Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Hardware monitoring driver for PMBus devices |
| 3 | * |
| 4 | * Copyright (c) 2010, 2011 Ericsson AB. |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 5 | * Copyright (c) 2012 Guenter Roeck |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/err.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/i2c.h> |
| 28 | #include <linux/hwmon.h> |
| 29 | #include <linux/hwmon-sysfs.h> |
Jean Delvare | dcd8f39 | 2012-10-10 15:25:56 +0200 | [diff] [blame] | 30 | #include <linux/jiffies.h> |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 31 | #include <linux/i2c/pmbus.h> |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 32 | #include <linux/regulator/driver.h> |
| 33 | #include <linux/regulator/machine.h> |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 34 | #include "pmbus.h" |
| 35 | |
| 36 | /* |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 37 | * Number of additional attribute pointers to allocate |
| 38 | * with each call to krealloc |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 39 | */ |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 40 | #define PMBUS_ATTR_ALLOC_SIZE 32 |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 41 | |
| 42 | /* |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 43 | * Index into status register array, per status register group |
| 44 | */ |
| 45 | #define PB_STATUS_BASE 0 |
| 46 | #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) |
| 47 | #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) |
| 48 | #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) |
| 49 | #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 50 | #define PB_STATUS_TEMP_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) |
| 51 | #define PB_STATUS_INPUT_BASE (PB_STATUS_TEMP_BASE + PMBUS_PAGES) |
| 52 | #define PB_STATUS_VMON_BASE (PB_STATUS_INPUT_BASE + 1) |
| 53 | |
| 54 | #define PB_NUM_STATUS_REG (PB_STATUS_VMON_BASE + 1) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 55 | |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 56 | #define PMBUS_NAME_SIZE 24 |
| 57 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 58 | struct pmbus_sensor { |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 59 | struct pmbus_sensor *next; |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 60 | char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */ |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 61 | struct device_attribute attribute; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 62 | u8 page; /* page number */ |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 63 | u16 reg; /* register */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 64 | enum pmbus_sensor_classes class; /* sensor class */ |
| 65 | bool update; /* runtime sensor update needed */ |
| 66 | int data; /* Sensor data. |
| 67 | Negative if there was a read error */ |
| 68 | }; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 69 | #define to_pmbus_sensor(_attr) \ |
| 70 | container_of(_attr, struct pmbus_sensor, attribute) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 71 | |
| 72 | struct pmbus_boolean { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 73 | char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 74 | struct sensor_device_attribute attribute; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 75 | struct pmbus_sensor *s1; |
| 76 | struct pmbus_sensor *s2; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 77 | }; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 78 | #define to_pmbus_boolean(_attr) \ |
| 79 | container_of(_attr, struct pmbus_boolean, attribute) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 80 | |
| 81 | struct pmbus_label { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 82 | char name[PMBUS_NAME_SIZE]; /* sysfs label name */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 83 | struct device_attribute attribute; |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 84 | char label[PMBUS_NAME_SIZE]; /* label */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 85 | }; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 86 | #define to_pmbus_label(_attr) \ |
| 87 | container_of(_attr, struct pmbus_label, attribute) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 88 | |
| 89 | struct pmbus_data { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 90 | struct device *dev; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 91 | struct device *hwmon_dev; |
| 92 | |
| 93 | u32 flags; /* from platform data */ |
| 94 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 95 | int exponent[PMBUS_PAGES]; |
| 96 | /* linear mode: exponent for output voltages */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 97 | |
| 98 | const struct pmbus_driver_info *info; |
| 99 | |
| 100 | int max_attributes; |
| 101 | int num_attributes; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 102 | struct attribute_group group; |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 103 | const struct attribute_group *groups[2]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 104 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 105 | struct pmbus_sensor *sensors; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 106 | |
| 107 | struct mutex update_lock; |
| 108 | bool valid; |
| 109 | unsigned long last_updated; /* in jiffies */ |
| 110 | |
| 111 | /* |
| 112 | * A single status register covers multiple attributes, |
| 113 | * so we keep them all together. |
| 114 | */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 115 | u8 status[PB_NUM_STATUS_REG]; |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 116 | u8 status_register; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 117 | |
| 118 | u8 currpage; |
| 119 | }; |
| 120 | |
Guenter Roeck | ce603b1 | 2013-01-26 15:15:37 -0800 | [diff] [blame] | 121 | void pmbus_clear_cache(struct i2c_client *client) |
| 122 | { |
| 123 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 124 | |
| 125 | data->valid = false; |
| 126 | } |
| 127 | EXPORT_SYMBOL_GPL(pmbus_clear_cache); |
| 128 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 129 | int pmbus_set_page(struct i2c_client *client, u8 page) |
| 130 | { |
| 131 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 132 | int rv = 0; |
| 133 | int newpage; |
| 134 | |
| 135 | if (page != data->currpage) { |
| 136 | rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); |
| 137 | newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); |
| 138 | if (newpage != page) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 139 | rv = -EIO; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 140 | else |
| 141 | data->currpage = page; |
| 142 | } |
| 143 | return rv; |
| 144 | } |
| 145 | EXPORT_SYMBOL_GPL(pmbus_set_page); |
| 146 | |
Guenter Roeck | 03e9bd8 | 2011-07-08 10:43:57 -0700 | [diff] [blame] | 147 | int pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 148 | { |
| 149 | int rv; |
| 150 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 151 | if (page >= 0) { |
| 152 | rv = pmbus_set_page(client, page); |
| 153 | if (rv < 0) |
| 154 | return rv; |
| 155 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 156 | |
| 157 | return i2c_smbus_write_byte(client, value); |
| 158 | } |
Guenter Roeck | 03e9bd8 | 2011-07-08 10:43:57 -0700 | [diff] [blame] | 159 | EXPORT_SYMBOL_GPL(pmbus_write_byte); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 160 | |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 161 | /* |
| 162 | * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if |
LABBE Corentin | 84fb029 | 2013-09-27 14:36:04 +0200 | [diff] [blame] | 163 | * a device specific mapping function exists and calls it if necessary. |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 164 | */ |
| 165 | static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
| 166 | { |
| 167 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 168 | const struct pmbus_driver_info *info = data->info; |
| 169 | int status; |
| 170 | |
| 171 | if (info->write_byte) { |
| 172 | status = info->write_byte(client, page, value); |
| 173 | if (status != -ENODATA) |
| 174 | return status; |
| 175 | } |
| 176 | return pmbus_write_byte(client, page, value); |
| 177 | } |
| 178 | |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 179 | int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 180 | { |
| 181 | int rv; |
| 182 | |
| 183 | rv = pmbus_set_page(client, page); |
| 184 | if (rv < 0) |
| 185 | return rv; |
| 186 | |
| 187 | return i2c_smbus_write_word_data(client, reg, word); |
| 188 | } |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 189 | EXPORT_SYMBOL_GPL(pmbus_write_word_data); |
| 190 | |
| 191 | /* |
| 192 | * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if |
| 193 | * a device specific mapping function exists and calls it if necessary. |
| 194 | */ |
| 195 | static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, |
| 196 | u16 word) |
| 197 | { |
| 198 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 199 | const struct pmbus_driver_info *info = data->info; |
| 200 | int status; |
| 201 | |
| 202 | if (info->write_word_data) { |
| 203 | status = info->write_word_data(client, page, reg, word); |
| 204 | if (status != -ENODATA) |
| 205 | return status; |
| 206 | } |
| 207 | if (reg >= PMBUS_VIRT_BASE) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 208 | return -ENXIO; |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 209 | return pmbus_write_word_data(client, page, reg, word); |
| 210 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 211 | |
| 212 | int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) |
| 213 | { |
| 214 | int rv; |
| 215 | |
| 216 | rv = pmbus_set_page(client, page); |
| 217 | if (rv < 0) |
| 218 | return rv; |
| 219 | |
| 220 | return i2c_smbus_read_word_data(client, reg); |
| 221 | } |
| 222 | EXPORT_SYMBOL_GPL(pmbus_read_word_data); |
| 223 | |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 224 | /* |
| 225 | * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if |
| 226 | * a device specific mapping function exists and calls it if necessary. |
| 227 | */ |
| 228 | static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg) |
| 229 | { |
| 230 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 231 | const struct pmbus_driver_info *info = data->info; |
| 232 | int status; |
| 233 | |
| 234 | if (info->read_word_data) { |
| 235 | status = info->read_word_data(client, page, reg); |
| 236 | if (status != -ENODATA) |
| 237 | return status; |
| 238 | } |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 239 | if (reg >= PMBUS_VIRT_BASE) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 240 | return -ENXIO; |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 241 | return pmbus_read_word_data(client, page, reg); |
| 242 | } |
| 243 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 244 | int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 245 | { |
| 246 | int rv; |
| 247 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 248 | if (page >= 0) { |
| 249 | rv = pmbus_set_page(client, page); |
| 250 | if (rv < 0) |
| 251 | return rv; |
| 252 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 253 | |
| 254 | return i2c_smbus_read_byte_data(client, reg); |
| 255 | } |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 256 | EXPORT_SYMBOL_GPL(pmbus_read_byte_data); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 257 | |
Alan Tull | 11c1199 | 2014-10-15 13:55:08 -0500 | [diff] [blame] | 258 | int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value) |
| 259 | { |
| 260 | int rv; |
| 261 | |
| 262 | rv = pmbus_set_page(client, page); |
| 263 | if (rv < 0) |
| 264 | return rv; |
| 265 | |
| 266 | return i2c_smbus_write_byte_data(client, reg, value); |
| 267 | } |
| 268 | EXPORT_SYMBOL_GPL(pmbus_write_byte_data); |
| 269 | |
| 270 | int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, |
| 271 | u8 mask, u8 value) |
| 272 | { |
| 273 | unsigned int tmp; |
| 274 | int rv; |
| 275 | |
| 276 | rv = pmbus_read_byte_data(client, page, reg); |
| 277 | if (rv < 0) |
| 278 | return rv; |
| 279 | |
| 280 | tmp = (rv & ~mask) | (value & mask); |
| 281 | |
| 282 | if (tmp != rv) |
| 283 | rv = pmbus_write_byte_data(client, page, reg, tmp); |
| 284 | |
| 285 | return rv; |
| 286 | } |
| 287 | EXPORT_SYMBOL_GPL(pmbus_update_byte_data); |
| 288 | |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 289 | /* |
| 290 | * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if |
| 291 | * a device specific mapping function exists and calls it if necessary. |
| 292 | */ |
| 293 | static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) |
| 294 | { |
| 295 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 296 | const struct pmbus_driver_info *info = data->info; |
| 297 | int status; |
| 298 | |
| 299 | if (info->read_byte_data) { |
| 300 | status = info->read_byte_data(client, page, reg); |
| 301 | if (status != -ENODATA) |
| 302 | return status; |
| 303 | } |
| 304 | return pmbus_read_byte_data(client, page, reg); |
| 305 | } |
| 306 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 307 | static void pmbus_clear_fault_page(struct i2c_client *client, int page) |
| 308 | { |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 309 | _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | void pmbus_clear_faults(struct i2c_client *client) |
| 313 | { |
| 314 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 315 | int i; |
| 316 | |
| 317 | for (i = 0; i < data->info->pages; i++) |
| 318 | pmbus_clear_fault_page(client, i); |
| 319 | } |
| 320 | EXPORT_SYMBOL_GPL(pmbus_clear_faults); |
| 321 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 322 | static int pmbus_check_status_cml(struct i2c_client *client) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 323 | { |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 324 | struct pmbus_data *data = i2c_get_clientdata(client); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 325 | int status, status2; |
| 326 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 327 | status = _pmbus_read_byte_data(client, -1, data->status_register); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 328 | if (status < 0 || (status & PB_STATUS_CML)) { |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 329 | status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 330 | if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 331 | return -EIO; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 332 | } |
| 333 | return 0; |
| 334 | } |
| 335 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 336 | static bool pmbus_check_register(struct i2c_client *client, |
| 337 | int (*func)(struct i2c_client *client, |
| 338 | int page, int reg), |
| 339 | int page, int reg) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 340 | { |
| 341 | int rv; |
| 342 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 343 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 344 | rv = func(client, page, reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 345 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 346 | rv = pmbus_check_status_cml(client); |
| 347 | pmbus_clear_fault_page(client, -1); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 348 | return rv >= 0; |
| 349 | } |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 350 | |
| 351 | bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) |
| 352 | { |
| 353 | return pmbus_check_register(client, _pmbus_read_byte_data, page, reg); |
| 354 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 355 | EXPORT_SYMBOL_GPL(pmbus_check_byte_register); |
| 356 | |
| 357 | bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) |
| 358 | { |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 359 | return pmbus_check_register(client, _pmbus_read_word_data, page, reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 360 | } |
| 361 | EXPORT_SYMBOL_GPL(pmbus_check_word_register); |
| 362 | |
| 363 | const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) |
| 364 | { |
| 365 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 366 | |
| 367 | return data->info; |
| 368 | } |
| 369 | EXPORT_SYMBOL_GPL(pmbus_get_driver_info); |
| 370 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 371 | static struct _pmbus_status { |
| 372 | u32 func; |
| 373 | u16 base; |
| 374 | u16 reg; |
| 375 | } pmbus_status[] = { |
| 376 | { PMBUS_HAVE_STATUS_VOUT, PB_STATUS_VOUT_BASE, PMBUS_STATUS_VOUT }, |
| 377 | { PMBUS_HAVE_STATUS_IOUT, PB_STATUS_IOUT_BASE, PMBUS_STATUS_IOUT }, |
| 378 | { PMBUS_HAVE_STATUS_TEMP, PB_STATUS_TEMP_BASE, |
| 379 | PMBUS_STATUS_TEMPERATURE }, |
| 380 | { PMBUS_HAVE_STATUS_FAN12, PB_STATUS_FAN_BASE, PMBUS_STATUS_FAN_12 }, |
| 381 | { PMBUS_HAVE_STATUS_FAN34, PB_STATUS_FAN34_BASE, PMBUS_STATUS_FAN_34 }, |
| 382 | }; |
| 383 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 384 | static struct pmbus_data *pmbus_update_device(struct device *dev) |
| 385 | { |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 386 | struct i2c_client *client = to_i2c_client(dev->parent); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 387 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 388 | const struct pmbus_driver_info *info = data->info; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 389 | struct pmbus_sensor *sensor; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 390 | |
| 391 | mutex_lock(&data->update_lock); |
| 392 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 393 | int i, j; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 394 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 395 | for (i = 0; i < info->pages; i++) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 396 | data->status[PB_STATUS_BASE + i] |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 397 | = _pmbus_read_byte_data(client, i, |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 398 | data->status_register); |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 399 | for (j = 0; j < ARRAY_SIZE(pmbus_status); j++) { |
| 400 | struct _pmbus_status *s = &pmbus_status[j]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 401 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 402 | if (!(info->func[i] & s->func)) |
| 403 | continue; |
| 404 | data->status[s->base + i] |
| 405 | = _pmbus_read_byte_data(client, i, |
| 406 | s->reg); |
| 407 | } |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 408 | } |
| 409 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 410 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) |
| 411 | data->status[PB_STATUS_INPUT_BASE] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 412 | = _pmbus_read_byte_data(client, 0, |
| 413 | PMBUS_STATUS_INPUT); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 414 | |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 415 | if (info->func[0] & PMBUS_HAVE_STATUS_VMON) |
| 416 | data->status[PB_STATUS_VMON_BASE] |
| 417 | = _pmbus_read_byte_data(client, 0, |
| 418 | PMBUS_VIRT_STATUS_VMON); |
| 419 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 420 | for (sensor = data->sensors; sensor; sensor = sensor->next) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 421 | if (!data->valid || sensor->update) |
| 422 | sensor->data |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 423 | = _pmbus_read_word_data(client, |
| 424 | sensor->page, |
| 425 | sensor->reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 426 | } |
| 427 | pmbus_clear_faults(client); |
| 428 | data->last_updated = jiffies; |
| 429 | data->valid = 1; |
| 430 | } |
| 431 | mutex_unlock(&data->update_lock); |
| 432 | return data; |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * Convert linear sensor values to milli- or micro-units |
| 437 | * depending on sensor type. |
| 438 | */ |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 439 | static long pmbus_reg2data_linear(struct pmbus_data *data, |
| 440 | struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 441 | { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 442 | s16 exponent; |
| 443 | s32 mantissa; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 444 | long val; |
| 445 | |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 446 | if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 447 | exponent = data->exponent[sensor->page]; |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 448 | mantissa = (u16) sensor->data; |
| 449 | } else { /* LINEAR11 */ |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 450 | exponent = ((s16)sensor->data) >> 11; |
| 451 | mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | val = mantissa; |
| 455 | |
| 456 | /* scale result to milli-units for all sensors except fans */ |
| 457 | if (sensor->class != PSC_FAN) |
| 458 | val = val * 1000L; |
| 459 | |
| 460 | /* scale result to micro-units for power sensors */ |
| 461 | if (sensor->class == PSC_POWER) |
| 462 | val = val * 1000L; |
| 463 | |
| 464 | if (exponent >= 0) |
| 465 | val <<= exponent; |
| 466 | else |
| 467 | val >>= -exponent; |
| 468 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 469 | return val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /* |
| 473 | * Convert direct sensor values to milli- or micro-units |
| 474 | * depending on sensor type. |
| 475 | */ |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 476 | static long pmbus_reg2data_direct(struct pmbus_data *data, |
| 477 | struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 478 | { |
| 479 | long val = (s16) sensor->data; |
| 480 | long m, b, R; |
| 481 | |
| 482 | m = data->info->m[sensor->class]; |
| 483 | b = data->info->b[sensor->class]; |
| 484 | R = data->info->R[sensor->class]; |
| 485 | |
| 486 | if (m == 0) |
| 487 | return 0; |
| 488 | |
| 489 | /* X = 1/m * (Y * 10^-R - b) */ |
| 490 | R = -R; |
| 491 | /* scale result to milli-units for everything but fans */ |
| 492 | if (sensor->class != PSC_FAN) { |
| 493 | R += 3; |
| 494 | b *= 1000; |
| 495 | } |
| 496 | |
| 497 | /* scale result to micro-units for power sensors */ |
| 498 | if (sensor->class == PSC_POWER) { |
| 499 | R += 3; |
| 500 | b *= 1000; |
| 501 | } |
| 502 | |
| 503 | while (R > 0) { |
| 504 | val *= 10; |
| 505 | R--; |
| 506 | } |
| 507 | while (R < 0) { |
| 508 | val = DIV_ROUND_CLOSEST(val, 10); |
| 509 | R++; |
| 510 | } |
| 511 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 512 | return (val - b) / m; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 513 | } |
| 514 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 515 | /* |
| 516 | * Convert VID sensor values to milli- or micro-units |
| 517 | * depending on sensor type. |
| 518 | * We currently only support VR11. |
| 519 | */ |
| 520 | static long pmbus_reg2data_vid(struct pmbus_data *data, |
| 521 | struct pmbus_sensor *sensor) |
| 522 | { |
| 523 | long val = sensor->data; |
| 524 | |
| 525 | if (val < 0x02 || val > 0xb2) |
| 526 | return 0; |
| 527 | return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100); |
| 528 | } |
| 529 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 530 | static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 531 | { |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 532 | long val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 533 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 534 | switch (data->info->format[sensor->class]) { |
| 535 | case direct: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 536 | val = pmbus_reg2data_direct(data, sensor); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 537 | break; |
| 538 | case vid: |
| 539 | val = pmbus_reg2data_vid(data, sensor); |
| 540 | break; |
| 541 | case linear: |
| 542 | default: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 543 | val = pmbus_reg2data_linear(data, sensor); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 544 | break; |
| 545 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 546 | return val; |
| 547 | } |
| 548 | |
| 549 | #define MAX_MANTISSA (1023 * 1000) |
| 550 | #define MIN_MANTISSA (511 * 1000) |
| 551 | |
| 552 | static u16 pmbus_data2reg_linear(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 553 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 554 | { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 555 | s16 exponent = 0, mantissa; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 556 | bool negative = false; |
| 557 | |
| 558 | /* simple case */ |
| 559 | if (val == 0) |
| 560 | return 0; |
| 561 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 562 | if (sensor->class == PSC_VOLTAGE_OUT) { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 563 | /* LINEAR16 does not support negative voltages */ |
| 564 | if (val < 0) |
| 565 | return 0; |
| 566 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 567 | /* |
| 568 | * For a static exponents, we don't have a choice |
| 569 | * but to adjust the value to it. |
| 570 | */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 571 | if (data->exponent[sensor->page] < 0) |
| 572 | val <<= -data->exponent[sensor->page]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 573 | else |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 574 | val >>= data->exponent[sensor->page]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 575 | val = DIV_ROUND_CLOSEST(val, 1000); |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 576 | return val & 0xffff; |
| 577 | } |
| 578 | |
| 579 | if (val < 0) { |
| 580 | negative = true; |
| 581 | val = -val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /* Power is in uW. Convert to mW before converting. */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 585 | if (sensor->class == PSC_POWER) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 586 | val = DIV_ROUND_CLOSEST(val, 1000L); |
| 587 | |
| 588 | /* |
| 589 | * For simplicity, convert fan data to milli-units |
| 590 | * before calculating the exponent. |
| 591 | */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 592 | if (sensor->class == PSC_FAN) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 593 | val = val * 1000; |
| 594 | |
| 595 | /* Reduce large mantissa until it fits into 10 bit */ |
| 596 | while (val >= MAX_MANTISSA && exponent < 15) { |
| 597 | exponent++; |
| 598 | val >>= 1; |
| 599 | } |
| 600 | /* Increase small mantissa to improve precision */ |
| 601 | while (val < MIN_MANTISSA && exponent > -15) { |
| 602 | exponent--; |
| 603 | val <<= 1; |
| 604 | } |
| 605 | |
| 606 | /* Convert mantissa from milli-units to units */ |
| 607 | mantissa = DIV_ROUND_CLOSEST(val, 1000); |
| 608 | |
| 609 | /* Ensure that resulting number is within range */ |
| 610 | if (mantissa > 0x3ff) |
| 611 | mantissa = 0x3ff; |
| 612 | |
| 613 | /* restore sign */ |
| 614 | if (negative) |
| 615 | mantissa = -mantissa; |
| 616 | |
| 617 | /* Convert to 5 bit exponent, 11 bit mantissa */ |
| 618 | return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); |
| 619 | } |
| 620 | |
| 621 | static u16 pmbus_data2reg_direct(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 622 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 623 | { |
| 624 | long m, b, R; |
| 625 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 626 | m = data->info->m[sensor->class]; |
| 627 | b = data->info->b[sensor->class]; |
| 628 | R = data->info->R[sensor->class]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 629 | |
| 630 | /* Power is in uW. Adjust R and b. */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 631 | if (sensor->class == PSC_POWER) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 632 | R -= 3; |
| 633 | b *= 1000; |
| 634 | } |
| 635 | |
| 636 | /* Calculate Y = (m * X + b) * 10^R */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 637 | if (sensor->class != PSC_FAN) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 638 | R -= 3; /* Adjust R and b for data in milli-units */ |
| 639 | b *= 1000; |
| 640 | } |
| 641 | val = val * m + b; |
| 642 | |
| 643 | while (R > 0) { |
| 644 | val *= 10; |
| 645 | R--; |
| 646 | } |
| 647 | while (R < 0) { |
| 648 | val = DIV_ROUND_CLOSEST(val, 10); |
| 649 | R++; |
| 650 | } |
| 651 | |
| 652 | return val; |
| 653 | } |
| 654 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 655 | static u16 pmbus_data2reg_vid(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 656 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 657 | { |
Guenter Roeck | 2a844c1 | 2013-01-09 08:09:34 -0800 | [diff] [blame] | 658 | val = clamp_val(val, 500, 1600); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 659 | |
| 660 | return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625); |
| 661 | } |
| 662 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 663 | static u16 pmbus_data2reg(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 664 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 665 | { |
| 666 | u16 regval; |
| 667 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 668 | switch (data->info->format[sensor->class]) { |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 669 | case direct: |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 670 | regval = pmbus_data2reg_direct(data, sensor, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 671 | break; |
| 672 | case vid: |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 673 | regval = pmbus_data2reg_vid(data, sensor, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 674 | break; |
| 675 | case linear: |
| 676 | default: |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 677 | regval = pmbus_data2reg_linear(data, sensor, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 678 | break; |
| 679 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 680 | return regval; |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Return boolean calculated from converted data. |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 685 | * <index> defines a status register index and mask. |
| 686 | * The mask is in the lower 8 bits, the register index is in bits 8..23. |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 687 | * |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 688 | * The associated pmbus_boolean structure contains optional pointers to two |
| 689 | * sensor attributes. If specified, those attributes are compared against each |
| 690 | * other to determine if a limit has been exceeded. |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 691 | * |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 692 | * If the sensor attribute pointers are NULL, the function returns true if |
| 693 | * (status[reg] & mask) is true. |
| 694 | * |
| 695 | * If sensor attribute pointers are provided, a comparison against a specified |
| 696 | * limit has to be performed to determine the boolean result. |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 697 | * In this case, the function returns true if v1 >= v2 (where v1 and v2 are |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 698 | * sensor values referenced by sensor attribute pointers s1 and s2). |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 699 | * |
| 700 | * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. |
| 701 | * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. |
| 702 | * |
| 703 | * If a negative value is stored in any of the referenced registers, this value |
| 704 | * reflects an error code which will be returned. |
| 705 | */ |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 706 | static int pmbus_get_boolean(struct pmbus_data *data, struct pmbus_boolean *b, |
| 707 | int index) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 708 | { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 709 | struct pmbus_sensor *s1 = b->s1; |
| 710 | struct pmbus_sensor *s2 = b->s2; |
| 711 | u16 reg = (index >> 8) & 0xffff; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 712 | u8 mask = index & 0xff; |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 713 | int ret, status; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 714 | u8 regval; |
| 715 | |
| 716 | status = data->status[reg]; |
| 717 | if (status < 0) |
| 718 | return status; |
| 719 | |
| 720 | regval = status & mask; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 721 | if (!s1 && !s2) { |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 722 | ret = !!regval; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 723 | } else if (!s1 || !s2) { |
Guenter Roeck | af78fdf | 2013-09-13 10:31:38 -0700 | [diff] [blame] | 724 | WARN(1, "Bad boolean descriptor %p: s1=%p, s2=%p\n", b, s1, s2); |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 725 | return 0; |
| 726 | } else { |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 727 | long v1, v2; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 728 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 729 | if (s1->data < 0) |
| 730 | return s1->data; |
| 731 | if (s2->data < 0) |
| 732 | return s2->data; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 733 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 734 | v1 = pmbus_reg2data(data, s1); |
| 735 | v2 = pmbus_reg2data(data, s2); |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 736 | ret = !!(regval && v1 >= v2); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 737 | } |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 738 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 739 | } |
| 740 | |
| 741 | static ssize_t pmbus_show_boolean(struct device *dev, |
| 742 | struct device_attribute *da, char *buf) |
| 743 | { |
| 744 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 745 | struct pmbus_boolean *boolean = to_pmbus_boolean(attr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 746 | struct pmbus_data *data = pmbus_update_device(dev); |
| 747 | int val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 748 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 749 | val = pmbus_get_boolean(data, boolean, attr->index); |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 750 | if (val < 0) |
| 751 | return val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 752 | return snprintf(buf, PAGE_SIZE, "%d\n", val); |
| 753 | } |
| 754 | |
| 755 | static ssize_t pmbus_show_sensor(struct device *dev, |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 756 | struct device_attribute *devattr, char *buf) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 757 | { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 758 | struct pmbus_data *data = pmbus_update_device(dev); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 759 | struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 760 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 761 | if (sensor->data < 0) |
| 762 | return sensor->data; |
| 763 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 764 | return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor)); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | static ssize_t pmbus_set_sensor(struct device *dev, |
| 768 | struct device_attribute *devattr, |
| 769 | const char *buf, size_t count) |
| 770 | { |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 771 | struct i2c_client *client = to_i2c_client(dev->parent); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 772 | struct pmbus_data *data = i2c_get_clientdata(client); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 773 | struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 774 | ssize_t rv = count; |
| 775 | long val = 0; |
| 776 | int ret; |
| 777 | u16 regval; |
| 778 | |
Guenter Roeck | 0117c3f | 2012-01-16 10:14:54 -0800 | [diff] [blame] | 779 | if (kstrtol(buf, 10, &val) < 0) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 780 | return -EINVAL; |
| 781 | |
| 782 | mutex_lock(&data->update_lock); |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 783 | regval = pmbus_data2reg(data, sensor, val); |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 784 | ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 785 | if (ret < 0) |
| 786 | rv = ret; |
| 787 | else |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 788 | sensor->data = regval; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 789 | mutex_unlock(&data->update_lock); |
| 790 | return rv; |
| 791 | } |
| 792 | |
| 793 | static ssize_t pmbus_show_label(struct device *dev, |
| 794 | struct device_attribute *da, char *buf) |
| 795 | { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 796 | struct pmbus_label *label = to_pmbus_label(da); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 797 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 798 | return snprintf(buf, PAGE_SIZE, "%s\n", label->label); |
| 799 | } |
| 800 | |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 801 | static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr) |
| 802 | { |
| 803 | if (data->num_attributes >= data->max_attributes - 1) { |
David Woodhouse | 6975404 | 2013-03-14 13:30:20 +0000 | [diff] [blame] | 804 | int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE; |
| 805 | void *new_attrs = krealloc(data->group.attrs, |
| 806 | new_max_attrs * sizeof(void *), |
| 807 | GFP_KERNEL); |
| 808 | if (!new_attrs) |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 809 | return -ENOMEM; |
David Woodhouse | 6975404 | 2013-03-14 13:30:20 +0000 | [diff] [blame] | 810 | data->group.attrs = new_attrs; |
| 811 | data->max_attributes = new_max_attrs; |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | data->group.attrs[data->num_attributes++] = attr; |
| 815 | data->group.attrs[data->num_attributes] = NULL; |
| 816 | return 0; |
| 817 | } |
| 818 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 819 | static void pmbus_dev_attr_init(struct device_attribute *dev_attr, |
| 820 | const char *name, |
| 821 | umode_t mode, |
| 822 | ssize_t (*show)(struct device *dev, |
| 823 | struct device_attribute *attr, |
| 824 | char *buf), |
| 825 | ssize_t (*store)(struct device *dev, |
| 826 | struct device_attribute *attr, |
| 827 | const char *buf, size_t count)) |
| 828 | { |
| 829 | sysfs_attr_init(&dev_attr->attr); |
| 830 | dev_attr->attr.name = name; |
| 831 | dev_attr->attr.mode = mode; |
| 832 | dev_attr->show = show; |
| 833 | dev_attr->store = store; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 834 | } |
| 835 | |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 836 | static void pmbus_attr_init(struct sensor_device_attribute *a, |
| 837 | const char *name, |
| 838 | umode_t mode, |
| 839 | ssize_t (*show)(struct device *dev, |
| 840 | struct device_attribute *attr, |
| 841 | char *buf), |
| 842 | ssize_t (*store)(struct device *dev, |
| 843 | struct device_attribute *attr, |
| 844 | const char *buf, size_t count), |
| 845 | int idx) |
| 846 | { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 847 | pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store); |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 848 | a->index = idx; |
| 849 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 850 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 851 | static int pmbus_add_boolean(struct pmbus_data *data, |
| 852 | const char *name, const char *type, int seq, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 853 | struct pmbus_sensor *s1, |
| 854 | struct pmbus_sensor *s2, |
| 855 | u16 reg, u8 mask) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 856 | { |
| 857 | struct pmbus_boolean *boolean; |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 858 | struct sensor_device_attribute *a; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 859 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 860 | boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL); |
| 861 | if (!boolean) |
| 862 | return -ENOMEM; |
| 863 | |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 864 | a = &boolean->attribute; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 865 | |
| 866 | snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", |
| 867 | name, seq, type); |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 868 | boolean->s1 = s1; |
| 869 | boolean->s2 = s2; |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 870 | pmbus_attr_init(a, boolean->name, S_IRUGO, pmbus_show_boolean, NULL, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 871 | (reg << 8) | mask); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 872 | |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 873 | return pmbus_add_attribute(data, &a->dev_attr.attr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 874 | } |
| 875 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 876 | static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, |
| 877 | const char *name, const char *type, |
| 878 | int seq, int page, int reg, |
| 879 | enum pmbus_sensor_classes class, |
| 880 | bool update, bool readonly) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 881 | { |
| 882 | struct pmbus_sensor *sensor; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 883 | struct device_attribute *a; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 884 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 885 | sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL); |
| 886 | if (!sensor) |
| 887 | return NULL; |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 888 | a = &sensor->attribute; |
| 889 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 890 | snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", |
| 891 | name, seq, type); |
| 892 | sensor->page = page; |
| 893 | sensor->reg = reg; |
| 894 | sensor->class = class; |
| 895 | sensor->update = update; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 896 | pmbus_dev_attr_init(a, sensor->name, |
| 897 | readonly ? S_IRUGO : S_IRUGO | S_IWUSR, |
| 898 | pmbus_show_sensor, pmbus_set_sensor); |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 899 | |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 900 | if (pmbus_add_attribute(data, &a->attr)) |
| 901 | return NULL; |
| 902 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 903 | sensor->next = data->sensors; |
| 904 | data->sensors = sensor; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 905 | |
| 906 | return sensor; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 907 | } |
| 908 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 909 | static int pmbus_add_label(struct pmbus_data *data, |
| 910 | const char *name, int seq, |
| 911 | const char *lstring, int index) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 912 | { |
| 913 | struct pmbus_label *label; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 914 | struct device_attribute *a; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 915 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 916 | label = devm_kzalloc(data->dev, sizeof(*label), GFP_KERNEL); |
| 917 | if (!label) |
| 918 | return -ENOMEM; |
| 919 | |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 920 | a = &label->attribute; |
| 921 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 922 | snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); |
| 923 | if (!index) |
| 924 | strncpy(label->label, lstring, sizeof(label->label) - 1); |
| 925 | else |
| 926 | snprintf(label->label, sizeof(label->label), "%s%d", lstring, |
| 927 | index); |
| 928 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 929 | pmbus_dev_attr_init(a, label->name, S_IRUGO, pmbus_show_label, NULL); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 930 | return pmbus_add_attribute(data, &a->attr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 931 | } |
| 932 | |
| 933 | /* |
| 934 | * Search for attributes. Allocate sensors, booleans, and labels as needed. |
| 935 | */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 936 | |
| 937 | /* |
| 938 | * The pmbus_limit_attr structure describes a single limit attribute |
| 939 | * and its associated alarm attribute. |
| 940 | */ |
| 941 | struct pmbus_limit_attr { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 942 | u16 reg; /* Limit register */ |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 943 | u16 sbit; /* Alarm attribute status bit */ |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 944 | bool update; /* True if register needs updates */ |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 945 | bool low; /* True if low limit; for limits with compare |
| 946 | functions only */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 947 | const char *attr; /* Attribute name */ |
| 948 | const char *alarm; /* Alarm attribute name */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 949 | }; |
| 950 | |
| 951 | /* |
| 952 | * The pmbus_sensor_attr structure describes one sensor attribute. This |
| 953 | * description includes a reference to the associated limit attributes. |
| 954 | */ |
| 955 | struct pmbus_sensor_attr { |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 956 | u16 reg; /* sensor register */ |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 957 | u8 gbit; /* generic status bit */ |
| 958 | u8 nlimit; /* # of limit registers */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 959 | enum pmbus_sensor_classes class;/* sensor class */ |
| 960 | const char *label; /* sensor label */ |
| 961 | bool paged; /* true if paged sensor */ |
| 962 | bool update; /* true if update needed */ |
| 963 | bool compare; /* true if compare function needed */ |
| 964 | u32 func; /* sensor mask */ |
| 965 | u32 sfunc; /* sensor status mask */ |
| 966 | int sbase; /* status base register */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 967 | const struct pmbus_limit_attr *limit;/* limit registers */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 968 | }; |
| 969 | |
| 970 | /* |
| 971 | * Add a set of limit attributes and, if supported, the associated |
| 972 | * alarm attributes. |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 973 | * returns 0 if no alarm register found, 1 if an alarm register was found, |
| 974 | * < 0 on errors. |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 975 | */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 976 | static int pmbus_add_limit_attrs(struct i2c_client *client, |
| 977 | struct pmbus_data *data, |
| 978 | const struct pmbus_driver_info *info, |
| 979 | const char *name, int index, int page, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 980 | struct pmbus_sensor *base, |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 981 | const struct pmbus_sensor_attr *attr) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 982 | { |
| 983 | const struct pmbus_limit_attr *l = attr->limit; |
| 984 | int nlimit = attr->nlimit; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 985 | int have_alarm = 0; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 986 | int i, ret; |
| 987 | struct pmbus_sensor *curr; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 988 | |
| 989 | for (i = 0; i < nlimit; i++) { |
| 990 | if (pmbus_check_word_register(client, page, l->reg)) { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 991 | curr = pmbus_add_sensor(data, name, l->attr, index, |
| 992 | page, l->reg, attr->class, |
| 993 | attr->update || l->update, |
| 994 | false); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 995 | if (!curr) |
| 996 | return -ENOMEM; |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 997 | if (l->sbit && (info->func[page] & attr->sfunc)) { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 998 | ret = pmbus_add_boolean(data, name, |
| 999 | l->alarm, index, |
| 1000 | attr->compare ? l->low ? curr : base |
| 1001 | : NULL, |
| 1002 | attr->compare ? l->low ? base : curr |
| 1003 | : NULL, |
| 1004 | attr->sbase + page, l->sbit); |
| 1005 | if (ret) |
| 1006 | return ret; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1007 | have_alarm = 1; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1008 | } |
| 1009 | } |
| 1010 | l++; |
| 1011 | } |
| 1012 | return have_alarm; |
| 1013 | } |
| 1014 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1015 | static int pmbus_add_sensor_attrs_one(struct i2c_client *client, |
| 1016 | struct pmbus_data *data, |
| 1017 | const struct pmbus_driver_info *info, |
| 1018 | const char *name, |
| 1019 | int index, int page, |
| 1020 | const struct pmbus_sensor_attr *attr) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1021 | { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1022 | struct pmbus_sensor *base; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1023 | int ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1024 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1025 | if (attr->label) { |
| 1026 | ret = pmbus_add_label(data, name, index, attr->label, |
| 1027 | attr->paged ? page + 1 : 0); |
| 1028 | if (ret) |
| 1029 | return ret; |
| 1030 | } |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1031 | base = pmbus_add_sensor(data, name, "input", index, page, attr->reg, |
| 1032 | attr->class, true, true); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 1033 | if (!base) |
| 1034 | return -ENOMEM; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1035 | if (attr->sfunc) { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1036 | ret = pmbus_add_limit_attrs(client, data, info, name, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1037 | index, page, base, attr); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1038 | if (ret < 0) |
| 1039 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1040 | /* |
| 1041 | * Add generic alarm attribute only if there are no individual |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 1042 | * alarm attributes, if there is a global alarm bit, and if |
| 1043 | * the generic status register for this page is accessible. |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1044 | */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1045 | if (!ret && attr->gbit && |
| 1046 | pmbus_check_byte_register(client, page, |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1047 | data->status_register)) { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1048 | ret = pmbus_add_boolean(data, name, "alarm", index, |
| 1049 | NULL, NULL, |
| 1050 | PB_STATUS_BASE + page, |
| 1051 | attr->gbit); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1052 | if (ret) |
| 1053 | return ret; |
| 1054 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1055 | } |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1056 | return 0; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1057 | } |
| 1058 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1059 | static int pmbus_add_sensor_attrs(struct i2c_client *client, |
| 1060 | struct pmbus_data *data, |
| 1061 | const char *name, |
| 1062 | const struct pmbus_sensor_attr *attrs, |
| 1063 | int nattrs) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1064 | { |
| 1065 | const struct pmbus_driver_info *info = data->info; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1066 | int index, i; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1067 | int ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1068 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1069 | index = 1; |
| 1070 | for (i = 0; i < nattrs; i++) { |
| 1071 | int page, pages; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1072 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1073 | pages = attrs->paged ? info->pages : 1; |
| 1074 | for (page = 0; page < pages; page++) { |
| 1075 | if (!(info->func[page] & attrs->func)) |
Guenter Roeck | b49547a | 2011-03-06 10:56:52 -0800 | [diff] [blame] | 1076 | continue; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1077 | ret = pmbus_add_sensor_attrs_one(client, data, info, |
| 1078 | name, index, page, |
| 1079 | attrs); |
| 1080 | if (ret) |
| 1081 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1082 | index++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1083 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1084 | attrs++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1085 | } |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1086 | return 0; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1087 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1088 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1089 | static const struct pmbus_limit_attr vin_limit_attrs[] = { |
| 1090 | { |
| 1091 | .reg = PMBUS_VIN_UV_WARN_LIMIT, |
| 1092 | .attr = "min", |
| 1093 | .alarm = "min_alarm", |
| 1094 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1095 | }, { |
| 1096 | .reg = PMBUS_VIN_UV_FAULT_LIMIT, |
| 1097 | .attr = "lcrit", |
| 1098 | .alarm = "lcrit_alarm", |
| 1099 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1100 | }, { |
| 1101 | .reg = PMBUS_VIN_OV_WARN_LIMIT, |
| 1102 | .attr = "max", |
| 1103 | .alarm = "max_alarm", |
| 1104 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1105 | }, { |
| 1106 | .reg = PMBUS_VIN_OV_FAULT_LIMIT, |
| 1107 | .attr = "crit", |
| 1108 | .alarm = "crit_alarm", |
| 1109 | .sbit = PB_VOLTAGE_OV_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1110 | }, { |
| 1111 | .reg = PMBUS_VIRT_READ_VIN_AVG, |
| 1112 | .update = true, |
| 1113 | .attr = "average", |
| 1114 | }, { |
| 1115 | .reg = PMBUS_VIRT_READ_VIN_MIN, |
| 1116 | .update = true, |
| 1117 | .attr = "lowest", |
| 1118 | }, { |
| 1119 | .reg = PMBUS_VIRT_READ_VIN_MAX, |
| 1120 | .update = true, |
| 1121 | .attr = "highest", |
| 1122 | }, { |
| 1123 | .reg = PMBUS_VIRT_RESET_VIN_HISTORY, |
| 1124 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1125 | }, |
| 1126 | }; |
| 1127 | |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 1128 | static const struct pmbus_limit_attr vmon_limit_attrs[] = { |
| 1129 | { |
| 1130 | .reg = PMBUS_VIRT_VMON_UV_WARN_LIMIT, |
| 1131 | .attr = "min", |
| 1132 | .alarm = "min_alarm", |
| 1133 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1134 | }, { |
| 1135 | .reg = PMBUS_VIRT_VMON_UV_FAULT_LIMIT, |
| 1136 | .attr = "lcrit", |
| 1137 | .alarm = "lcrit_alarm", |
| 1138 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1139 | }, { |
| 1140 | .reg = PMBUS_VIRT_VMON_OV_WARN_LIMIT, |
| 1141 | .attr = "max", |
| 1142 | .alarm = "max_alarm", |
| 1143 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1144 | }, { |
| 1145 | .reg = PMBUS_VIRT_VMON_OV_FAULT_LIMIT, |
| 1146 | .attr = "crit", |
| 1147 | .alarm = "crit_alarm", |
| 1148 | .sbit = PB_VOLTAGE_OV_FAULT, |
| 1149 | } |
| 1150 | }; |
| 1151 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1152 | static const struct pmbus_limit_attr vout_limit_attrs[] = { |
| 1153 | { |
| 1154 | .reg = PMBUS_VOUT_UV_WARN_LIMIT, |
| 1155 | .attr = "min", |
| 1156 | .alarm = "min_alarm", |
| 1157 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1158 | }, { |
| 1159 | .reg = PMBUS_VOUT_UV_FAULT_LIMIT, |
| 1160 | .attr = "lcrit", |
| 1161 | .alarm = "lcrit_alarm", |
| 1162 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1163 | }, { |
| 1164 | .reg = PMBUS_VOUT_OV_WARN_LIMIT, |
| 1165 | .attr = "max", |
| 1166 | .alarm = "max_alarm", |
| 1167 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1168 | }, { |
| 1169 | .reg = PMBUS_VOUT_OV_FAULT_LIMIT, |
| 1170 | .attr = "crit", |
| 1171 | .alarm = "crit_alarm", |
| 1172 | .sbit = PB_VOLTAGE_OV_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1173 | }, { |
| 1174 | .reg = PMBUS_VIRT_READ_VOUT_AVG, |
| 1175 | .update = true, |
| 1176 | .attr = "average", |
| 1177 | }, { |
| 1178 | .reg = PMBUS_VIRT_READ_VOUT_MIN, |
| 1179 | .update = true, |
| 1180 | .attr = "lowest", |
| 1181 | }, { |
| 1182 | .reg = PMBUS_VIRT_READ_VOUT_MAX, |
| 1183 | .update = true, |
| 1184 | .attr = "highest", |
| 1185 | }, { |
| 1186 | .reg = PMBUS_VIRT_RESET_VOUT_HISTORY, |
| 1187 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1188 | } |
| 1189 | }; |
| 1190 | |
| 1191 | static const struct pmbus_sensor_attr voltage_attributes[] = { |
| 1192 | { |
| 1193 | .reg = PMBUS_READ_VIN, |
| 1194 | .class = PSC_VOLTAGE_IN, |
| 1195 | .label = "vin", |
| 1196 | .func = PMBUS_HAVE_VIN, |
| 1197 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1198 | .sbase = PB_STATUS_INPUT_BASE, |
| 1199 | .gbit = PB_STATUS_VIN_UV, |
| 1200 | .limit = vin_limit_attrs, |
| 1201 | .nlimit = ARRAY_SIZE(vin_limit_attrs), |
| 1202 | }, { |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 1203 | .reg = PMBUS_VIRT_READ_VMON, |
| 1204 | .class = PSC_VOLTAGE_IN, |
| 1205 | .label = "vmon", |
| 1206 | .func = PMBUS_HAVE_VMON, |
| 1207 | .sfunc = PMBUS_HAVE_STATUS_VMON, |
| 1208 | .sbase = PB_STATUS_VMON_BASE, |
| 1209 | .limit = vmon_limit_attrs, |
| 1210 | .nlimit = ARRAY_SIZE(vmon_limit_attrs), |
| 1211 | }, { |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1212 | .reg = PMBUS_READ_VCAP, |
| 1213 | .class = PSC_VOLTAGE_IN, |
| 1214 | .label = "vcap", |
| 1215 | .func = PMBUS_HAVE_VCAP, |
| 1216 | }, { |
| 1217 | .reg = PMBUS_READ_VOUT, |
| 1218 | .class = PSC_VOLTAGE_OUT, |
| 1219 | .label = "vout", |
| 1220 | .paged = true, |
| 1221 | .func = PMBUS_HAVE_VOUT, |
| 1222 | .sfunc = PMBUS_HAVE_STATUS_VOUT, |
| 1223 | .sbase = PB_STATUS_VOUT_BASE, |
| 1224 | .gbit = PB_STATUS_VOUT_OV, |
| 1225 | .limit = vout_limit_attrs, |
| 1226 | .nlimit = ARRAY_SIZE(vout_limit_attrs), |
| 1227 | } |
| 1228 | }; |
| 1229 | |
| 1230 | /* Current attributes */ |
| 1231 | |
| 1232 | static const struct pmbus_limit_attr iin_limit_attrs[] = { |
| 1233 | { |
| 1234 | .reg = PMBUS_IIN_OC_WARN_LIMIT, |
| 1235 | .attr = "max", |
| 1236 | .alarm = "max_alarm", |
| 1237 | .sbit = PB_IIN_OC_WARNING, |
| 1238 | }, { |
| 1239 | .reg = PMBUS_IIN_OC_FAULT_LIMIT, |
| 1240 | .attr = "crit", |
| 1241 | .alarm = "crit_alarm", |
| 1242 | .sbit = PB_IIN_OC_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1243 | }, { |
| 1244 | .reg = PMBUS_VIRT_READ_IIN_AVG, |
| 1245 | .update = true, |
| 1246 | .attr = "average", |
| 1247 | }, { |
| 1248 | .reg = PMBUS_VIRT_READ_IIN_MIN, |
| 1249 | .update = true, |
| 1250 | .attr = "lowest", |
| 1251 | }, { |
| 1252 | .reg = PMBUS_VIRT_READ_IIN_MAX, |
| 1253 | .update = true, |
| 1254 | .attr = "highest", |
| 1255 | }, { |
| 1256 | .reg = PMBUS_VIRT_RESET_IIN_HISTORY, |
| 1257 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1258 | } |
| 1259 | }; |
| 1260 | |
| 1261 | static const struct pmbus_limit_attr iout_limit_attrs[] = { |
| 1262 | { |
| 1263 | .reg = PMBUS_IOUT_OC_WARN_LIMIT, |
| 1264 | .attr = "max", |
| 1265 | .alarm = "max_alarm", |
| 1266 | .sbit = PB_IOUT_OC_WARNING, |
| 1267 | }, { |
| 1268 | .reg = PMBUS_IOUT_UC_FAULT_LIMIT, |
| 1269 | .attr = "lcrit", |
| 1270 | .alarm = "lcrit_alarm", |
| 1271 | .sbit = PB_IOUT_UC_FAULT, |
| 1272 | }, { |
| 1273 | .reg = PMBUS_IOUT_OC_FAULT_LIMIT, |
| 1274 | .attr = "crit", |
| 1275 | .alarm = "crit_alarm", |
| 1276 | .sbit = PB_IOUT_OC_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1277 | }, { |
| 1278 | .reg = PMBUS_VIRT_READ_IOUT_AVG, |
| 1279 | .update = true, |
| 1280 | .attr = "average", |
| 1281 | }, { |
| 1282 | .reg = PMBUS_VIRT_READ_IOUT_MIN, |
| 1283 | .update = true, |
| 1284 | .attr = "lowest", |
| 1285 | }, { |
| 1286 | .reg = PMBUS_VIRT_READ_IOUT_MAX, |
| 1287 | .update = true, |
| 1288 | .attr = "highest", |
| 1289 | }, { |
| 1290 | .reg = PMBUS_VIRT_RESET_IOUT_HISTORY, |
| 1291 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1292 | } |
| 1293 | }; |
| 1294 | |
| 1295 | static const struct pmbus_sensor_attr current_attributes[] = { |
| 1296 | { |
| 1297 | .reg = PMBUS_READ_IIN, |
| 1298 | .class = PSC_CURRENT_IN, |
| 1299 | .label = "iin", |
| 1300 | .func = PMBUS_HAVE_IIN, |
| 1301 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1302 | .sbase = PB_STATUS_INPUT_BASE, |
| 1303 | .limit = iin_limit_attrs, |
| 1304 | .nlimit = ARRAY_SIZE(iin_limit_attrs), |
| 1305 | }, { |
| 1306 | .reg = PMBUS_READ_IOUT, |
| 1307 | .class = PSC_CURRENT_OUT, |
| 1308 | .label = "iout", |
| 1309 | .paged = true, |
| 1310 | .func = PMBUS_HAVE_IOUT, |
| 1311 | .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| 1312 | .sbase = PB_STATUS_IOUT_BASE, |
| 1313 | .gbit = PB_STATUS_IOUT_OC, |
| 1314 | .limit = iout_limit_attrs, |
| 1315 | .nlimit = ARRAY_SIZE(iout_limit_attrs), |
| 1316 | } |
| 1317 | }; |
| 1318 | |
| 1319 | /* Power attributes */ |
| 1320 | |
| 1321 | static const struct pmbus_limit_attr pin_limit_attrs[] = { |
| 1322 | { |
| 1323 | .reg = PMBUS_PIN_OP_WARN_LIMIT, |
| 1324 | .attr = "max", |
| 1325 | .alarm = "alarm", |
| 1326 | .sbit = PB_PIN_OP_WARNING, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1327 | }, { |
| 1328 | .reg = PMBUS_VIRT_READ_PIN_AVG, |
| 1329 | .update = true, |
| 1330 | .attr = "average", |
| 1331 | }, { |
| 1332 | .reg = PMBUS_VIRT_READ_PIN_MAX, |
| 1333 | .update = true, |
| 1334 | .attr = "input_highest", |
| 1335 | }, { |
| 1336 | .reg = PMBUS_VIRT_RESET_PIN_HISTORY, |
| 1337 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1338 | } |
| 1339 | }; |
| 1340 | |
| 1341 | static const struct pmbus_limit_attr pout_limit_attrs[] = { |
| 1342 | { |
| 1343 | .reg = PMBUS_POUT_MAX, |
| 1344 | .attr = "cap", |
| 1345 | .alarm = "cap_alarm", |
| 1346 | .sbit = PB_POWER_LIMITING, |
| 1347 | }, { |
| 1348 | .reg = PMBUS_POUT_OP_WARN_LIMIT, |
| 1349 | .attr = "max", |
| 1350 | .alarm = "max_alarm", |
| 1351 | .sbit = PB_POUT_OP_WARNING, |
| 1352 | }, { |
| 1353 | .reg = PMBUS_POUT_OP_FAULT_LIMIT, |
| 1354 | .attr = "crit", |
| 1355 | .alarm = "crit_alarm", |
| 1356 | .sbit = PB_POUT_OP_FAULT, |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1357 | }, { |
| 1358 | .reg = PMBUS_VIRT_READ_POUT_AVG, |
| 1359 | .update = true, |
| 1360 | .attr = "average", |
| 1361 | }, { |
| 1362 | .reg = PMBUS_VIRT_READ_POUT_MAX, |
| 1363 | .update = true, |
| 1364 | .attr = "input_highest", |
| 1365 | }, { |
| 1366 | .reg = PMBUS_VIRT_RESET_POUT_HISTORY, |
| 1367 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1368 | } |
| 1369 | }; |
| 1370 | |
| 1371 | static const struct pmbus_sensor_attr power_attributes[] = { |
| 1372 | { |
| 1373 | .reg = PMBUS_READ_PIN, |
| 1374 | .class = PSC_POWER, |
| 1375 | .label = "pin", |
| 1376 | .func = PMBUS_HAVE_PIN, |
| 1377 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1378 | .sbase = PB_STATUS_INPUT_BASE, |
| 1379 | .limit = pin_limit_attrs, |
| 1380 | .nlimit = ARRAY_SIZE(pin_limit_attrs), |
| 1381 | }, { |
| 1382 | .reg = PMBUS_READ_POUT, |
| 1383 | .class = PSC_POWER, |
| 1384 | .label = "pout", |
| 1385 | .paged = true, |
| 1386 | .func = PMBUS_HAVE_POUT, |
| 1387 | .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| 1388 | .sbase = PB_STATUS_IOUT_BASE, |
| 1389 | .limit = pout_limit_attrs, |
| 1390 | .nlimit = ARRAY_SIZE(pout_limit_attrs), |
| 1391 | } |
| 1392 | }; |
| 1393 | |
| 1394 | /* Temperature atributes */ |
| 1395 | |
| 1396 | static const struct pmbus_limit_attr temp_limit_attrs[] = { |
| 1397 | { |
| 1398 | .reg = PMBUS_UT_WARN_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1399 | .low = true, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1400 | .attr = "min", |
| 1401 | .alarm = "min_alarm", |
| 1402 | .sbit = PB_TEMP_UT_WARNING, |
| 1403 | }, { |
| 1404 | .reg = PMBUS_UT_FAULT_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1405 | .low = true, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1406 | .attr = "lcrit", |
| 1407 | .alarm = "lcrit_alarm", |
| 1408 | .sbit = PB_TEMP_UT_FAULT, |
| 1409 | }, { |
| 1410 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1411 | .attr = "max", |
| 1412 | .alarm = "max_alarm", |
| 1413 | .sbit = PB_TEMP_OT_WARNING, |
| 1414 | }, { |
| 1415 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1416 | .attr = "crit", |
| 1417 | .alarm = "crit_alarm", |
| 1418 | .sbit = PB_TEMP_OT_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1419 | }, { |
| 1420 | .reg = PMBUS_VIRT_READ_TEMP_MIN, |
| 1421 | .attr = "lowest", |
| 1422 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1423 | .reg = PMBUS_VIRT_READ_TEMP_AVG, |
| 1424 | .attr = "average", |
| 1425 | }, { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1426 | .reg = PMBUS_VIRT_READ_TEMP_MAX, |
| 1427 | .attr = "highest", |
| 1428 | }, { |
| 1429 | .reg = PMBUS_VIRT_RESET_TEMP_HISTORY, |
| 1430 | .attr = "reset_history", |
| 1431 | } |
| 1432 | }; |
| 1433 | |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1434 | static const struct pmbus_limit_attr temp_limit_attrs2[] = { |
| 1435 | { |
| 1436 | .reg = PMBUS_UT_WARN_LIMIT, |
| 1437 | .low = true, |
| 1438 | .attr = "min", |
| 1439 | .alarm = "min_alarm", |
| 1440 | .sbit = PB_TEMP_UT_WARNING, |
| 1441 | }, { |
| 1442 | .reg = PMBUS_UT_FAULT_LIMIT, |
| 1443 | .low = true, |
| 1444 | .attr = "lcrit", |
| 1445 | .alarm = "lcrit_alarm", |
| 1446 | .sbit = PB_TEMP_UT_FAULT, |
| 1447 | }, { |
| 1448 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1449 | .attr = "max", |
| 1450 | .alarm = "max_alarm", |
| 1451 | .sbit = PB_TEMP_OT_WARNING, |
| 1452 | }, { |
| 1453 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1454 | .attr = "crit", |
| 1455 | .alarm = "crit_alarm", |
| 1456 | .sbit = PB_TEMP_OT_FAULT, |
| 1457 | }, { |
| 1458 | .reg = PMBUS_VIRT_READ_TEMP2_MIN, |
| 1459 | .attr = "lowest", |
| 1460 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1461 | .reg = PMBUS_VIRT_READ_TEMP2_AVG, |
| 1462 | .attr = "average", |
| 1463 | }, { |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1464 | .reg = PMBUS_VIRT_READ_TEMP2_MAX, |
| 1465 | .attr = "highest", |
| 1466 | }, { |
| 1467 | .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY, |
| 1468 | .attr = "reset_history", |
| 1469 | } |
| 1470 | }; |
| 1471 | |
| 1472 | static const struct pmbus_limit_attr temp_limit_attrs3[] = { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1473 | { |
| 1474 | .reg = PMBUS_UT_WARN_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1475 | .low = true, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1476 | .attr = "min", |
| 1477 | .alarm = "min_alarm", |
| 1478 | .sbit = PB_TEMP_UT_WARNING, |
| 1479 | }, { |
| 1480 | .reg = PMBUS_UT_FAULT_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1481 | .low = true, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1482 | .attr = "lcrit", |
| 1483 | .alarm = "lcrit_alarm", |
| 1484 | .sbit = PB_TEMP_UT_FAULT, |
| 1485 | }, { |
| 1486 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1487 | .attr = "max", |
| 1488 | .alarm = "max_alarm", |
| 1489 | .sbit = PB_TEMP_OT_WARNING, |
| 1490 | }, { |
| 1491 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1492 | .attr = "crit", |
| 1493 | .alarm = "crit_alarm", |
| 1494 | .sbit = PB_TEMP_OT_FAULT, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1495 | } |
| 1496 | }; |
| 1497 | |
| 1498 | static const struct pmbus_sensor_attr temp_attributes[] = { |
| 1499 | { |
| 1500 | .reg = PMBUS_READ_TEMPERATURE_1, |
| 1501 | .class = PSC_TEMPERATURE, |
| 1502 | .paged = true, |
| 1503 | .update = true, |
| 1504 | .compare = true, |
| 1505 | .func = PMBUS_HAVE_TEMP, |
| 1506 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1507 | .sbase = PB_STATUS_TEMP_BASE, |
| 1508 | .gbit = PB_STATUS_TEMPERATURE, |
| 1509 | .limit = temp_limit_attrs, |
| 1510 | .nlimit = ARRAY_SIZE(temp_limit_attrs), |
| 1511 | }, { |
| 1512 | .reg = PMBUS_READ_TEMPERATURE_2, |
| 1513 | .class = PSC_TEMPERATURE, |
| 1514 | .paged = true, |
| 1515 | .update = true, |
| 1516 | .compare = true, |
| 1517 | .func = PMBUS_HAVE_TEMP2, |
| 1518 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1519 | .sbase = PB_STATUS_TEMP_BASE, |
| 1520 | .gbit = PB_STATUS_TEMPERATURE, |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1521 | .limit = temp_limit_attrs2, |
| 1522 | .nlimit = ARRAY_SIZE(temp_limit_attrs2), |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1523 | }, { |
| 1524 | .reg = PMBUS_READ_TEMPERATURE_3, |
| 1525 | .class = PSC_TEMPERATURE, |
| 1526 | .paged = true, |
| 1527 | .update = true, |
| 1528 | .compare = true, |
| 1529 | .func = PMBUS_HAVE_TEMP3, |
| 1530 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1531 | .sbase = PB_STATUS_TEMP_BASE, |
| 1532 | .gbit = PB_STATUS_TEMPERATURE, |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1533 | .limit = temp_limit_attrs3, |
| 1534 | .nlimit = ARRAY_SIZE(temp_limit_attrs3), |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1535 | } |
| 1536 | }; |
| 1537 | |
| 1538 | static const int pmbus_fan_registers[] = { |
| 1539 | PMBUS_READ_FAN_SPEED_1, |
| 1540 | PMBUS_READ_FAN_SPEED_2, |
| 1541 | PMBUS_READ_FAN_SPEED_3, |
| 1542 | PMBUS_READ_FAN_SPEED_4 |
| 1543 | }; |
| 1544 | |
| 1545 | static const int pmbus_fan_config_registers[] = { |
| 1546 | PMBUS_FAN_CONFIG_12, |
| 1547 | PMBUS_FAN_CONFIG_12, |
| 1548 | PMBUS_FAN_CONFIG_34, |
| 1549 | PMBUS_FAN_CONFIG_34 |
| 1550 | }; |
| 1551 | |
| 1552 | static const int pmbus_fan_status_registers[] = { |
| 1553 | PMBUS_STATUS_FAN_12, |
| 1554 | PMBUS_STATUS_FAN_12, |
| 1555 | PMBUS_STATUS_FAN_34, |
| 1556 | PMBUS_STATUS_FAN_34 |
| 1557 | }; |
| 1558 | |
| 1559 | static const u32 pmbus_fan_flags[] = { |
| 1560 | PMBUS_HAVE_FAN12, |
| 1561 | PMBUS_HAVE_FAN12, |
| 1562 | PMBUS_HAVE_FAN34, |
| 1563 | PMBUS_HAVE_FAN34 |
| 1564 | }; |
| 1565 | |
| 1566 | static const u32 pmbus_fan_status_flags[] = { |
| 1567 | PMBUS_HAVE_STATUS_FAN12, |
| 1568 | PMBUS_HAVE_STATUS_FAN12, |
| 1569 | PMBUS_HAVE_STATUS_FAN34, |
| 1570 | PMBUS_HAVE_STATUS_FAN34 |
| 1571 | }; |
| 1572 | |
| 1573 | /* Fans */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1574 | static int pmbus_add_fan_attributes(struct i2c_client *client, |
| 1575 | struct pmbus_data *data) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1576 | { |
| 1577 | const struct pmbus_driver_info *info = data->info; |
| 1578 | int index = 1; |
| 1579 | int page; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1580 | int ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1581 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1582 | for (page = 0; page < info->pages; page++) { |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1583 | int f; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1584 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1585 | for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1586 | int regval; |
| 1587 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1588 | if (!(info->func[page] & pmbus_fan_flags[f])) |
| 1589 | break; |
| 1590 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1591 | if (!pmbus_check_word_register(client, page, |
Guenter Roeck | 6586b14 | 2011-03-09 07:23:54 -0800 | [diff] [blame] | 1592 | pmbus_fan_registers[f])) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1593 | break; |
| 1594 | |
| 1595 | /* |
| 1596 | * Skip fan if not installed. |
| 1597 | * Each fan configuration register covers multiple fans, |
| 1598 | * so we have to do some magic. |
| 1599 | */ |
Guenter Roeck | 6586b14 | 2011-03-09 07:23:54 -0800 | [diff] [blame] | 1600 | regval = _pmbus_read_byte_data(client, page, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1601 | pmbus_fan_config_registers[f]); |
| 1602 | if (regval < 0 || |
| 1603 | (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) |
| 1604 | continue; |
| 1605 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 1606 | if (pmbus_add_sensor(data, "fan", "input", index, |
| 1607 | page, pmbus_fan_registers[f], |
| 1608 | PSC_FAN, true, true) == NULL) |
| 1609 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1610 | |
| 1611 | /* |
| 1612 | * Each fan status register covers multiple fans, |
| 1613 | * so we have to do some magic. |
| 1614 | */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1615 | if ((info->func[page] & pmbus_fan_status_flags[f]) && |
| 1616 | pmbus_check_byte_register(client, |
| 1617 | page, pmbus_fan_status_registers[f])) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1618 | int base; |
| 1619 | |
| 1620 | if (f > 1) /* fan 3, 4 */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1621 | base = PB_STATUS_FAN34_BASE + page; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1622 | else |
| 1623 | base = PB_STATUS_FAN_BASE + page; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1624 | ret = pmbus_add_boolean(data, "fan", |
| 1625 | "alarm", index, NULL, NULL, base, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1626 | PB_FAN_FAN1_WARNING >> (f & 1)); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1627 | if (ret) |
| 1628 | return ret; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1629 | ret = pmbus_add_boolean(data, "fan", |
| 1630 | "fault", index, NULL, NULL, base, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1631 | PB_FAN_FAN1_FAULT >> (f & 1)); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1632 | if (ret) |
| 1633 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1634 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1635 | index++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1636 | } |
| 1637 | } |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1638 | return 0; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1639 | } |
| 1640 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1641 | static int pmbus_find_attributes(struct i2c_client *client, |
| 1642 | struct pmbus_data *data) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1643 | { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1644 | int ret; |
| 1645 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1646 | /* Voltage sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1647 | ret = pmbus_add_sensor_attrs(client, data, "in", voltage_attributes, |
| 1648 | ARRAY_SIZE(voltage_attributes)); |
| 1649 | if (ret) |
| 1650 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1651 | |
| 1652 | /* Current sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1653 | ret = pmbus_add_sensor_attrs(client, data, "curr", current_attributes, |
| 1654 | ARRAY_SIZE(current_attributes)); |
| 1655 | if (ret) |
| 1656 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1657 | |
| 1658 | /* Power sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1659 | ret = pmbus_add_sensor_attrs(client, data, "power", power_attributes, |
| 1660 | ARRAY_SIZE(power_attributes)); |
| 1661 | if (ret) |
| 1662 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1663 | |
| 1664 | /* Temperature sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1665 | ret = pmbus_add_sensor_attrs(client, data, "temp", temp_attributes, |
| 1666 | ARRAY_SIZE(temp_attributes)); |
| 1667 | if (ret) |
| 1668 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1669 | |
| 1670 | /* Fans */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1671 | ret = pmbus_add_fan_attributes(client, data); |
| 1672 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1673 | } |
| 1674 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1675 | /* |
| 1676 | * Identify chip parameters. |
| 1677 | * This function is called for all chips. |
| 1678 | */ |
| 1679 | static int pmbus_identify_common(struct i2c_client *client, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1680 | struct pmbus_data *data, int page) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1681 | { |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 1682 | int vout_mode = -1; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1683 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1684 | if (pmbus_check_byte_register(client, page, PMBUS_VOUT_MODE)) |
| 1685 | vout_mode = _pmbus_read_byte_data(client, page, |
| 1686 | PMBUS_VOUT_MODE); |
Guenter Roeck | 83274c6 | 2011-03-01 13:49:18 -0800 | [diff] [blame] | 1687 | if (vout_mode >= 0 && vout_mode != 0xff) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1688 | /* |
| 1689 | * Not all chips support the VOUT_MODE command, |
| 1690 | * so a failure to read it is not an error. |
| 1691 | */ |
| 1692 | switch (vout_mode >> 5) { |
| 1693 | case 0: /* linear mode */ |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1694 | if (data->info->format[PSC_VOLTAGE_OUT] != linear) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1695 | return -ENODEV; |
| 1696 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1697 | data->exponent[page] = ((s8)(vout_mode << 3)) >> 3; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1698 | break; |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1699 | case 1: /* VID mode */ |
| 1700 | if (data->info->format[PSC_VOLTAGE_OUT] != vid) |
| 1701 | return -ENODEV; |
| 1702 | break; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1703 | case 2: /* direct mode */ |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1704 | if (data->info->format[PSC_VOLTAGE_OUT] != direct) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1705 | return -ENODEV; |
| 1706 | break; |
| 1707 | default: |
| 1708 | return -ENODEV; |
| 1709 | } |
| 1710 | } |
| 1711 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1712 | pmbus_clear_fault_page(client, page); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1713 | return 0; |
| 1714 | } |
| 1715 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1716 | static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, |
| 1717 | struct pmbus_driver_info *info) |
| 1718 | { |
| 1719 | struct device *dev = &client->dev; |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1720 | int page, ret; |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1721 | |
| 1722 | /* |
| 1723 | * Some PMBus chips don't support PMBUS_STATUS_BYTE, so try |
| 1724 | * to use PMBUS_STATUS_WORD instead if that is the case. |
| 1725 | * Bail out if both registers are not supported. |
| 1726 | */ |
| 1727 | data->status_register = PMBUS_STATUS_BYTE; |
| 1728 | ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE); |
| 1729 | if (ret < 0 || ret == 0xff) { |
| 1730 | data->status_register = PMBUS_STATUS_WORD; |
| 1731 | ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD); |
| 1732 | if (ret < 0 || ret == 0xffff) { |
| 1733 | dev_err(dev, "PMBus status register not found\n"); |
| 1734 | return -ENODEV; |
| 1735 | } |
| 1736 | } |
| 1737 | |
| 1738 | pmbus_clear_faults(client); |
| 1739 | |
| 1740 | if (info->identify) { |
| 1741 | ret = (*info->identify)(client, info); |
| 1742 | if (ret < 0) { |
| 1743 | dev_err(dev, "Chip identification failed\n"); |
| 1744 | return ret; |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | if (info->pages <= 0 || info->pages > PMBUS_PAGES) { |
| 1749 | dev_err(dev, "Bad number of PMBus pages: %d\n", info->pages); |
| 1750 | return -ENODEV; |
| 1751 | } |
| 1752 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1753 | for (page = 0; page < info->pages; page++) { |
| 1754 | ret = pmbus_identify_common(client, data, page); |
| 1755 | if (ret < 0) { |
| 1756 | dev_err(dev, "Failed to identify chip capabilities\n"); |
| 1757 | return ret; |
| 1758 | } |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1759 | } |
| 1760 | return 0; |
| 1761 | } |
| 1762 | |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1763 | #if IS_ENABLED(CONFIG_REGULATOR) |
| 1764 | static int pmbus_regulator_is_enabled(struct regulator_dev *rdev) |
| 1765 | { |
| 1766 | struct device *dev = rdev_get_dev(rdev); |
| 1767 | struct i2c_client *client = to_i2c_client(dev->parent); |
| 1768 | u8 page = rdev_get_id(rdev); |
| 1769 | int ret; |
| 1770 | |
| 1771 | ret = pmbus_read_byte_data(client, page, PMBUS_OPERATION); |
| 1772 | if (ret < 0) |
| 1773 | return ret; |
| 1774 | |
| 1775 | return !!(ret & PB_OPERATION_CONTROL_ON); |
| 1776 | } |
| 1777 | |
| 1778 | static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable) |
| 1779 | { |
| 1780 | struct device *dev = rdev_get_dev(rdev); |
| 1781 | struct i2c_client *client = to_i2c_client(dev->parent); |
| 1782 | u8 page = rdev_get_id(rdev); |
| 1783 | |
| 1784 | return pmbus_update_byte_data(client, page, PMBUS_OPERATION, |
| 1785 | PB_OPERATION_CONTROL_ON, |
| 1786 | enable ? PB_OPERATION_CONTROL_ON : 0); |
| 1787 | } |
| 1788 | |
| 1789 | static int pmbus_regulator_enable(struct regulator_dev *rdev) |
| 1790 | { |
| 1791 | return _pmbus_regulator_on_off(rdev, 1); |
| 1792 | } |
| 1793 | |
| 1794 | static int pmbus_regulator_disable(struct regulator_dev *rdev) |
| 1795 | { |
| 1796 | return _pmbus_regulator_on_off(rdev, 0); |
| 1797 | } |
| 1798 | |
Axel Lin | a07d731 | 2015-07-10 13:00:08 +0800 | [diff] [blame^] | 1799 | const struct regulator_ops pmbus_regulator_ops = { |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1800 | .enable = pmbus_regulator_enable, |
| 1801 | .disable = pmbus_regulator_disable, |
| 1802 | .is_enabled = pmbus_regulator_is_enabled, |
| 1803 | }; |
| 1804 | EXPORT_SYMBOL_GPL(pmbus_regulator_ops); |
| 1805 | |
| 1806 | static int pmbus_regulator_register(struct pmbus_data *data) |
| 1807 | { |
| 1808 | struct device *dev = data->dev; |
| 1809 | const struct pmbus_driver_info *info = data->info; |
| 1810 | const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
| 1811 | struct regulator_dev *rdev; |
| 1812 | int i; |
| 1813 | |
| 1814 | for (i = 0; i < info->num_regulators; i++) { |
| 1815 | struct regulator_config config = { }; |
| 1816 | |
| 1817 | config.dev = dev; |
| 1818 | config.driver_data = data; |
| 1819 | |
| 1820 | if (pdata && pdata->reg_init_data) |
| 1821 | config.init_data = &pdata->reg_init_data[i]; |
| 1822 | |
| 1823 | rdev = devm_regulator_register(dev, &info->reg_desc[i], |
| 1824 | &config); |
| 1825 | if (IS_ERR(rdev)) { |
| 1826 | dev_err(dev, "Failed to register %s regulator\n", |
| 1827 | info->reg_desc[i].name); |
| 1828 | return PTR_ERR(rdev); |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | return 0; |
| 1833 | } |
| 1834 | #else |
| 1835 | static int pmbus_regulator_register(struct pmbus_data *data) |
| 1836 | { |
| 1837 | return 0; |
| 1838 | } |
| 1839 | #endif |
| 1840 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1841 | int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, |
| 1842 | struct pmbus_driver_info *info) |
| 1843 | { |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1844 | struct device *dev = &client->dev; |
Jingoo Han | a8b3a3a | 2013-07-30 17:13:06 +0900 | [diff] [blame] | 1845 | const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1846 | struct pmbus_data *data; |
| 1847 | int ret; |
| 1848 | |
Guenter Roeck | 77493ef | 2013-01-16 10:20:15 -0800 | [diff] [blame] | 1849 | if (!info) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1850 | return -ENODEV; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1851 | |
| 1852 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE |
| 1853 | | I2C_FUNC_SMBUS_BYTE_DATA |
| 1854 | | I2C_FUNC_SMBUS_WORD_DATA)) |
| 1855 | return -ENODEV; |
| 1856 | |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1857 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
Guenter Roeck | 77493ef | 2013-01-16 10:20:15 -0800 | [diff] [blame] | 1858 | if (!data) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1859 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1860 | |
| 1861 | i2c_set_clientdata(client, data); |
| 1862 | mutex_init(&data->update_lock); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1863 | data->dev = dev; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1864 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1865 | if (pdata) |
| 1866 | data->flags = pdata->flags; |
| 1867 | data->info = info; |
| 1868 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1869 | ret = pmbus_init_common(client, data, info); |
| 1870 | if (ret < 0) |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1871 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1872 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1873 | ret = pmbus_find_attributes(client, data); |
| 1874 | if (ret) |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1875 | goto out_kfree; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1876 | |
| 1877 | /* |
| 1878 | * If there are no attributes, something is wrong. |
| 1879 | * Bail out instead of trying to register nothing. |
| 1880 | */ |
| 1881 | if (!data->num_attributes) { |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1882 | dev_err(dev, "No attributes found\n"); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1883 | ret = -ENODEV; |
| 1884 | goto out_kfree; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1885 | } |
| 1886 | |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 1887 | data->groups[0] = &data->group; |
| 1888 | data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name, |
| 1889 | data, data->groups); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1890 | if (IS_ERR(data->hwmon_dev)) { |
| 1891 | ret = PTR_ERR(data->hwmon_dev); |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1892 | dev_err(dev, "Failed to register hwmon device\n"); |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 1893 | goto out_kfree; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1894 | } |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1895 | |
| 1896 | ret = pmbus_regulator_register(data); |
| 1897 | if (ret) |
| 1898 | goto out_unregister; |
| 1899 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1900 | return 0; |
| 1901 | |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1902 | out_unregister: |
| 1903 | hwmon_device_unregister(data->hwmon_dev); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1904 | out_kfree: |
| 1905 | kfree(data->group.attrs); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1906 | return ret; |
| 1907 | } |
| 1908 | EXPORT_SYMBOL_GPL(pmbus_do_probe); |
| 1909 | |
Guenter Roeck | dd285ad | 2012-02-22 08:56:44 -0800 | [diff] [blame] | 1910 | int pmbus_do_remove(struct i2c_client *client) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1911 | { |
| 1912 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 1913 | hwmon_device_unregister(data->hwmon_dev); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1914 | kfree(data->group.attrs); |
Guenter Roeck | dd285ad | 2012-02-22 08:56:44 -0800 | [diff] [blame] | 1915 | return 0; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1916 | } |
| 1917 | EXPORT_SYMBOL_GPL(pmbus_do_remove); |
| 1918 | |
| 1919 | MODULE_AUTHOR("Guenter Roeck"); |
| 1920 | MODULE_DESCRIPTION("PMBus core driver"); |
| 1921 | MODULE_LICENSE("GPL"); |