that the values are native |
| 2479 | * endian. |
| 2480 | */ |
| 2481 | u32 *u32 = val; |
| 2482 | u16 *u16 = val; |
| 2483 | u8 *u8 = val; |
| 2484 | |
| 2485 | switch (map->format.val_bytes) { |
| 2486 | case 4: |
| 2487 | u32[i] = ival; |
| 2488 | break; |
| 2489 | case 2: |
| 2490 | u16[i] = ival; |
| 2491 | break; |
| 2492 | case 1: |
| 2493 | u8[i] = ival; |
| 2494 | break; |
| 2495 | default: |
| 2496 | return -EINVAL; |
| 2497 | } |
| 2498 | } |
Mark Brown | de2d808 | 2011-10-10 13:24:52 +0100 | [diff] [blame] | 2499 | } |
| 2500 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2501 | |
| 2502 | return 0; |
| 2503 | } |
| 2504 | EXPORT_SYMBOL_GPL(regmap_bulk_read); |
| 2505 | |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2506 | static int _regmap_update_bits(struct regmap *map, unsigned int reg, |
| 2507 | unsigned int mask, unsigned int val, |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 2508 | bool *change, bool force_write) |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2509 | { |
| 2510 | int ret; |
Mark Brown | d91e8db | 2011-11-18 16:03:50 +0000 | [diff] [blame] | 2511 | unsigned int tmp, orig; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2512 | |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame^] | 2513 | if (change) |
| 2514 | *change = false; |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2515 | |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame^] | 2516 | if (regmap_volatile(map, reg) && map->reg_update_bits) { |
| 2517 | ret = map->reg_update_bits(map->bus_context, reg, mask, val); |
| 2518 | if (ret == 0 && change) |
Xiubo Li | e2f74dc | 2014-02-20 08:50:10 +0800 | [diff] [blame] | 2519 | *change = true; |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2520 | } else { |
Jon Ringle | 77792b1 | 2015-10-01 12:38:07 -0400 | [diff] [blame^] | 2521 | ret = _regmap_read(map, reg, &orig); |
| 2522 | if (ret != 0) |
| 2523 | return ret; |
| 2524 | |
| 2525 | tmp = orig & ~mask; |
| 2526 | tmp |= val & mask; |
| 2527 | |
| 2528 | if (force_write || (tmp != orig)) { |
| 2529 | ret = _regmap_write(map, reg, tmp); |
| 2530 | if (ret == 0 && change) |
| 2531 | *change = true; |
| 2532 | } |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2533 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2534 | |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2535 | return ret; |
| 2536 | } |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2537 | |
| 2538 | /** |
| 2539 | * regmap_update_bits: Perform a read/modify/write cycle on the register map |
| 2540 | * |
| 2541 | * @map: Register map to update |
| 2542 | * @reg: Register to update |
| 2543 | * @mask: Bitmask to change |
| 2544 | * @val: New value for bitmask |
| 2545 | * |
| 2546 | * Returns zero for success, a negative number on error. |
| 2547 | */ |
| 2548 | int regmap_update_bits(struct regmap *map, unsigned int reg, |
| 2549 | unsigned int mask, unsigned int val) |
| 2550 | { |
Krystian Garbaciak | fc3ebd7 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 2551 | int ret; |
| 2552 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2553 | map->lock(map->lock_arg); |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 2554 | ret = _regmap_update_bits(map, reg, mask, val, NULL, false); |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2555 | map->unlock(map->lock_arg); |
Krystian Garbaciak | fc3ebd7 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 2556 | |
| 2557 | return ret; |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2558 | } |
Mark Brown | b83a313 | 2011-05-11 19:59:58 +0200 | [diff] [blame] | 2559 | EXPORT_SYMBOL_GPL(regmap_update_bits); |
Mark Brown | 31244e3 | 2011-07-20 22:56:53 +0100 | [diff] [blame] | 2560 | |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2561 | /** |
Kuninori Morimoto | fd4b7286c | 2015-06-16 08:52:39 +0000 | [diff] [blame] | 2562 | * regmap_write_bits: Perform a read/modify/write cycle on the register map |
| 2563 | * |
| 2564 | * @map: Register map to update |
| 2565 | * @reg: Register to update |
| 2566 | * @mask: Bitmask to change |
| 2567 | * @val: New value for bitmask |
| 2568 | * |
| 2569 | * Returns zero for success, a negative number on error. |
| 2570 | */ |
| 2571 | int regmap_write_bits(struct regmap *map, unsigned int reg, |
| 2572 | unsigned int mask, unsigned int val) |
| 2573 | { |
| 2574 | int ret; |
| 2575 | |
| 2576 | map->lock(map->lock_arg); |
| 2577 | ret = _regmap_update_bits(map, reg, mask, val, NULL, true); |
| 2578 | map->unlock(map->lock_arg); |
| 2579 | |
| 2580 | return ret; |
| 2581 | } |
| 2582 | EXPORT_SYMBOL_GPL(regmap_write_bits); |
| 2583 | |
| 2584 | /** |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2585 | * regmap_update_bits_async: Perform a read/modify/write cycle on the register |
| 2586 | * map asynchronously |
| 2587 | * |
| 2588 | * @map: Register map to update |
| 2589 | * @reg: Register to update |
| 2590 | * @mask: Bitmask to change |
| 2591 | * @val: New value for bitmask |
| 2592 | * |
| 2593 | * With most buses the read must be done synchronously so this is most |
| 2594 | * useful for devices with a cache which do not need to interact with |
| 2595 | * the hardware to determine the current register value. |
| 2596 | * |
| 2597 | * Returns zero for success, a negative number on error. |
| 2598 | */ |
| 2599 | int regmap_update_bits_async(struct regmap *map, unsigned int reg, |
| 2600 | unsigned int mask, unsigned int val) |
| 2601 | { |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2602 | int ret; |
| 2603 | |
| 2604 | map->lock(map->lock_arg); |
| 2605 | |
| 2606 | map->async = true; |
| 2607 | |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 2608 | ret = _regmap_update_bits(map, reg, mask, val, NULL, false); |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2609 | |
| 2610 | map->async = false; |
| 2611 | |
| 2612 | map->unlock(map->lock_arg); |
| 2613 | |
| 2614 | return ret; |
| 2615 | } |
| 2616 | EXPORT_SYMBOL_GPL(regmap_update_bits_async); |
| 2617 | |
| 2618 | /** |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2619 | * regmap_update_bits_check: Perform a read/modify/write cycle on the |
| 2620 | * register map and report if updated |
| 2621 | * |
| 2622 | * @map: Register map to update |
| 2623 | * @reg: Register to update |
| 2624 | * @mask: Bitmask to change |
| 2625 | * @val: New value for bitmask |
| 2626 | * @change: Boolean indicating if a write was done |
| 2627 | * |
| 2628 | * Returns zero for success, a negative number on error. |
| 2629 | */ |
| 2630 | int regmap_update_bits_check(struct regmap *map, unsigned int reg, |
| 2631 | unsigned int mask, unsigned int val, |
| 2632 | bool *change) |
| 2633 | { |
Krystian Garbaciak | fc3ebd7 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 2634 | int ret; |
| 2635 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2636 | map->lock(map->lock_arg); |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 2637 | ret = _regmap_update_bits(map, reg, mask, val, change, false); |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2638 | map->unlock(map->lock_arg); |
Krystian Garbaciak | fc3ebd7 | 2012-06-15 11:23:56 +0100 | [diff] [blame] | 2639 | return ret; |
Mark Brown | 018690d | 2011-11-29 20:10:36 +0000 | [diff] [blame] | 2640 | } |
| 2641 | EXPORT_SYMBOL_GPL(regmap_update_bits_check); |
| 2642 | |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2643 | /** |
| 2644 | * regmap_update_bits_check_async: Perform a read/modify/write cycle on the |
| 2645 | * register map asynchronously and report if |
| 2646 | * updated |
| 2647 | * |
| 2648 | * @map: Register map to update |
| 2649 | * @reg: Register to update |
| 2650 | * @mask: Bitmask to change |
| 2651 | * @val: New value for bitmask |
| 2652 | * @change: Boolean indicating if a write was done |
| 2653 | * |
| 2654 | * With most buses the read must be done synchronously so this is most |
| 2655 | * useful for devices with a cache which do not need to interact with |
| 2656 | * the hardware to determine the current register value. |
| 2657 | * |
| 2658 | * Returns zero for success, a negative number on error. |
| 2659 | */ |
| 2660 | int regmap_update_bits_check_async(struct regmap *map, unsigned int reg, |
| 2661 | unsigned int mask, unsigned int val, |
| 2662 | bool *change) |
| 2663 | { |
| 2664 | int ret; |
| 2665 | |
| 2666 | map->lock(map->lock_arg); |
| 2667 | |
| 2668 | map->async = true; |
| 2669 | |
Kuninori Morimoto | 7ff0589 | 2015-06-16 08:52:22 +0000 | [diff] [blame] | 2670 | ret = _regmap_update_bits(map, reg, mask, val, change, false); |
Mark Brown | 915f441 | 2013-10-09 13:30:10 +0100 | [diff] [blame] | 2671 | |
| 2672 | map->async = false; |
| 2673 | |
| 2674 | map->unlock(map->lock_arg); |
| 2675 | |
| 2676 | return ret; |
| 2677 | } |
| 2678 | EXPORT_SYMBOL_GPL(regmap_update_bits_check_async); |
| 2679 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2680 | void regmap_async_complete_cb(struct regmap_async *async, int ret) |
| 2681 | { |
| 2682 | struct regmap *map = async->map; |
| 2683 | bool wake; |
| 2684 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2685 | trace_regmap_async_io_complete(map); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 2686 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2687 | spin_lock(&map->async_lock); |
Mark Brown | 7e09a97 | 2013-10-07 23:00:24 +0100 | [diff] [blame] | 2688 | list_move(&async->list, &map->async_free); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2689 | wake = list_empty(&map->async_list); |
| 2690 | |
| 2691 | if (ret != 0) |
| 2692 | map->async_ret = ret; |
| 2693 | |
| 2694 | spin_unlock(&map->async_lock); |
| 2695 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2696 | if (wake) |
| 2697 | wake_up(&map->async_waitq); |
| 2698 | } |
Axel Lin | f804fb5 | 2013-02-03 00:14:13 +0800 | [diff] [blame] | 2699 | EXPORT_SYMBOL_GPL(regmap_async_complete_cb); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2700 | |
| 2701 | static int regmap_async_is_done(struct regmap *map) |
| 2702 | { |
| 2703 | unsigned long flags; |
| 2704 | int ret; |
| 2705 | |
| 2706 | spin_lock_irqsave(&map->async_lock, flags); |
| 2707 | ret = list_empty(&map->async_list); |
| 2708 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 2709 | |
| 2710 | return ret; |
| 2711 | } |
| 2712 | |
| 2713 | /** |
| 2714 | * regmap_async_complete: Ensure all asynchronous I/O has completed. |
| 2715 | * |
| 2716 | * @map: Map to operate on. |
| 2717 | * |
| 2718 | * Blocks until any pending asynchronous I/O has completed. Returns |
| 2719 | * an error code for any failed I/O operations. |
| 2720 | */ |
| 2721 | int regmap_async_complete(struct regmap *map) |
| 2722 | { |
| 2723 | unsigned long flags; |
| 2724 | int ret; |
| 2725 | |
| 2726 | /* Nothing to do with no async support */ |
Daniel Mack | f2e055e | 2013-07-04 13:11:03 +0200 | [diff] [blame] | 2727 | if (!map->bus || !map->bus->async_write) |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2728 | return 0; |
| 2729 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2730 | trace_regmap_async_complete_start(map); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 2731 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2732 | wait_event(map->async_waitq, regmap_async_is_done(map)); |
| 2733 | |
| 2734 | spin_lock_irqsave(&map->async_lock, flags); |
| 2735 | ret = map->async_ret; |
| 2736 | map->async_ret = 0; |
| 2737 | spin_unlock_irqrestore(&map->async_lock, flags); |
| 2738 | |
Philipp Zabel | c6b570d | 2015-03-09 12:20:13 +0100 | [diff] [blame] | 2739 | trace_regmap_async_complete_done(map); |
Mark Brown | fe7d4cc | 2013-02-21 19:05:48 +0000 | [diff] [blame] | 2740 | |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2741 | return ret; |
| 2742 | } |
Mark Brown | f88948e | 2013-02-05 13:53:26 +0000 | [diff] [blame] | 2743 | EXPORT_SYMBOL_GPL(regmap_async_complete); |
Mark Brown | 0d509f2 | 2013-01-27 22:07:38 +0800 | [diff] [blame] | 2744 | |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2745 | /** |
| 2746 | * regmap_register_patch: Register and apply register updates to be applied |
| 2747 | * on device initialistion |
| 2748 | * |
| 2749 | * @map: Register map to apply updates to. |
| 2750 | * @regs: Values to update. |
| 2751 | * @num_regs: Number of entries in regs. |
| 2752 | * |
| 2753 | * Register a set of register updates to be applied to the device |
| 2754 | * whenever the device registers are synchronised with the cache and |
| 2755 | * apply them immediately. Typically this is used to apply |
| 2756 | * corrections to be applied to the device defaults on startup, such |
| 2757 | * as the updates some vendors provide to undocumented registers. |
Mark Brown | 56fb1c7 | 2014-03-18 10:53:26 +0000 | [diff] [blame] | 2758 | * |
| 2759 | * The caller must ensure that this function cannot be called |
| 2760 | * concurrently with either itself or regcache_sync(). |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2761 | */ |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2762 | int regmap_register_patch(struct regmap *map, const struct reg_sequence *regs, |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2763 | int num_regs) |
| 2764 | { |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2765 | struct reg_sequence *p; |
Charles Keepax | 6bf1310 | 2014-02-25 13:45:51 +0000 | [diff] [blame] | 2766 | int ret; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2767 | bool bypass; |
| 2768 | |
Cai Zhiyong | bd60e38 | 2013-11-18 20:21:49 +0800 | [diff] [blame] | 2769 | if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n", |
| 2770 | num_regs)) |
| 2771 | return 0; |
| 2772 | |
Mark Brown | aab13eb | 2013-07-11 12:41:44 +0100 | [diff] [blame] | 2773 | p = krealloc(map->patch, |
Nariman Poushin | 8019ff6 | 2015-07-16 16:36:21 +0100 | [diff] [blame] | 2774 | sizeof(struct reg_sequence) * (map->patch_regs + num_regs), |
Mark Brown | aab13eb | 2013-07-11 12:41:44 +0100 | [diff] [blame] | 2775 | GFP_KERNEL); |
| 2776 | if (p) { |
| 2777 | memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs)); |
| 2778 | map->patch = p; |
| 2779 | map->patch_regs += num_regs; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2780 | } else { |
Mark Brown | 56fb1c7 | 2014-03-18 10:53:26 +0000 | [diff] [blame] | 2781 | return -ENOMEM; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2782 | } |
| 2783 | |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2784 | map->lock(map->lock_arg); |
| 2785 | |
| 2786 | bypass = map->cache_bypass; |
| 2787 | |
| 2788 | map->cache_bypass = true; |
| 2789 | map->async = true; |
| 2790 | |
Charles Keepax | 6bf1310 | 2014-02-25 13:45:51 +0000 | [diff] [blame] | 2791 | ret = _regmap_multi_reg_write(map, regs, num_regs); |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2792 | |
Mark Brown | 1a25f26 | 2013-10-10 20:55:03 +0100 | [diff] [blame] | 2793 | map->async = false; |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2794 | map->cache_bypass = bypass; |
| 2795 | |
Davide Ciminaghi | 0d4529c | 2012-10-16 15:56:59 +0200 | [diff] [blame] | 2796 | map->unlock(map->lock_arg); |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2797 | |
Mark Brown | 1a25f26 | 2013-10-10 20:55:03 +0100 | [diff] [blame] | 2798 | regmap_async_complete(map); |
| 2799 | |
Mark Brown | 22f0d90 | 2012-01-21 12:01:14 +0000 | [diff] [blame] | 2800 | return ret; |
| 2801 | } |
| 2802 | EXPORT_SYMBOL_GPL(regmap_register_patch); |
| 2803 | |
Mark Brown | eae4b51 | 2012-03-14 13:15:03 +0000 | [diff] [blame] | 2804 | /* |
Mark Brown | a6539c3 | 2012-02-17 14:20:14 -0800 | [diff] [blame] | 2805 | * regmap_get_val_bytes(): Report the size of a register value |
| 2806 | * |
| 2807 | * Report the size of a register value, mainly intended to for use by |
| 2808 | * generic infrastructure built on top of regmap. |
| 2809 | */ |
| 2810 | int regmap_get_val_bytes(struct regmap *map) |
| 2811 | { |
| 2812 | if (map->format.format_write) |
| 2813 | return -EINVAL; |
| 2814 | |
| 2815 | return map->format.val_bytes; |
| 2816 | } |
| 2817 | EXPORT_SYMBOL_GPL(regmap_get_val_bytes); |
| 2818 | |
Srinivas Kandagatla | 668abc7 | 2015-05-21 17:42:43 +0100 | [diff] [blame] | 2819 | /** |
| 2820 | * regmap_get_max_register(): Report the max register value |
| 2821 | * |
| 2822 | * Report the max register value, mainly intended to for use by |
| 2823 | * generic infrastructure built on top of regmap. |
| 2824 | */ |
| 2825 | int regmap_get_max_register(struct regmap *map) |
| 2826 | { |
| 2827 | return map->max_register ? map->max_register : -EINVAL; |
| 2828 | } |
| 2829 | EXPORT_SYMBOL_GPL(regmap_get_max_register); |
| 2830 | |
Srinivas Kandagatla | a2f776c | 2015-05-21 17:42:54 +0100 | [diff] [blame] | 2831 | /** |
| 2832 | * regmap_get_reg_stride(): Report the register address stride |
| 2833 | * |
| 2834 | * Report the register address stride, mainly intended to for use by |
| 2835 | * generic infrastructure built on top of regmap. |
| 2836 | */ |
| 2837 | int regmap_get_reg_stride(struct regmap *map) |
| 2838 | { |
| 2839 | return map->reg_stride; |
| 2840 | } |
| 2841 | EXPORT_SYMBOL_GPL(regmap_get_reg_stride); |
| 2842 | |
Nenghua Cao | 13ff50c | 2014-02-19 18:44:13 +0800 | [diff] [blame] | 2843 | int regmap_parse_val(struct regmap *map, const void *buf, |
| 2844 | unsigned int *val) |
| 2845 | { |
| 2846 | if (!map->format.parse_val) |
| 2847 | return -EINVAL; |
| 2848 | |
| 2849 | *val = map->format.parse_val(buf); |
| 2850 | |
| 2851 | return 0; |
| 2852 | } |
| 2853 | EXPORT_SYMBOL_GPL(regmap_parse_val); |
| 2854 | |
Mark Brown | 31244e3 | 2011-07-20 22:56:53 +0100 | [diff] [blame] | 2855 | static int __init regmap_initcall(void) |
| 2856 | { |
| 2857 | regmap_debugfs_initcall(); |
| 2858 | |
| 2859 | return 0; |
| 2860 | } |
| 2861 | postcore_initcall(regmap_initcall); |