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> |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 23 | #include <linux/math64.h> |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/err.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/i2c.h> |
| 29 | #include <linux/hwmon.h> |
| 30 | #include <linux/hwmon-sysfs.h> |
Jean Delvare | dcd8f39 | 2012-10-10 15:25:56 +0200 | [diff] [blame] | 31 | #include <linux/jiffies.h> |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 32 | #include <linux/i2c/pmbus.h> |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 33 | #include <linux/regulator/driver.h> |
| 34 | #include <linux/regulator/machine.h> |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 35 | #include "pmbus.h" |
| 36 | |
| 37 | /* |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 38 | * Number of additional attribute pointers to allocate |
| 39 | * with each call to krealloc |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 40 | */ |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 41 | #define PMBUS_ATTR_ALLOC_SIZE 32 |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 42 | |
| 43 | /* |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 44 | * Index into status register array, per status register group |
| 45 | */ |
| 46 | #define PB_STATUS_BASE 0 |
| 47 | #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) |
| 48 | #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) |
| 49 | #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) |
| 50 | #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 51 | #define PB_STATUS_TEMP_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) |
| 52 | #define PB_STATUS_INPUT_BASE (PB_STATUS_TEMP_BASE + PMBUS_PAGES) |
| 53 | #define PB_STATUS_VMON_BASE (PB_STATUS_INPUT_BASE + 1) |
| 54 | |
| 55 | #define PB_NUM_STATUS_REG (PB_STATUS_VMON_BASE + 1) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 56 | |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 57 | #define PMBUS_NAME_SIZE 24 |
| 58 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 59 | struct pmbus_sensor { |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 60 | struct pmbus_sensor *next; |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 61 | char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */ |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 62 | struct device_attribute attribute; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 63 | u8 page; /* page number */ |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 64 | u16 reg; /* register */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 65 | enum pmbus_sensor_classes class; /* sensor class */ |
| 66 | bool update; /* runtime sensor update needed */ |
| 67 | int data; /* Sensor data. |
| 68 | Negative if there was a read error */ |
| 69 | }; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 70 | #define to_pmbus_sensor(_attr) \ |
| 71 | container_of(_attr, struct pmbus_sensor, attribute) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 72 | |
| 73 | struct pmbus_boolean { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 74 | char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 75 | struct sensor_device_attribute attribute; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 76 | struct pmbus_sensor *s1; |
| 77 | struct pmbus_sensor *s2; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 78 | }; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 79 | #define to_pmbus_boolean(_attr) \ |
| 80 | container_of(_attr, struct pmbus_boolean, attribute) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 81 | |
| 82 | struct pmbus_label { |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 83 | char name[PMBUS_NAME_SIZE]; /* sysfs label name */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 84 | struct device_attribute attribute; |
Guenter Roeck | 2bd05bf | 2011-07-09 08:58:49 -0700 | [diff] [blame] | 85 | char label[PMBUS_NAME_SIZE]; /* label */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 86 | }; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 87 | #define to_pmbus_label(_attr) \ |
| 88 | container_of(_attr, struct pmbus_label, attribute) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 89 | |
| 90 | struct pmbus_data { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 91 | struct device *dev; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 92 | struct device *hwmon_dev; |
| 93 | |
| 94 | u32 flags; /* from platform data */ |
| 95 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 96 | int exponent[PMBUS_PAGES]; |
| 97 | /* linear mode: exponent for output voltages */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 98 | |
| 99 | const struct pmbus_driver_info *info; |
| 100 | |
| 101 | int max_attributes; |
| 102 | int num_attributes; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 103 | struct attribute_group group; |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 104 | const struct attribute_group *groups[2]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 105 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 106 | struct pmbus_sensor *sensors; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 107 | |
| 108 | struct mutex update_lock; |
| 109 | bool valid; |
| 110 | unsigned long last_updated; /* in jiffies */ |
| 111 | |
| 112 | /* |
| 113 | * A single status register covers multiple attributes, |
| 114 | * so we keep them all together. |
| 115 | */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 116 | u8 status[PB_NUM_STATUS_REG]; |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 117 | u8 status_register; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 118 | |
| 119 | u8 currpage; |
| 120 | }; |
| 121 | |
Guenter Roeck | ce603b1 | 2013-01-26 15:15:37 -0800 | [diff] [blame] | 122 | void pmbus_clear_cache(struct i2c_client *client) |
| 123 | { |
| 124 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 125 | |
| 126 | data->valid = false; |
| 127 | } |
| 128 | EXPORT_SYMBOL_GPL(pmbus_clear_cache); |
| 129 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 130 | int pmbus_set_page(struct i2c_client *client, u8 page) |
| 131 | { |
| 132 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 133 | int rv = 0; |
| 134 | int newpage; |
| 135 | |
| 136 | if (page != data->currpage) { |
| 137 | rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); |
| 138 | newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); |
| 139 | if (newpage != page) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 140 | rv = -EIO; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 141 | else |
| 142 | data->currpage = page; |
| 143 | } |
| 144 | return rv; |
| 145 | } |
| 146 | EXPORT_SYMBOL_GPL(pmbus_set_page); |
| 147 | |
Guenter Roeck | 03e9bd8 | 2011-07-08 10:43:57 -0700 | [diff] [blame] | 148 | int pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 149 | { |
| 150 | int rv; |
| 151 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 152 | if (page >= 0) { |
| 153 | rv = pmbus_set_page(client, page); |
| 154 | if (rv < 0) |
| 155 | return rv; |
| 156 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 157 | |
| 158 | return i2c_smbus_write_byte(client, value); |
| 159 | } |
Guenter Roeck | 03e9bd8 | 2011-07-08 10:43:57 -0700 | [diff] [blame] | 160 | EXPORT_SYMBOL_GPL(pmbus_write_byte); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 161 | |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 162 | /* |
| 163 | * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if |
LABBE Corentin | 84fb029 | 2013-09-27 14:36:04 +0200 | [diff] [blame] | 164 | * a device specific mapping function exists and calls it if necessary. |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 165 | */ |
| 166 | static int _pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
| 167 | { |
| 168 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 169 | const struct pmbus_driver_info *info = data->info; |
| 170 | int status; |
| 171 | |
| 172 | if (info->write_byte) { |
| 173 | status = info->write_byte(client, page, value); |
| 174 | if (status != -ENODATA) |
| 175 | return status; |
| 176 | } |
| 177 | return pmbus_write_byte(client, page, value); |
| 178 | } |
| 179 | |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 180 | 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] | 181 | { |
| 182 | int rv; |
| 183 | |
| 184 | rv = pmbus_set_page(client, page); |
| 185 | if (rv < 0) |
| 186 | return rv; |
| 187 | |
| 188 | return i2c_smbus_write_word_data(client, reg, word); |
| 189 | } |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 190 | EXPORT_SYMBOL_GPL(pmbus_write_word_data); |
| 191 | |
| 192 | /* |
| 193 | * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if |
| 194 | * a device specific mapping function exists and calls it if necessary. |
| 195 | */ |
| 196 | static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, |
| 197 | u16 word) |
| 198 | { |
| 199 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 200 | const struct pmbus_driver_info *info = data->info; |
| 201 | int status; |
| 202 | |
| 203 | if (info->write_word_data) { |
| 204 | status = info->write_word_data(client, page, reg, word); |
| 205 | if (status != -ENODATA) |
| 206 | return status; |
| 207 | } |
| 208 | if (reg >= PMBUS_VIRT_BASE) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 209 | return -ENXIO; |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 210 | return pmbus_write_word_data(client, page, reg, word); |
| 211 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 212 | |
| 213 | int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) |
| 214 | { |
| 215 | int rv; |
| 216 | |
| 217 | rv = pmbus_set_page(client, page); |
| 218 | if (rv < 0) |
| 219 | return rv; |
| 220 | |
| 221 | return i2c_smbus_read_word_data(client, reg); |
| 222 | } |
| 223 | EXPORT_SYMBOL_GPL(pmbus_read_word_data); |
| 224 | |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 225 | /* |
| 226 | * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if |
| 227 | * a device specific mapping function exists and calls it if necessary. |
| 228 | */ |
| 229 | static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg) |
| 230 | { |
| 231 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 232 | const struct pmbus_driver_info *info = data->info; |
| 233 | int status; |
| 234 | |
| 235 | if (info->read_word_data) { |
| 236 | status = info->read_word_data(client, page, reg); |
| 237 | if (status != -ENODATA) |
| 238 | return status; |
| 239 | } |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 240 | if (reg >= PMBUS_VIRT_BASE) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 241 | return -ENXIO; |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 242 | return pmbus_read_word_data(client, page, reg); |
| 243 | } |
| 244 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 245 | 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] | 246 | { |
| 247 | int rv; |
| 248 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 249 | if (page >= 0) { |
| 250 | rv = pmbus_set_page(client, page); |
| 251 | if (rv < 0) |
| 252 | return rv; |
| 253 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 254 | |
| 255 | return i2c_smbus_read_byte_data(client, reg); |
| 256 | } |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 257 | EXPORT_SYMBOL_GPL(pmbus_read_byte_data); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 258 | |
Alan Tull | 11c1199 | 2014-10-15 13:55:08 -0500 | [diff] [blame] | 259 | int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value) |
| 260 | { |
| 261 | int rv; |
| 262 | |
| 263 | rv = pmbus_set_page(client, page); |
| 264 | if (rv < 0) |
| 265 | return rv; |
| 266 | |
| 267 | return i2c_smbus_write_byte_data(client, reg, value); |
| 268 | } |
| 269 | EXPORT_SYMBOL_GPL(pmbus_write_byte_data); |
| 270 | |
| 271 | int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, |
| 272 | u8 mask, u8 value) |
| 273 | { |
| 274 | unsigned int tmp; |
| 275 | int rv; |
| 276 | |
| 277 | rv = pmbus_read_byte_data(client, page, reg); |
| 278 | if (rv < 0) |
| 279 | return rv; |
| 280 | |
| 281 | tmp = (rv & ~mask) | (value & mask); |
| 282 | |
| 283 | if (tmp != rv) |
| 284 | rv = pmbus_write_byte_data(client, page, reg, tmp); |
| 285 | |
| 286 | return rv; |
| 287 | } |
| 288 | EXPORT_SYMBOL_GPL(pmbus_update_byte_data); |
| 289 | |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 290 | /* |
| 291 | * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if |
| 292 | * a device specific mapping function exists and calls it if necessary. |
| 293 | */ |
| 294 | static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) |
| 295 | { |
| 296 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 297 | const struct pmbus_driver_info *info = data->info; |
| 298 | int status; |
| 299 | |
| 300 | if (info->read_byte_data) { |
| 301 | status = info->read_byte_data(client, page, reg); |
| 302 | if (status != -ENODATA) |
| 303 | return status; |
| 304 | } |
| 305 | return pmbus_read_byte_data(client, page, reg); |
| 306 | } |
| 307 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 308 | static void pmbus_clear_fault_page(struct i2c_client *client, int page) |
| 309 | { |
Guenter Roeck | 044cd3a | 2011-07-29 22:08:07 -0700 | [diff] [blame] | 310 | _pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | void pmbus_clear_faults(struct i2c_client *client) |
| 314 | { |
| 315 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 316 | int i; |
| 317 | |
| 318 | for (i = 0; i < data->info->pages; i++) |
| 319 | pmbus_clear_fault_page(client, i); |
| 320 | } |
| 321 | EXPORT_SYMBOL_GPL(pmbus_clear_faults); |
| 322 | |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 323 | static int pmbus_check_status_cml(struct i2c_client *client) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 324 | { |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 325 | struct pmbus_data *data = i2c_get_clientdata(client); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 326 | int status, status2; |
| 327 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 328 | status = _pmbus_read_byte_data(client, -1, data->status_register); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 329 | if (status < 0 || (status & PB_STATUS_CML)) { |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 330 | status2 = _pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 331 | if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) |
Guenter Roeck | 179144a | 2011-09-01 08:34:31 -0700 | [diff] [blame] | 332 | return -EIO; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 333 | } |
| 334 | return 0; |
| 335 | } |
| 336 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 337 | static bool pmbus_check_register(struct i2c_client *client, |
| 338 | int (*func)(struct i2c_client *client, |
| 339 | int page, int reg), |
| 340 | int page, int reg) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 341 | { |
| 342 | int rv; |
| 343 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 344 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 345 | rv = func(client, page, reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 346 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
Guenter Roeck | 9c1ed89 | 2011-07-09 07:41:01 -0700 | [diff] [blame] | 347 | rv = pmbus_check_status_cml(client); |
| 348 | pmbus_clear_fault_page(client, -1); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 349 | return rv >= 0; |
| 350 | } |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 351 | |
| 352 | bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) |
| 353 | { |
| 354 | return pmbus_check_register(client, _pmbus_read_byte_data, page, reg); |
| 355 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 356 | EXPORT_SYMBOL_GPL(pmbus_check_byte_register); |
| 357 | |
| 358 | bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) |
| 359 | { |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 360 | return pmbus_check_register(client, _pmbus_read_word_data, page, reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 361 | } |
| 362 | EXPORT_SYMBOL_GPL(pmbus_check_word_register); |
| 363 | |
| 364 | const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) |
| 365 | { |
| 366 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 367 | |
| 368 | return data->info; |
| 369 | } |
| 370 | EXPORT_SYMBOL_GPL(pmbus_get_driver_info); |
| 371 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 372 | static struct _pmbus_status { |
| 373 | u32 func; |
| 374 | u16 base; |
| 375 | u16 reg; |
| 376 | } pmbus_status[] = { |
| 377 | { PMBUS_HAVE_STATUS_VOUT, PB_STATUS_VOUT_BASE, PMBUS_STATUS_VOUT }, |
| 378 | { PMBUS_HAVE_STATUS_IOUT, PB_STATUS_IOUT_BASE, PMBUS_STATUS_IOUT }, |
| 379 | { PMBUS_HAVE_STATUS_TEMP, PB_STATUS_TEMP_BASE, |
| 380 | PMBUS_STATUS_TEMPERATURE }, |
| 381 | { PMBUS_HAVE_STATUS_FAN12, PB_STATUS_FAN_BASE, PMBUS_STATUS_FAN_12 }, |
| 382 | { PMBUS_HAVE_STATUS_FAN34, PB_STATUS_FAN34_BASE, PMBUS_STATUS_FAN_34 }, |
| 383 | }; |
| 384 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 385 | static struct pmbus_data *pmbus_update_device(struct device *dev) |
| 386 | { |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 387 | struct i2c_client *client = to_i2c_client(dev->parent); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 388 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 389 | const struct pmbus_driver_info *info = data->info; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 390 | struct pmbus_sensor *sensor; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 391 | |
| 392 | mutex_lock(&data->update_lock); |
| 393 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 394 | int i, j; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 395 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 396 | for (i = 0; i < info->pages; i++) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 397 | data->status[PB_STATUS_BASE + i] |
Guenter Roeck | da8e48a | 2011-07-29 22:19:39 -0700 | [diff] [blame] | 398 | = _pmbus_read_byte_data(client, i, |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 399 | data->status_register); |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 400 | for (j = 0; j < ARRAY_SIZE(pmbus_status); j++) { |
| 401 | struct _pmbus_status *s = &pmbus_status[j]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 402 | |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 403 | if (!(info->func[i] & s->func)) |
| 404 | continue; |
| 405 | data->status[s->base + i] |
| 406 | = _pmbus_read_byte_data(client, i, |
| 407 | s->reg); |
| 408 | } |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 409 | } |
| 410 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 411 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) |
| 412 | data->status[PB_STATUS_INPUT_BASE] |
Guenter Roeck | 2cfa6ae | 2011-03-08 23:00:10 -0800 | [diff] [blame] | 413 | = _pmbus_read_byte_data(client, 0, |
| 414 | PMBUS_STATUS_INPUT); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 415 | |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 416 | if (info->func[0] & PMBUS_HAVE_STATUS_VMON) |
| 417 | data->status[PB_STATUS_VMON_BASE] |
| 418 | = _pmbus_read_byte_data(client, 0, |
| 419 | PMBUS_VIRT_STATUS_VMON); |
| 420 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 421 | for (sensor = data->sensors; sensor; sensor = sensor->next) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 422 | if (!data->valid || sensor->update) |
| 423 | sensor->data |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 424 | = _pmbus_read_word_data(client, |
| 425 | sensor->page, |
| 426 | sensor->reg); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 427 | } |
| 428 | pmbus_clear_faults(client); |
| 429 | data->last_updated = jiffies; |
| 430 | data->valid = 1; |
| 431 | } |
| 432 | mutex_unlock(&data->update_lock); |
| 433 | return data; |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Convert linear sensor values to milli- or micro-units |
| 438 | * depending on sensor type. |
| 439 | */ |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 440 | static long pmbus_reg2data_linear(struct pmbus_data *data, |
| 441 | struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 442 | { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 443 | s16 exponent; |
| 444 | s32 mantissa; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 445 | long val; |
| 446 | |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 447 | if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 448 | exponent = data->exponent[sensor->page]; |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 449 | mantissa = (u16) sensor->data; |
| 450 | } else { /* LINEAR11 */ |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 451 | exponent = ((s16)sensor->data) >> 11; |
| 452 | mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | val = mantissa; |
| 456 | |
| 457 | /* scale result to milli-units for all sensors except fans */ |
| 458 | if (sensor->class != PSC_FAN) |
| 459 | val = val * 1000L; |
| 460 | |
| 461 | /* scale result to micro-units for power sensors */ |
| 462 | if (sensor->class == PSC_POWER) |
| 463 | val = val * 1000L; |
| 464 | |
| 465 | if (exponent >= 0) |
| 466 | val <<= exponent; |
| 467 | else |
| 468 | val >>= -exponent; |
| 469 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 470 | return val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | /* |
| 474 | * Convert direct sensor values to milli- or micro-units |
| 475 | * depending on sensor type. |
| 476 | */ |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 477 | static long pmbus_reg2data_direct(struct pmbus_data *data, |
| 478 | struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 479 | { |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 480 | s64 b, val = (s16)sensor->data; |
| 481 | s32 m, R; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 482 | |
| 483 | m = data->info->m[sensor->class]; |
| 484 | b = data->info->b[sensor->class]; |
| 485 | R = data->info->R[sensor->class]; |
| 486 | |
| 487 | if (m == 0) |
| 488 | return 0; |
| 489 | |
| 490 | /* X = 1/m * (Y * 10^-R - b) */ |
| 491 | R = -R; |
| 492 | /* scale result to milli-units for everything but fans */ |
| 493 | if (sensor->class != PSC_FAN) { |
| 494 | R += 3; |
| 495 | b *= 1000; |
| 496 | } |
| 497 | |
| 498 | /* scale result to micro-units for power sensors */ |
| 499 | if (sensor->class == PSC_POWER) { |
| 500 | R += 3; |
| 501 | b *= 1000; |
| 502 | } |
| 503 | |
| 504 | while (R > 0) { |
| 505 | val *= 10; |
| 506 | R--; |
| 507 | } |
| 508 | while (R < 0) { |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 509 | val = div_s64(val + 5LL, 10L); /* round closest */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 510 | R++; |
| 511 | } |
| 512 | |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 513 | val = div_s64(val - b, m); |
| 514 | return clamp_val(val, LONG_MIN, LONG_MAX); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 515 | } |
| 516 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 517 | /* |
| 518 | * Convert VID sensor values to milli- or micro-units |
| 519 | * depending on sensor type. |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 520 | */ |
| 521 | static long pmbus_reg2data_vid(struct pmbus_data *data, |
| 522 | struct pmbus_sensor *sensor) |
| 523 | { |
| 524 | long val = sensor->data; |
Guenter Roeck | 068c227 | 2015-07-20 09:47:33 -0700 | [diff] [blame] | 525 | long rv = 0; |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 526 | |
Guenter Roeck | 068c227 | 2015-07-20 09:47:33 -0700 | [diff] [blame] | 527 | switch (data->info->vrm_version) { |
| 528 | case vr11: |
| 529 | if (val >= 0x02 && val <= 0xb2) |
| 530 | rv = DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100); |
| 531 | break; |
| 532 | case vr12: |
| 533 | if (val >= 0x01) |
| 534 | rv = 250 + (val - 1) * 5; |
| 535 | break; |
| 536 | } |
| 537 | return rv; |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 538 | } |
| 539 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 540 | static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 541 | { |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 542 | long val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 543 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 544 | switch (data->info->format[sensor->class]) { |
| 545 | case direct: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 546 | val = pmbus_reg2data_direct(data, sensor); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 547 | break; |
| 548 | case vid: |
| 549 | val = pmbus_reg2data_vid(data, sensor); |
| 550 | break; |
| 551 | case linear: |
| 552 | default: |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 553 | val = pmbus_reg2data_linear(data, sensor); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 554 | break; |
| 555 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 556 | return val; |
| 557 | } |
| 558 | |
| 559 | #define MAX_MANTISSA (1023 * 1000) |
| 560 | #define MIN_MANTISSA (511 * 1000) |
| 561 | |
| 562 | static u16 pmbus_data2reg_linear(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 563 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 564 | { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 565 | s16 exponent = 0, mantissa; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 566 | bool negative = false; |
| 567 | |
| 568 | /* simple case */ |
| 569 | if (val == 0) |
| 570 | return 0; |
| 571 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 572 | if (sensor->class == PSC_VOLTAGE_OUT) { |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 573 | /* LINEAR16 does not support negative voltages */ |
| 574 | if (val < 0) |
| 575 | return 0; |
| 576 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 577 | /* |
| 578 | * For a static exponents, we don't have a choice |
| 579 | * but to adjust the value to it. |
| 580 | */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 581 | if (data->exponent[sensor->page] < 0) |
| 582 | val <<= -data->exponent[sensor->page]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 583 | else |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 584 | val >>= data->exponent[sensor->page]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 585 | val = DIV_ROUND_CLOSEST(val, 1000); |
Guenter Roeck | 9f6ad1c | 2011-03-07 18:34:50 -0800 | [diff] [blame] | 586 | return val & 0xffff; |
| 587 | } |
| 588 | |
| 589 | if (val < 0) { |
| 590 | negative = true; |
| 591 | val = -val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | /* Power is in uW. Convert to mW before converting. */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 595 | if (sensor->class == PSC_POWER) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 596 | val = DIV_ROUND_CLOSEST(val, 1000L); |
| 597 | |
| 598 | /* |
| 599 | * For simplicity, convert fan data to milli-units |
| 600 | * before calculating the exponent. |
| 601 | */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 602 | if (sensor->class == PSC_FAN) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 603 | val = val * 1000; |
| 604 | |
| 605 | /* Reduce large mantissa until it fits into 10 bit */ |
| 606 | while (val >= MAX_MANTISSA && exponent < 15) { |
| 607 | exponent++; |
| 608 | val >>= 1; |
| 609 | } |
| 610 | /* Increase small mantissa to improve precision */ |
| 611 | while (val < MIN_MANTISSA && exponent > -15) { |
| 612 | exponent--; |
| 613 | val <<= 1; |
| 614 | } |
| 615 | |
| 616 | /* Convert mantissa from milli-units to units */ |
| 617 | mantissa = DIV_ROUND_CLOSEST(val, 1000); |
| 618 | |
| 619 | /* Ensure that resulting number is within range */ |
| 620 | if (mantissa > 0x3ff) |
| 621 | mantissa = 0x3ff; |
| 622 | |
| 623 | /* restore sign */ |
| 624 | if (negative) |
| 625 | mantissa = -mantissa; |
| 626 | |
| 627 | /* Convert to 5 bit exponent, 11 bit mantissa */ |
| 628 | return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); |
| 629 | } |
| 630 | |
| 631 | static u16 pmbus_data2reg_direct(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 632 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 633 | { |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 634 | s64 b, val64 = val; |
| 635 | s32 m, R; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 636 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 637 | m = data->info->m[sensor->class]; |
| 638 | b = data->info->b[sensor->class]; |
| 639 | R = data->info->R[sensor->class]; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 640 | |
| 641 | /* Power is in uW. Adjust R and b. */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 642 | if (sensor->class == PSC_POWER) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 643 | R -= 3; |
| 644 | b *= 1000; |
| 645 | } |
| 646 | |
| 647 | /* Calculate Y = (m * X + b) * 10^R */ |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 648 | if (sensor->class != PSC_FAN) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 649 | R -= 3; /* Adjust R and b for data in milli-units */ |
| 650 | b *= 1000; |
| 651 | } |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 652 | val64 = val64 * m + b; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 653 | |
| 654 | while (R > 0) { |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 655 | val64 *= 10; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 656 | R--; |
| 657 | } |
| 658 | while (R < 0) { |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 659 | val64 = div_s64(val64 + 5LL, 10L); /* round closest */ |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 660 | R++; |
| 661 | } |
| 662 | |
Robert Lippert | d5a746c | 2017-11-27 15:51:55 -0800 | [diff] [blame] | 663 | return (u16)clamp_val(val64, S16_MIN, S16_MAX); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 664 | } |
| 665 | |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 666 | static u16 pmbus_data2reg_vid(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 667 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 668 | { |
Guenter Roeck | 2a844c1 | 2013-01-09 08:09:34 -0800 | [diff] [blame] | 669 | val = clamp_val(val, 500, 1600); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 670 | |
| 671 | return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625); |
| 672 | } |
| 673 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 674 | static u16 pmbus_data2reg(struct pmbus_data *data, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 675 | struct pmbus_sensor *sensor, long val) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 676 | { |
| 677 | u16 regval; |
| 678 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 679 | switch (data->info->format[sensor->class]) { |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 680 | case direct: |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 681 | regval = pmbus_data2reg_direct(data, sensor, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 682 | break; |
| 683 | case vid: |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 684 | regval = pmbus_data2reg_vid(data, sensor, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 685 | break; |
| 686 | case linear: |
| 687 | default: |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 688 | regval = pmbus_data2reg_linear(data, sensor, val); |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 689 | break; |
| 690 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 691 | return regval; |
| 692 | } |
| 693 | |
| 694 | /* |
| 695 | * Return boolean calculated from converted data. |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 696 | * <index> defines a status register index and mask. |
| 697 | * 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] | 698 | * |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 699 | * The associated pmbus_boolean structure contains optional pointers to two |
| 700 | * sensor attributes. If specified, those attributes are compared against each |
| 701 | * other to determine if a limit has been exceeded. |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 702 | * |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 703 | * If the sensor attribute pointers are NULL, the function returns true if |
| 704 | * (status[reg] & mask) is true. |
| 705 | * |
| 706 | * If sensor attribute pointers are provided, a comparison against a specified |
| 707 | * limit has to be performed to determine the boolean result. |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 708 | * 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] | 709 | * sensor values referenced by sensor attribute pointers s1 and s2). |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 710 | * |
| 711 | * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. |
| 712 | * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. |
| 713 | * |
| 714 | * If a negative value is stored in any of the referenced registers, this value |
| 715 | * reflects an error code which will be returned. |
| 716 | */ |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 717 | static int pmbus_get_boolean(struct pmbus_data *data, struct pmbus_boolean *b, |
| 718 | int index) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 719 | { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 720 | struct pmbus_sensor *s1 = b->s1; |
| 721 | struct pmbus_sensor *s2 = b->s2; |
| 722 | u16 reg = (index >> 8) & 0xffff; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 723 | u8 mask = index & 0xff; |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 724 | int ret, status; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 725 | u8 regval; |
| 726 | |
| 727 | status = data->status[reg]; |
| 728 | if (status < 0) |
| 729 | return status; |
| 730 | |
| 731 | regval = status & mask; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 732 | if (!s1 && !s2) { |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 733 | ret = !!regval; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 734 | } else if (!s1 || !s2) { |
Guenter Roeck | af78fdf | 2013-09-13 10:31:38 -0700 | [diff] [blame] | 735 | 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] | 736 | return 0; |
| 737 | } else { |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 738 | long v1, v2; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 739 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 740 | if (s1->data < 0) |
| 741 | return s1->data; |
| 742 | if (s2->data < 0) |
| 743 | return s2->data; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 744 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 745 | v1 = pmbus_reg2data(data, s1); |
| 746 | v2 = pmbus_reg2data(data, s2); |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 747 | ret = !!(regval && v1 >= v2); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 748 | } |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 749 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | static ssize_t pmbus_show_boolean(struct device *dev, |
| 753 | struct device_attribute *da, char *buf) |
| 754 | { |
| 755 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 756 | struct pmbus_boolean *boolean = to_pmbus_boolean(attr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 757 | struct pmbus_data *data = pmbus_update_device(dev); |
| 758 | int val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 759 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 760 | val = pmbus_get_boolean(data, boolean, attr->index); |
Guenter Roeck | d7ee111 | 2012-03-28 09:14:03 -0700 | [diff] [blame] | 761 | if (val < 0) |
| 762 | return val; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 763 | return snprintf(buf, PAGE_SIZE, "%d\n", val); |
| 764 | } |
| 765 | |
| 766 | static ssize_t pmbus_show_sensor(struct device *dev, |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 767 | struct device_attribute *devattr, char *buf) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 768 | { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 769 | struct pmbus_data *data = pmbus_update_device(dev); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 770 | struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 771 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 772 | if (sensor->data < 0) |
| 773 | return sensor->data; |
| 774 | |
Guenter Roeck | f450c150 | 2011-07-10 19:31:29 -0700 | [diff] [blame] | 775 | return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor)); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | static ssize_t pmbus_set_sensor(struct device *dev, |
| 779 | struct device_attribute *devattr, |
| 780 | const char *buf, size_t count) |
| 781 | { |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 782 | struct i2c_client *client = to_i2c_client(dev->parent); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 783 | struct pmbus_data *data = i2c_get_clientdata(client); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 784 | struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 785 | ssize_t rv = count; |
| 786 | long val = 0; |
| 787 | int ret; |
| 788 | u16 regval; |
| 789 | |
Guenter Roeck | 0117c3f | 2012-01-16 10:14:54 -0800 | [diff] [blame] | 790 | if (kstrtol(buf, 10, &val) < 0) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 791 | return -EINVAL; |
| 792 | |
| 793 | mutex_lock(&data->update_lock); |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 794 | regval = pmbus_data2reg(data, sensor, val); |
Guenter Roeck | 46243f3 | 2011-07-08 10:41:24 -0700 | [diff] [blame] | 795 | ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 796 | if (ret < 0) |
| 797 | rv = ret; |
| 798 | else |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 799 | sensor->data = regval; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 800 | mutex_unlock(&data->update_lock); |
| 801 | return rv; |
| 802 | } |
| 803 | |
| 804 | static ssize_t pmbus_show_label(struct device *dev, |
| 805 | struct device_attribute *da, char *buf) |
| 806 | { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 807 | struct pmbus_label *label = to_pmbus_label(da); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 808 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 809 | return snprintf(buf, PAGE_SIZE, "%s\n", label->label); |
| 810 | } |
| 811 | |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 812 | static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr) |
| 813 | { |
| 814 | if (data->num_attributes >= data->max_attributes - 1) { |
David Woodhouse | 6975404 | 2013-03-14 13:30:20 +0000 | [diff] [blame] | 815 | int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE; |
| 816 | void *new_attrs = krealloc(data->group.attrs, |
| 817 | new_max_attrs * sizeof(void *), |
| 818 | GFP_KERNEL); |
| 819 | if (!new_attrs) |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 820 | return -ENOMEM; |
David Woodhouse | 6975404 | 2013-03-14 13:30:20 +0000 | [diff] [blame] | 821 | data->group.attrs = new_attrs; |
| 822 | data->max_attributes = new_max_attrs; |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | data->group.attrs[data->num_attributes++] = attr; |
| 826 | data->group.attrs[data->num_attributes] = NULL; |
| 827 | return 0; |
| 828 | } |
| 829 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 830 | static void pmbus_dev_attr_init(struct device_attribute *dev_attr, |
| 831 | const char *name, |
| 832 | umode_t mode, |
| 833 | ssize_t (*show)(struct device *dev, |
| 834 | struct device_attribute *attr, |
| 835 | char *buf), |
| 836 | ssize_t (*store)(struct device *dev, |
| 837 | struct device_attribute *attr, |
| 838 | const char *buf, size_t count)) |
| 839 | { |
| 840 | sysfs_attr_init(&dev_attr->attr); |
| 841 | dev_attr->attr.name = name; |
| 842 | dev_attr->attr.mode = mode; |
| 843 | dev_attr->show = show; |
| 844 | dev_attr->store = store; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 845 | } |
| 846 | |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 847 | static void pmbus_attr_init(struct sensor_device_attribute *a, |
| 848 | const char *name, |
| 849 | umode_t mode, |
| 850 | ssize_t (*show)(struct device *dev, |
| 851 | struct device_attribute *attr, |
| 852 | char *buf), |
| 853 | ssize_t (*store)(struct device *dev, |
| 854 | struct device_attribute *attr, |
| 855 | const char *buf, size_t count), |
| 856 | int idx) |
| 857 | { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 858 | pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store); |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 859 | a->index = idx; |
| 860 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 861 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 862 | static int pmbus_add_boolean(struct pmbus_data *data, |
| 863 | const char *name, const char *type, int seq, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 864 | struct pmbus_sensor *s1, |
| 865 | struct pmbus_sensor *s2, |
| 866 | u16 reg, u8 mask) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 867 | { |
| 868 | struct pmbus_boolean *boolean; |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 869 | struct sensor_device_attribute *a; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 870 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 871 | boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL); |
| 872 | if (!boolean) |
| 873 | return -ENOMEM; |
| 874 | |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 875 | a = &boolean->attribute; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 876 | |
| 877 | snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", |
| 878 | name, seq, type); |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 879 | boolean->s1 = s1; |
| 880 | boolean->s2 = s2; |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 881 | pmbus_attr_init(a, boolean->name, S_IRUGO, pmbus_show_boolean, NULL, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 882 | (reg << 8) | mask); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 883 | |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 884 | return pmbus_add_attribute(data, &a->dev_attr.attr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 885 | } |
| 886 | |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 887 | static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, |
| 888 | const char *name, const char *type, |
| 889 | int seq, int page, int reg, |
| 890 | enum pmbus_sensor_classes class, |
| 891 | bool update, bool readonly) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 892 | { |
| 893 | struct pmbus_sensor *sensor; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 894 | struct device_attribute *a; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 895 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 896 | sensor = devm_kzalloc(data->dev, sizeof(*sensor), GFP_KERNEL); |
| 897 | if (!sensor) |
| 898 | return NULL; |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 899 | a = &sensor->attribute; |
| 900 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 901 | snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", |
| 902 | name, seq, type); |
| 903 | sensor->page = page; |
| 904 | sensor->reg = reg; |
| 905 | sensor->class = class; |
| 906 | sensor->update = update; |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 907 | pmbus_dev_attr_init(a, sensor->name, |
| 908 | readonly ? S_IRUGO : S_IRUGO | S_IWUSR, |
| 909 | pmbus_show_sensor, pmbus_set_sensor); |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 910 | |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 911 | if (pmbus_add_attribute(data, &a->attr)) |
| 912 | return NULL; |
| 913 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 914 | sensor->next = data->sensors; |
| 915 | data->sensors = sensor; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 916 | |
| 917 | return sensor; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 918 | } |
| 919 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 920 | static int pmbus_add_label(struct pmbus_data *data, |
| 921 | const char *name, int seq, |
| 922 | const char *lstring, int index) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 923 | { |
| 924 | struct pmbus_label *label; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 925 | struct device_attribute *a; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 926 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 927 | label = devm_kzalloc(data->dev, sizeof(*label), GFP_KERNEL); |
| 928 | if (!label) |
| 929 | return -ENOMEM; |
| 930 | |
Guenter Roeck | 973018b | 2013-01-19 20:59:04 -0800 | [diff] [blame] | 931 | a = &label->attribute; |
| 932 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 933 | snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); |
| 934 | if (!index) |
| 935 | strncpy(label->label, lstring, sizeof(label->label) - 1); |
| 936 | else |
| 937 | snprintf(label->label, sizeof(label->label), "%s%d", lstring, |
| 938 | index); |
| 939 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 940 | 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] | 941 | return pmbus_add_attribute(data, &a->attr); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 942 | } |
| 943 | |
| 944 | /* |
| 945 | * Search for attributes. Allocate sensors, booleans, and labels as needed. |
| 946 | */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 947 | |
| 948 | /* |
| 949 | * The pmbus_limit_attr structure describes a single limit attribute |
| 950 | * and its associated alarm attribute. |
| 951 | */ |
| 952 | struct pmbus_limit_attr { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 953 | u16 reg; /* Limit register */ |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 954 | u16 sbit; /* Alarm attribute status bit */ |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 955 | bool update; /* True if register needs updates */ |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 956 | bool low; /* True if low limit; for limits with compare |
| 957 | functions only */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 958 | const char *attr; /* Attribute name */ |
| 959 | const char *alarm; /* Alarm attribute name */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 960 | }; |
| 961 | |
| 962 | /* |
| 963 | * The pmbus_sensor_attr structure describes one sensor attribute. This |
| 964 | * description includes a reference to the associated limit attributes. |
| 965 | */ |
| 966 | struct pmbus_sensor_attr { |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 967 | u16 reg; /* sensor register */ |
Guenter Roeck | f880b12 | 2013-01-22 16:26:46 -0800 | [diff] [blame] | 968 | u8 gbit; /* generic status bit */ |
| 969 | u8 nlimit; /* # of limit registers */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 970 | enum pmbus_sensor_classes class;/* sensor class */ |
| 971 | const char *label; /* sensor label */ |
| 972 | bool paged; /* true if paged sensor */ |
| 973 | bool update; /* true if update needed */ |
| 974 | bool compare; /* true if compare function needed */ |
| 975 | u32 func; /* sensor mask */ |
| 976 | u32 sfunc; /* sensor status mask */ |
| 977 | int sbase; /* status base register */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 978 | const struct pmbus_limit_attr *limit;/* limit registers */ |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 979 | }; |
| 980 | |
| 981 | /* |
| 982 | * Add a set of limit attributes and, if supported, the associated |
| 983 | * alarm attributes. |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 984 | * returns 0 if no alarm register found, 1 if an alarm register was found, |
| 985 | * < 0 on errors. |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 986 | */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 987 | static int pmbus_add_limit_attrs(struct i2c_client *client, |
| 988 | struct pmbus_data *data, |
| 989 | const struct pmbus_driver_info *info, |
| 990 | const char *name, int index, int page, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 991 | struct pmbus_sensor *base, |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 992 | const struct pmbus_sensor_attr *attr) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 993 | { |
| 994 | const struct pmbus_limit_attr *l = attr->limit; |
| 995 | int nlimit = attr->nlimit; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 996 | int have_alarm = 0; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 997 | int i, ret; |
| 998 | struct pmbus_sensor *curr; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 999 | |
| 1000 | for (i = 0; i < nlimit; i++) { |
| 1001 | if (pmbus_check_word_register(client, page, l->reg)) { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1002 | curr = pmbus_add_sensor(data, name, l->attr, index, |
| 1003 | page, l->reg, attr->class, |
| 1004 | attr->update || l->update, |
| 1005 | false); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 1006 | if (!curr) |
| 1007 | return -ENOMEM; |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1008 | if (l->sbit && (info->func[page] & attr->sfunc)) { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1009 | ret = pmbus_add_boolean(data, name, |
| 1010 | l->alarm, index, |
| 1011 | attr->compare ? l->low ? curr : base |
| 1012 | : NULL, |
| 1013 | attr->compare ? l->low ? base : curr |
| 1014 | : NULL, |
| 1015 | attr->sbase + page, l->sbit); |
| 1016 | if (ret) |
| 1017 | return ret; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1018 | have_alarm = 1; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1019 | } |
| 1020 | } |
| 1021 | l++; |
| 1022 | } |
| 1023 | return have_alarm; |
| 1024 | } |
| 1025 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1026 | static int pmbus_add_sensor_attrs_one(struct i2c_client *client, |
| 1027 | struct pmbus_data *data, |
| 1028 | const struct pmbus_driver_info *info, |
| 1029 | const char *name, |
| 1030 | int index, int page, |
| 1031 | const struct pmbus_sensor_attr *attr) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1032 | { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1033 | struct pmbus_sensor *base; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1034 | int ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1035 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1036 | if (attr->label) { |
| 1037 | ret = pmbus_add_label(data, name, index, attr->label, |
| 1038 | attr->paged ? page + 1 : 0); |
| 1039 | if (ret) |
| 1040 | return ret; |
| 1041 | } |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1042 | base = pmbus_add_sensor(data, name, "input", index, page, attr->reg, |
| 1043 | attr->class, true, true); |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 1044 | if (!base) |
| 1045 | return -ENOMEM; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1046 | if (attr->sfunc) { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1047 | ret = pmbus_add_limit_attrs(client, data, info, name, |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1048 | index, page, base, attr); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1049 | if (ret < 0) |
| 1050 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1051 | /* |
| 1052 | * Add generic alarm attribute only if there are no individual |
Guenter Roeck | c6bfb76 | 2011-07-09 12:06:45 -0700 | [diff] [blame] | 1053 | * alarm attributes, if there is a global alarm bit, and if |
| 1054 | * the generic status register for this page is accessible. |
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 | if (!ret && attr->gbit && |
| 1057 | pmbus_check_byte_register(client, page, |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1058 | data->status_register)) { |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1059 | ret = pmbus_add_boolean(data, name, "alarm", index, |
| 1060 | NULL, NULL, |
| 1061 | PB_STATUS_BASE + page, |
| 1062 | attr->gbit); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1063 | if (ret) |
| 1064 | return ret; |
| 1065 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1066 | } |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1067 | return 0; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1068 | } |
| 1069 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1070 | static int pmbus_add_sensor_attrs(struct i2c_client *client, |
| 1071 | struct pmbus_data *data, |
| 1072 | const char *name, |
| 1073 | const struct pmbus_sensor_attr *attrs, |
| 1074 | int nattrs) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1075 | { |
| 1076 | const struct pmbus_driver_info *info = data->info; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1077 | int index, i; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1078 | int ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1079 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1080 | index = 1; |
| 1081 | for (i = 0; i < nattrs; i++) { |
| 1082 | int page, pages; |
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 | pages = attrs->paged ? info->pages : 1; |
| 1085 | for (page = 0; page < pages; page++) { |
| 1086 | if (!(info->func[page] & attrs->func)) |
Guenter Roeck | b49547a | 2011-03-06 10:56:52 -0800 | [diff] [blame] | 1087 | continue; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1088 | ret = pmbus_add_sensor_attrs_one(client, data, info, |
| 1089 | name, index, page, |
| 1090 | attrs); |
| 1091 | if (ret) |
| 1092 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1093 | index++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1094 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1095 | attrs++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1096 | } |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1097 | return 0; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1098 | } |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1099 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1100 | static const struct pmbus_limit_attr vin_limit_attrs[] = { |
| 1101 | { |
| 1102 | .reg = PMBUS_VIN_UV_WARN_LIMIT, |
| 1103 | .attr = "min", |
| 1104 | .alarm = "min_alarm", |
| 1105 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1106 | }, { |
| 1107 | .reg = PMBUS_VIN_UV_FAULT_LIMIT, |
| 1108 | .attr = "lcrit", |
| 1109 | .alarm = "lcrit_alarm", |
| 1110 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1111 | }, { |
| 1112 | .reg = PMBUS_VIN_OV_WARN_LIMIT, |
| 1113 | .attr = "max", |
| 1114 | .alarm = "max_alarm", |
| 1115 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1116 | }, { |
| 1117 | .reg = PMBUS_VIN_OV_FAULT_LIMIT, |
| 1118 | .attr = "crit", |
| 1119 | .alarm = "crit_alarm", |
| 1120 | .sbit = PB_VOLTAGE_OV_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1121 | }, { |
| 1122 | .reg = PMBUS_VIRT_READ_VIN_AVG, |
| 1123 | .update = true, |
| 1124 | .attr = "average", |
| 1125 | }, { |
| 1126 | .reg = PMBUS_VIRT_READ_VIN_MIN, |
| 1127 | .update = true, |
| 1128 | .attr = "lowest", |
| 1129 | }, { |
| 1130 | .reg = PMBUS_VIRT_READ_VIN_MAX, |
| 1131 | .update = true, |
| 1132 | .attr = "highest", |
| 1133 | }, { |
| 1134 | .reg = PMBUS_VIRT_RESET_VIN_HISTORY, |
| 1135 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1136 | }, |
| 1137 | }; |
| 1138 | |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 1139 | static const struct pmbus_limit_attr vmon_limit_attrs[] = { |
| 1140 | { |
| 1141 | .reg = PMBUS_VIRT_VMON_UV_WARN_LIMIT, |
| 1142 | .attr = "min", |
| 1143 | .alarm = "min_alarm", |
| 1144 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1145 | }, { |
| 1146 | .reg = PMBUS_VIRT_VMON_UV_FAULT_LIMIT, |
| 1147 | .attr = "lcrit", |
| 1148 | .alarm = "lcrit_alarm", |
| 1149 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1150 | }, { |
| 1151 | .reg = PMBUS_VIRT_VMON_OV_WARN_LIMIT, |
| 1152 | .attr = "max", |
| 1153 | .alarm = "max_alarm", |
| 1154 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1155 | }, { |
| 1156 | .reg = PMBUS_VIRT_VMON_OV_FAULT_LIMIT, |
| 1157 | .attr = "crit", |
| 1158 | .alarm = "crit_alarm", |
| 1159 | .sbit = PB_VOLTAGE_OV_FAULT, |
| 1160 | } |
| 1161 | }; |
| 1162 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1163 | static const struct pmbus_limit_attr vout_limit_attrs[] = { |
| 1164 | { |
| 1165 | .reg = PMBUS_VOUT_UV_WARN_LIMIT, |
| 1166 | .attr = "min", |
| 1167 | .alarm = "min_alarm", |
| 1168 | .sbit = PB_VOLTAGE_UV_WARNING, |
| 1169 | }, { |
| 1170 | .reg = PMBUS_VOUT_UV_FAULT_LIMIT, |
| 1171 | .attr = "lcrit", |
| 1172 | .alarm = "lcrit_alarm", |
| 1173 | .sbit = PB_VOLTAGE_UV_FAULT, |
| 1174 | }, { |
| 1175 | .reg = PMBUS_VOUT_OV_WARN_LIMIT, |
| 1176 | .attr = "max", |
| 1177 | .alarm = "max_alarm", |
| 1178 | .sbit = PB_VOLTAGE_OV_WARNING, |
| 1179 | }, { |
| 1180 | .reg = PMBUS_VOUT_OV_FAULT_LIMIT, |
| 1181 | .attr = "crit", |
| 1182 | .alarm = "crit_alarm", |
| 1183 | .sbit = PB_VOLTAGE_OV_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1184 | }, { |
| 1185 | .reg = PMBUS_VIRT_READ_VOUT_AVG, |
| 1186 | .update = true, |
| 1187 | .attr = "average", |
| 1188 | }, { |
| 1189 | .reg = PMBUS_VIRT_READ_VOUT_MIN, |
| 1190 | .update = true, |
| 1191 | .attr = "lowest", |
| 1192 | }, { |
| 1193 | .reg = PMBUS_VIRT_READ_VOUT_MAX, |
| 1194 | .update = true, |
| 1195 | .attr = "highest", |
| 1196 | }, { |
| 1197 | .reg = PMBUS_VIRT_RESET_VOUT_HISTORY, |
| 1198 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1199 | } |
| 1200 | }; |
| 1201 | |
| 1202 | static const struct pmbus_sensor_attr voltage_attributes[] = { |
| 1203 | { |
| 1204 | .reg = PMBUS_READ_VIN, |
| 1205 | .class = PSC_VOLTAGE_IN, |
| 1206 | .label = "vin", |
| 1207 | .func = PMBUS_HAVE_VIN, |
| 1208 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1209 | .sbase = PB_STATUS_INPUT_BASE, |
| 1210 | .gbit = PB_STATUS_VIN_UV, |
| 1211 | .limit = vin_limit_attrs, |
| 1212 | .nlimit = ARRAY_SIZE(vin_limit_attrs), |
| 1213 | }, { |
Guenter Roeck | aebcbbf | 2013-01-16 10:31:32 -0800 | [diff] [blame] | 1214 | .reg = PMBUS_VIRT_READ_VMON, |
| 1215 | .class = PSC_VOLTAGE_IN, |
| 1216 | .label = "vmon", |
| 1217 | .func = PMBUS_HAVE_VMON, |
| 1218 | .sfunc = PMBUS_HAVE_STATUS_VMON, |
| 1219 | .sbase = PB_STATUS_VMON_BASE, |
| 1220 | .limit = vmon_limit_attrs, |
| 1221 | .nlimit = ARRAY_SIZE(vmon_limit_attrs), |
| 1222 | }, { |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1223 | .reg = PMBUS_READ_VCAP, |
| 1224 | .class = PSC_VOLTAGE_IN, |
| 1225 | .label = "vcap", |
| 1226 | .func = PMBUS_HAVE_VCAP, |
| 1227 | }, { |
| 1228 | .reg = PMBUS_READ_VOUT, |
| 1229 | .class = PSC_VOLTAGE_OUT, |
| 1230 | .label = "vout", |
| 1231 | .paged = true, |
| 1232 | .func = PMBUS_HAVE_VOUT, |
| 1233 | .sfunc = PMBUS_HAVE_STATUS_VOUT, |
| 1234 | .sbase = PB_STATUS_VOUT_BASE, |
| 1235 | .gbit = PB_STATUS_VOUT_OV, |
| 1236 | .limit = vout_limit_attrs, |
| 1237 | .nlimit = ARRAY_SIZE(vout_limit_attrs), |
| 1238 | } |
| 1239 | }; |
| 1240 | |
| 1241 | /* Current attributes */ |
| 1242 | |
| 1243 | static const struct pmbus_limit_attr iin_limit_attrs[] = { |
| 1244 | { |
| 1245 | .reg = PMBUS_IIN_OC_WARN_LIMIT, |
| 1246 | .attr = "max", |
| 1247 | .alarm = "max_alarm", |
| 1248 | .sbit = PB_IIN_OC_WARNING, |
| 1249 | }, { |
| 1250 | .reg = PMBUS_IIN_OC_FAULT_LIMIT, |
| 1251 | .attr = "crit", |
| 1252 | .alarm = "crit_alarm", |
| 1253 | .sbit = PB_IIN_OC_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1254 | }, { |
| 1255 | .reg = PMBUS_VIRT_READ_IIN_AVG, |
| 1256 | .update = true, |
| 1257 | .attr = "average", |
| 1258 | }, { |
| 1259 | .reg = PMBUS_VIRT_READ_IIN_MIN, |
| 1260 | .update = true, |
| 1261 | .attr = "lowest", |
| 1262 | }, { |
| 1263 | .reg = PMBUS_VIRT_READ_IIN_MAX, |
| 1264 | .update = true, |
| 1265 | .attr = "highest", |
| 1266 | }, { |
| 1267 | .reg = PMBUS_VIRT_RESET_IIN_HISTORY, |
| 1268 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1269 | } |
| 1270 | }; |
| 1271 | |
| 1272 | static const struct pmbus_limit_attr iout_limit_attrs[] = { |
| 1273 | { |
| 1274 | .reg = PMBUS_IOUT_OC_WARN_LIMIT, |
| 1275 | .attr = "max", |
| 1276 | .alarm = "max_alarm", |
| 1277 | .sbit = PB_IOUT_OC_WARNING, |
| 1278 | }, { |
| 1279 | .reg = PMBUS_IOUT_UC_FAULT_LIMIT, |
| 1280 | .attr = "lcrit", |
| 1281 | .alarm = "lcrit_alarm", |
| 1282 | .sbit = PB_IOUT_UC_FAULT, |
| 1283 | }, { |
| 1284 | .reg = PMBUS_IOUT_OC_FAULT_LIMIT, |
| 1285 | .attr = "crit", |
| 1286 | .alarm = "crit_alarm", |
| 1287 | .sbit = PB_IOUT_OC_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1288 | }, { |
| 1289 | .reg = PMBUS_VIRT_READ_IOUT_AVG, |
| 1290 | .update = true, |
| 1291 | .attr = "average", |
| 1292 | }, { |
| 1293 | .reg = PMBUS_VIRT_READ_IOUT_MIN, |
| 1294 | .update = true, |
| 1295 | .attr = "lowest", |
| 1296 | }, { |
| 1297 | .reg = PMBUS_VIRT_READ_IOUT_MAX, |
| 1298 | .update = true, |
| 1299 | .attr = "highest", |
| 1300 | }, { |
| 1301 | .reg = PMBUS_VIRT_RESET_IOUT_HISTORY, |
| 1302 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1303 | } |
| 1304 | }; |
| 1305 | |
| 1306 | static const struct pmbus_sensor_attr current_attributes[] = { |
| 1307 | { |
| 1308 | .reg = PMBUS_READ_IIN, |
| 1309 | .class = PSC_CURRENT_IN, |
| 1310 | .label = "iin", |
| 1311 | .func = PMBUS_HAVE_IIN, |
| 1312 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1313 | .sbase = PB_STATUS_INPUT_BASE, |
| 1314 | .limit = iin_limit_attrs, |
| 1315 | .nlimit = ARRAY_SIZE(iin_limit_attrs), |
| 1316 | }, { |
| 1317 | .reg = PMBUS_READ_IOUT, |
| 1318 | .class = PSC_CURRENT_OUT, |
| 1319 | .label = "iout", |
| 1320 | .paged = true, |
| 1321 | .func = PMBUS_HAVE_IOUT, |
| 1322 | .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| 1323 | .sbase = PB_STATUS_IOUT_BASE, |
| 1324 | .gbit = PB_STATUS_IOUT_OC, |
| 1325 | .limit = iout_limit_attrs, |
| 1326 | .nlimit = ARRAY_SIZE(iout_limit_attrs), |
| 1327 | } |
| 1328 | }; |
| 1329 | |
| 1330 | /* Power attributes */ |
| 1331 | |
| 1332 | static const struct pmbus_limit_attr pin_limit_attrs[] = { |
| 1333 | { |
| 1334 | .reg = PMBUS_PIN_OP_WARN_LIMIT, |
| 1335 | .attr = "max", |
| 1336 | .alarm = "alarm", |
| 1337 | .sbit = PB_PIN_OP_WARNING, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1338 | }, { |
| 1339 | .reg = PMBUS_VIRT_READ_PIN_AVG, |
| 1340 | .update = true, |
| 1341 | .attr = "average", |
| 1342 | }, { |
Guenter Roeck | 48065a1 | 2015-07-05 13:45:43 -0700 | [diff] [blame] | 1343 | .reg = PMBUS_VIRT_READ_PIN_MIN, |
| 1344 | .update = true, |
| 1345 | .attr = "input_lowest", |
| 1346 | }, { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1347 | .reg = PMBUS_VIRT_READ_PIN_MAX, |
| 1348 | .update = true, |
| 1349 | .attr = "input_highest", |
| 1350 | }, { |
| 1351 | .reg = PMBUS_VIRT_RESET_PIN_HISTORY, |
| 1352 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1353 | } |
| 1354 | }; |
| 1355 | |
| 1356 | static const struct pmbus_limit_attr pout_limit_attrs[] = { |
| 1357 | { |
| 1358 | .reg = PMBUS_POUT_MAX, |
| 1359 | .attr = "cap", |
| 1360 | .alarm = "cap_alarm", |
| 1361 | .sbit = PB_POWER_LIMITING, |
| 1362 | }, { |
| 1363 | .reg = PMBUS_POUT_OP_WARN_LIMIT, |
| 1364 | .attr = "max", |
| 1365 | .alarm = "max_alarm", |
| 1366 | .sbit = PB_POUT_OP_WARNING, |
| 1367 | }, { |
| 1368 | .reg = PMBUS_POUT_OP_FAULT_LIMIT, |
| 1369 | .attr = "crit", |
| 1370 | .alarm = "crit_alarm", |
| 1371 | .sbit = PB_POUT_OP_FAULT, |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1372 | }, { |
| 1373 | .reg = PMBUS_VIRT_READ_POUT_AVG, |
| 1374 | .update = true, |
| 1375 | .attr = "average", |
| 1376 | }, { |
Guenter Roeck | 48065a1 | 2015-07-05 13:45:43 -0700 | [diff] [blame] | 1377 | .reg = PMBUS_VIRT_READ_POUT_MIN, |
| 1378 | .update = true, |
| 1379 | .attr = "input_lowest", |
| 1380 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1381 | .reg = PMBUS_VIRT_READ_POUT_MAX, |
| 1382 | .update = true, |
| 1383 | .attr = "input_highest", |
| 1384 | }, { |
| 1385 | .reg = PMBUS_VIRT_RESET_POUT_HISTORY, |
| 1386 | .attr = "reset_history", |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1387 | } |
| 1388 | }; |
| 1389 | |
| 1390 | static const struct pmbus_sensor_attr power_attributes[] = { |
| 1391 | { |
| 1392 | .reg = PMBUS_READ_PIN, |
| 1393 | .class = PSC_POWER, |
| 1394 | .label = "pin", |
| 1395 | .func = PMBUS_HAVE_PIN, |
| 1396 | .sfunc = PMBUS_HAVE_STATUS_INPUT, |
| 1397 | .sbase = PB_STATUS_INPUT_BASE, |
| 1398 | .limit = pin_limit_attrs, |
| 1399 | .nlimit = ARRAY_SIZE(pin_limit_attrs), |
| 1400 | }, { |
| 1401 | .reg = PMBUS_READ_POUT, |
| 1402 | .class = PSC_POWER, |
| 1403 | .label = "pout", |
| 1404 | .paged = true, |
| 1405 | .func = PMBUS_HAVE_POUT, |
| 1406 | .sfunc = PMBUS_HAVE_STATUS_IOUT, |
| 1407 | .sbase = PB_STATUS_IOUT_BASE, |
| 1408 | .limit = pout_limit_attrs, |
| 1409 | .nlimit = ARRAY_SIZE(pout_limit_attrs), |
| 1410 | } |
| 1411 | }; |
| 1412 | |
| 1413 | /* Temperature atributes */ |
| 1414 | |
| 1415 | static const struct pmbus_limit_attr temp_limit_attrs[] = { |
| 1416 | { |
| 1417 | .reg = PMBUS_UT_WARN_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1418 | .low = true, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1419 | .attr = "min", |
| 1420 | .alarm = "min_alarm", |
| 1421 | .sbit = PB_TEMP_UT_WARNING, |
| 1422 | }, { |
| 1423 | .reg = PMBUS_UT_FAULT_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1424 | .low = true, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1425 | .attr = "lcrit", |
| 1426 | .alarm = "lcrit_alarm", |
| 1427 | .sbit = PB_TEMP_UT_FAULT, |
| 1428 | }, { |
| 1429 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1430 | .attr = "max", |
| 1431 | .alarm = "max_alarm", |
| 1432 | .sbit = PB_TEMP_OT_WARNING, |
| 1433 | }, { |
| 1434 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1435 | .attr = "crit", |
| 1436 | .alarm = "crit_alarm", |
| 1437 | .sbit = PB_TEMP_OT_FAULT, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1438 | }, { |
| 1439 | .reg = PMBUS_VIRT_READ_TEMP_MIN, |
| 1440 | .attr = "lowest", |
| 1441 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1442 | .reg = PMBUS_VIRT_READ_TEMP_AVG, |
| 1443 | .attr = "average", |
| 1444 | }, { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1445 | .reg = PMBUS_VIRT_READ_TEMP_MAX, |
| 1446 | .attr = "highest", |
| 1447 | }, { |
| 1448 | .reg = PMBUS_VIRT_RESET_TEMP_HISTORY, |
| 1449 | .attr = "reset_history", |
| 1450 | } |
| 1451 | }; |
| 1452 | |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1453 | static const struct pmbus_limit_attr temp_limit_attrs2[] = { |
| 1454 | { |
| 1455 | .reg = PMBUS_UT_WARN_LIMIT, |
| 1456 | .low = true, |
| 1457 | .attr = "min", |
| 1458 | .alarm = "min_alarm", |
| 1459 | .sbit = PB_TEMP_UT_WARNING, |
| 1460 | }, { |
| 1461 | .reg = PMBUS_UT_FAULT_LIMIT, |
| 1462 | .low = true, |
| 1463 | .attr = "lcrit", |
| 1464 | .alarm = "lcrit_alarm", |
| 1465 | .sbit = PB_TEMP_UT_FAULT, |
| 1466 | }, { |
| 1467 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1468 | .attr = "max", |
| 1469 | .alarm = "max_alarm", |
| 1470 | .sbit = PB_TEMP_OT_WARNING, |
| 1471 | }, { |
| 1472 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1473 | .attr = "crit", |
| 1474 | .alarm = "crit_alarm", |
| 1475 | .sbit = PB_TEMP_OT_FAULT, |
| 1476 | }, { |
| 1477 | .reg = PMBUS_VIRT_READ_TEMP2_MIN, |
| 1478 | .attr = "lowest", |
| 1479 | }, { |
Guenter Roeck | 60b873e | 2012-02-23 19:33:55 -0800 | [diff] [blame] | 1480 | .reg = PMBUS_VIRT_READ_TEMP2_AVG, |
| 1481 | .attr = "average", |
| 1482 | }, { |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1483 | .reg = PMBUS_VIRT_READ_TEMP2_MAX, |
| 1484 | .attr = "highest", |
| 1485 | }, { |
| 1486 | .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY, |
| 1487 | .attr = "reset_history", |
| 1488 | } |
| 1489 | }; |
| 1490 | |
| 1491 | static const struct pmbus_limit_attr temp_limit_attrs3[] = { |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1492 | { |
| 1493 | .reg = PMBUS_UT_WARN_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1494 | .low = true, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1495 | .attr = "min", |
| 1496 | .alarm = "min_alarm", |
| 1497 | .sbit = PB_TEMP_UT_WARNING, |
| 1498 | }, { |
| 1499 | .reg = PMBUS_UT_FAULT_LIMIT, |
Guenter Roeck | 40257b9 | 2011-09-10 06:02:12 -0700 | [diff] [blame] | 1500 | .low = true, |
Guenter Roeck | 6f183d3 | 2011-07-09 08:30:26 -0700 | [diff] [blame] | 1501 | .attr = "lcrit", |
| 1502 | .alarm = "lcrit_alarm", |
| 1503 | .sbit = PB_TEMP_UT_FAULT, |
| 1504 | }, { |
| 1505 | .reg = PMBUS_OT_WARN_LIMIT, |
| 1506 | .attr = "max", |
| 1507 | .alarm = "max_alarm", |
| 1508 | .sbit = PB_TEMP_OT_WARNING, |
| 1509 | }, { |
| 1510 | .reg = PMBUS_OT_FAULT_LIMIT, |
| 1511 | .attr = "crit", |
| 1512 | .alarm = "crit_alarm", |
| 1513 | .sbit = PB_TEMP_OT_FAULT, |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1514 | } |
| 1515 | }; |
| 1516 | |
| 1517 | static const struct pmbus_sensor_attr temp_attributes[] = { |
| 1518 | { |
| 1519 | .reg = PMBUS_READ_TEMPERATURE_1, |
| 1520 | .class = PSC_TEMPERATURE, |
| 1521 | .paged = true, |
| 1522 | .update = true, |
| 1523 | .compare = true, |
| 1524 | .func = PMBUS_HAVE_TEMP, |
| 1525 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1526 | .sbase = PB_STATUS_TEMP_BASE, |
| 1527 | .gbit = PB_STATUS_TEMPERATURE, |
| 1528 | .limit = temp_limit_attrs, |
| 1529 | .nlimit = ARRAY_SIZE(temp_limit_attrs), |
| 1530 | }, { |
| 1531 | .reg = PMBUS_READ_TEMPERATURE_2, |
| 1532 | .class = PSC_TEMPERATURE, |
| 1533 | .paged = true, |
| 1534 | .update = true, |
| 1535 | .compare = true, |
| 1536 | .func = PMBUS_HAVE_TEMP2, |
| 1537 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1538 | .sbase = PB_STATUS_TEMP_BASE, |
| 1539 | .gbit = PB_STATUS_TEMPERATURE, |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1540 | .limit = temp_limit_attrs2, |
| 1541 | .nlimit = ARRAY_SIZE(temp_limit_attrs2), |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1542 | }, { |
| 1543 | .reg = PMBUS_READ_TEMPERATURE_3, |
| 1544 | .class = PSC_TEMPERATURE, |
| 1545 | .paged = true, |
| 1546 | .update = true, |
| 1547 | .compare = true, |
| 1548 | .func = PMBUS_HAVE_TEMP3, |
| 1549 | .sfunc = PMBUS_HAVE_STATUS_TEMP, |
| 1550 | .sbase = PB_STATUS_TEMP_BASE, |
| 1551 | .gbit = PB_STATUS_TEMPERATURE, |
Guenter Roeck | 3d79028 | 2011-09-10 12:59:15 -0700 | [diff] [blame] | 1552 | .limit = temp_limit_attrs3, |
| 1553 | .nlimit = ARRAY_SIZE(temp_limit_attrs3), |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1554 | } |
| 1555 | }; |
| 1556 | |
| 1557 | static const int pmbus_fan_registers[] = { |
| 1558 | PMBUS_READ_FAN_SPEED_1, |
| 1559 | PMBUS_READ_FAN_SPEED_2, |
| 1560 | PMBUS_READ_FAN_SPEED_3, |
| 1561 | PMBUS_READ_FAN_SPEED_4 |
| 1562 | }; |
| 1563 | |
| 1564 | static const int pmbus_fan_config_registers[] = { |
| 1565 | PMBUS_FAN_CONFIG_12, |
| 1566 | PMBUS_FAN_CONFIG_12, |
| 1567 | PMBUS_FAN_CONFIG_34, |
| 1568 | PMBUS_FAN_CONFIG_34 |
| 1569 | }; |
| 1570 | |
| 1571 | static const int pmbus_fan_status_registers[] = { |
| 1572 | PMBUS_STATUS_FAN_12, |
| 1573 | PMBUS_STATUS_FAN_12, |
| 1574 | PMBUS_STATUS_FAN_34, |
| 1575 | PMBUS_STATUS_FAN_34 |
| 1576 | }; |
| 1577 | |
| 1578 | static const u32 pmbus_fan_flags[] = { |
| 1579 | PMBUS_HAVE_FAN12, |
| 1580 | PMBUS_HAVE_FAN12, |
| 1581 | PMBUS_HAVE_FAN34, |
| 1582 | PMBUS_HAVE_FAN34 |
| 1583 | }; |
| 1584 | |
| 1585 | static const u32 pmbus_fan_status_flags[] = { |
| 1586 | PMBUS_HAVE_STATUS_FAN12, |
| 1587 | PMBUS_HAVE_STATUS_FAN12, |
| 1588 | PMBUS_HAVE_STATUS_FAN34, |
| 1589 | PMBUS_HAVE_STATUS_FAN34 |
| 1590 | }; |
| 1591 | |
| 1592 | /* Fans */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1593 | static int pmbus_add_fan_attributes(struct i2c_client *client, |
| 1594 | struct pmbus_data *data) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1595 | { |
| 1596 | const struct pmbus_driver_info *info = data->info; |
| 1597 | int index = 1; |
| 1598 | int page; |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1599 | int ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1600 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1601 | for (page = 0; page < info->pages; page++) { |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1602 | int f; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1603 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1604 | for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1605 | int regval; |
| 1606 | |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1607 | if (!(info->func[page] & pmbus_fan_flags[f])) |
| 1608 | break; |
| 1609 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1610 | if (!pmbus_check_word_register(client, page, |
Guenter Roeck | 6586b14 | 2011-03-09 07:23:54 -0800 | [diff] [blame] | 1611 | pmbus_fan_registers[f])) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1612 | break; |
| 1613 | |
| 1614 | /* |
| 1615 | * Skip fan if not installed. |
| 1616 | * Each fan configuration register covers multiple fans, |
| 1617 | * so we have to do some magic. |
| 1618 | */ |
Guenter Roeck | 6586b14 | 2011-03-09 07:23:54 -0800 | [diff] [blame] | 1619 | regval = _pmbus_read_byte_data(client, page, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1620 | pmbus_fan_config_registers[f]); |
| 1621 | if (regval < 0 || |
| 1622 | (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) |
| 1623 | continue; |
| 1624 | |
Guenter Roeck | e1e081a | 2013-01-20 12:01:41 -0800 | [diff] [blame] | 1625 | if (pmbus_add_sensor(data, "fan", "input", index, |
| 1626 | page, pmbus_fan_registers[f], |
| 1627 | PSC_FAN, true, true) == NULL) |
| 1628 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1629 | |
| 1630 | /* |
| 1631 | * Each fan status register covers multiple fans, |
| 1632 | * so we have to do some magic. |
| 1633 | */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1634 | if ((info->func[page] & pmbus_fan_status_flags[f]) && |
| 1635 | pmbus_check_byte_register(client, |
| 1636 | page, pmbus_fan_status_registers[f])) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1637 | int base; |
| 1638 | |
| 1639 | if (f > 1) /* fan 3, 4 */ |
Guenter Roeck | 954df67 | 2011-03-05 07:55:10 -0800 | [diff] [blame] | 1640 | base = PB_STATUS_FAN34_BASE + page; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1641 | else |
| 1642 | base = PB_STATUS_FAN_BASE + page; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1643 | ret = pmbus_add_boolean(data, "fan", |
| 1644 | "alarm", index, NULL, NULL, base, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1645 | PB_FAN_FAN1_WARNING >> (f & 1)); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1646 | if (ret) |
| 1647 | return ret; |
Guenter Roeck | 663834f | 2013-01-20 10:05:55 -0800 | [diff] [blame] | 1648 | ret = pmbus_add_boolean(data, "fan", |
| 1649 | "fault", index, NULL, NULL, base, |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1650 | PB_FAN_FAN1_FAULT >> (f & 1)); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1651 | if (ret) |
| 1652 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1653 | } |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1654 | index++; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1655 | } |
| 1656 | } |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1657 | return 0; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1658 | } |
| 1659 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1660 | static int pmbus_find_attributes(struct i2c_client *client, |
| 1661 | struct pmbus_data *data) |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1662 | { |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1663 | int ret; |
| 1664 | |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1665 | /* Voltage sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1666 | ret = pmbus_add_sensor_attrs(client, data, "in", voltage_attributes, |
| 1667 | ARRAY_SIZE(voltage_attributes)); |
| 1668 | if (ret) |
| 1669 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1670 | |
| 1671 | /* Current sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1672 | ret = pmbus_add_sensor_attrs(client, data, "curr", current_attributes, |
| 1673 | ARRAY_SIZE(current_attributes)); |
| 1674 | if (ret) |
| 1675 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1676 | |
| 1677 | /* Power sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1678 | ret = pmbus_add_sensor_attrs(client, data, "power", power_attributes, |
| 1679 | ARRAY_SIZE(power_attributes)); |
| 1680 | if (ret) |
| 1681 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1682 | |
| 1683 | /* Temperature sensors */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1684 | ret = pmbus_add_sensor_attrs(client, data, "temp", temp_attributes, |
| 1685 | ARRAY_SIZE(temp_attributes)); |
| 1686 | if (ret) |
| 1687 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1688 | |
| 1689 | /* Fans */ |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1690 | ret = pmbus_add_fan_attributes(client, data); |
| 1691 | return ret; |
Guenter Roeck | b4ce237 | 2011-03-11 18:09:33 -0800 | [diff] [blame] | 1692 | } |
| 1693 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1694 | /* |
| 1695 | * Identify chip parameters. |
| 1696 | * This function is called for all chips. |
| 1697 | */ |
| 1698 | static int pmbus_identify_common(struct i2c_client *client, |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1699 | struct pmbus_data *data, int page) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1700 | { |
Guenter Roeck | 1af1f53 | 2011-09-28 11:36:20 -0700 | [diff] [blame] | 1701 | int vout_mode = -1; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1702 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1703 | if (pmbus_check_byte_register(client, page, PMBUS_VOUT_MODE)) |
| 1704 | vout_mode = _pmbus_read_byte_data(client, page, |
| 1705 | PMBUS_VOUT_MODE); |
Guenter Roeck | 83274c6 | 2011-03-01 13:49:18 -0800 | [diff] [blame] | 1706 | if (vout_mode >= 0 && vout_mode != 0xff) { |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1707 | /* |
| 1708 | * Not all chips support the VOUT_MODE command, |
| 1709 | * so a failure to read it is not an error. |
| 1710 | */ |
| 1711 | switch (vout_mode >> 5) { |
| 1712 | case 0: /* linear mode */ |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1713 | if (data->info->format[PSC_VOLTAGE_OUT] != linear) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1714 | return -ENODEV; |
| 1715 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1716 | data->exponent[page] = ((s8)(vout_mode << 3)) >> 3; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1717 | break; |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1718 | case 1: /* VID mode */ |
| 1719 | if (data->info->format[PSC_VOLTAGE_OUT] != vid) |
| 1720 | return -ENODEV; |
| 1721 | break; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1722 | case 2: /* direct mode */ |
Guenter Roeck | 1061d85 | 2011-06-25 11:21:49 -0700 | [diff] [blame] | 1723 | if (data->info->format[PSC_VOLTAGE_OUT] != direct) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1724 | return -ENODEV; |
| 1725 | break; |
| 1726 | default: |
| 1727 | return -ENODEV; |
| 1728 | } |
| 1729 | } |
| 1730 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1731 | pmbus_clear_fault_page(client, page); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1732 | return 0; |
| 1733 | } |
| 1734 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1735 | static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, |
| 1736 | struct pmbus_driver_info *info) |
| 1737 | { |
| 1738 | struct device *dev = &client->dev; |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1739 | int page, ret; |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1740 | |
| 1741 | /* |
| 1742 | * Some PMBus chips don't support PMBUS_STATUS_BYTE, so try |
| 1743 | * to use PMBUS_STATUS_WORD instead if that is the case. |
| 1744 | * Bail out if both registers are not supported. |
| 1745 | */ |
| 1746 | data->status_register = PMBUS_STATUS_BYTE; |
| 1747 | ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE); |
| 1748 | if (ret < 0 || ret == 0xff) { |
| 1749 | data->status_register = PMBUS_STATUS_WORD; |
| 1750 | ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD); |
| 1751 | if (ret < 0 || ret == 0xffff) { |
| 1752 | dev_err(dev, "PMBus status register not found\n"); |
| 1753 | return -ENODEV; |
| 1754 | } |
| 1755 | } |
| 1756 | |
Guenter Roeck | d830e27 | 2015-08-17 16:26:21 -0700 | [diff] [blame] | 1757 | /* Enable PEC if the controller supports it */ |
| 1758 | ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); |
| 1759 | if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) |
| 1760 | client->flags |= I2C_CLIENT_PEC; |
| 1761 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1762 | pmbus_clear_faults(client); |
| 1763 | |
| 1764 | if (info->identify) { |
| 1765 | ret = (*info->identify)(client, info); |
| 1766 | if (ret < 0) { |
| 1767 | dev_err(dev, "Chip identification failed\n"); |
| 1768 | return ret; |
| 1769 | } |
| 1770 | } |
| 1771 | |
| 1772 | if (info->pages <= 0 || info->pages > PMBUS_PAGES) { |
| 1773 | dev_err(dev, "Bad number of PMBus pages: %d\n", info->pages); |
| 1774 | return -ENODEV; |
| 1775 | } |
| 1776 | |
Guenter Roeck | daa436e | 2014-01-30 19:51:14 -0800 | [diff] [blame] | 1777 | for (page = 0; page < info->pages; page++) { |
| 1778 | ret = pmbus_identify_common(client, data, page); |
| 1779 | if (ret < 0) { |
| 1780 | dev_err(dev, "Failed to identify chip capabilities\n"); |
| 1781 | return ret; |
| 1782 | } |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1783 | } |
| 1784 | return 0; |
| 1785 | } |
| 1786 | |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1787 | #if IS_ENABLED(CONFIG_REGULATOR) |
| 1788 | static int pmbus_regulator_is_enabled(struct regulator_dev *rdev) |
| 1789 | { |
| 1790 | struct device *dev = rdev_get_dev(rdev); |
| 1791 | struct i2c_client *client = to_i2c_client(dev->parent); |
| 1792 | u8 page = rdev_get_id(rdev); |
| 1793 | int ret; |
| 1794 | |
| 1795 | ret = pmbus_read_byte_data(client, page, PMBUS_OPERATION); |
| 1796 | if (ret < 0) |
| 1797 | return ret; |
| 1798 | |
| 1799 | return !!(ret & PB_OPERATION_CONTROL_ON); |
| 1800 | } |
| 1801 | |
| 1802 | static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable) |
| 1803 | { |
| 1804 | struct device *dev = rdev_get_dev(rdev); |
| 1805 | struct i2c_client *client = to_i2c_client(dev->parent); |
| 1806 | u8 page = rdev_get_id(rdev); |
| 1807 | |
| 1808 | return pmbus_update_byte_data(client, page, PMBUS_OPERATION, |
| 1809 | PB_OPERATION_CONTROL_ON, |
| 1810 | enable ? PB_OPERATION_CONTROL_ON : 0); |
| 1811 | } |
| 1812 | |
| 1813 | static int pmbus_regulator_enable(struct regulator_dev *rdev) |
| 1814 | { |
| 1815 | return _pmbus_regulator_on_off(rdev, 1); |
| 1816 | } |
| 1817 | |
| 1818 | static int pmbus_regulator_disable(struct regulator_dev *rdev) |
| 1819 | { |
| 1820 | return _pmbus_regulator_on_off(rdev, 0); |
| 1821 | } |
| 1822 | |
Axel Lin | a07d731 | 2015-07-10 13:00:08 +0800 | [diff] [blame] | 1823 | const struct regulator_ops pmbus_regulator_ops = { |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1824 | .enable = pmbus_regulator_enable, |
| 1825 | .disable = pmbus_regulator_disable, |
| 1826 | .is_enabled = pmbus_regulator_is_enabled, |
| 1827 | }; |
| 1828 | EXPORT_SYMBOL_GPL(pmbus_regulator_ops); |
| 1829 | |
| 1830 | static int pmbus_regulator_register(struct pmbus_data *data) |
| 1831 | { |
| 1832 | struct device *dev = data->dev; |
| 1833 | const struct pmbus_driver_info *info = data->info; |
| 1834 | const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
| 1835 | struct regulator_dev *rdev; |
| 1836 | int i; |
| 1837 | |
| 1838 | for (i = 0; i < info->num_regulators; i++) { |
| 1839 | struct regulator_config config = { }; |
| 1840 | |
| 1841 | config.dev = dev; |
| 1842 | config.driver_data = data; |
| 1843 | |
| 1844 | if (pdata && pdata->reg_init_data) |
| 1845 | config.init_data = &pdata->reg_init_data[i]; |
| 1846 | |
| 1847 | rdev = devm_regulator_register(dev, &info->reg_desc[i], |
| 1848 | &config); |
| 1849 | if (IS_ERR(rdev)) { |
| 1850 | dev_err(dev, "Failed to register %s regulator\n", |
| 1851 | info->reg_desc[i].name); |
| 1852 | return PTR_ERR(rdev); |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | return 0; |
| 1857 | } |
| 1858 | #else |
| 1859 | static int pmbus_regulator_register(struct pmbus_data *data) |
| 1860 | { |
| 1861 | return 0; |
| 1862 | } |
| 1863 | #endif |
| 1864 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1865 | int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, |
| 1866 | struct pmbus_driver_info *info) |
| 1867 | { |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1868 | struct device *dev = &client->dev; |
Jingoo Han | a8b3a3a | 2013-07-30 17:13:06 +0900 | [diff] [blame] | 1869 | const struct pmbus_platform_data *pdata = dev_get_platdata(dev); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1870 | struct pmbus_data *data; |
| 1871 | int ret; |
| 1872 | |
Guenter Roeck | 77493ef | 2013-01-16 10:20:15 -0800 | [diff] [blame] | 1873 | if (!info) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1874 | return -ENODEV; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1875 | |
| 1876 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE |
| 1877 | | I2C_FUNC_SMBUS_BYTE_DATA |
| 1878 | | I2C_FUNC_SMBUS_WORD_DATA)) |
| 1879 | return -ENODEV; |
| 1880 | |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1881 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
Guenter Roeck | 77493ef | 2013-01-16 10:20:15 -0800 | [diff] [blame] | 1882 | if (!data) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1883 | return -ENOMEM; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1884 | |
| 1885 | i2c_set_clientdata(client, data); |
| 1886 | mutex_init(&data->update_lock); |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1887 | data->dev = dev; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1888 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1889 | if (pdata) |
| 1890 | data->flags = pdata->flags; |
| 1891 | data->info = info; |
| 1892 | |
Guenter Roeck | 16c6d01 | 2012-05-19 11:35:25 -0700 | [diff] [blame] | 1893 | ret = pmbus_init_common(client, data, info); |
| 1894 | if (ret < 0) |
Guenter Roeck | 8b313ca | 2012-02-22 08:56:43 -0800 | [diff] [blame] | 1895 | return ret; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1896 | |
Guenter Roeck | 0328461e | 2013-01-20 08:13:21 -0800 | [diff] [blame] | 1897 | ret = pmbus_find_attributes(client, data); |
| 1898 | if (ret) |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1899 | goto out_kfree; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1900 | |
| 1901 | /* |
| 1902 | * If there are no attributes, something is wrong. |
| 1903 | * Bail out instead of trying to register nothing. |
| 1904 | */ |
| 1905 | if (!data->num_attributes) { |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1906 | dev_err(dev, "No attributes found\n"); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1907 | ret = -ENODEV; |
| 1908 | goto out_kfree; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1909 | } |
| 1910 | |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 1911 | data->groups[0] = &data->group; |
| 1912 | data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name, |
| 1913 | data, data->groups); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1914 | if (IS_ERR(data->hwmon_dev)) { |
| 1915 | ret = PTR_ERR(data->hwmon_dev); |
Guenter Roeck | c2a5835 | 2013-01-20 08:23:16 -0800 | [diff] [blame] | 1916 | dev_err(dev, "Failed to register hwmon device\n"); |
Guenter Roeck | c3b7cdd | 2013-07-06 09:47:08 -0700 | [diff] [blame] | 1917 | goto out_kfree; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1918 | } |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1919 | |
| 1920 | ret = pmbus_regulator_register(data); |
| 1921 | if (ret) |
| 1922 | goto out_unregister; |
| 1923 | |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1924 | return 0; |
| 1925 | |
Alan Tull | ddbb4db | 2014-10-15 13:55:09 -0500 | [diff] [blame] | 1926 | out_unregister: |
| 1927 | hwmon_device_unregister(data->hwmon_dev); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1928 | out_kfree: |
| 1929 | kfree(data->group.attrs); |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1930 | return ret; |
| 1931 | } |
| 1932 | EXPORT_SYMBOL_GPL(pmbus_do_probe); |
| 1933 | |
Guenter Roeck | dd285ad | 2012-02-22 08:56:44 -0800 | [diff] [blame] | 1934 | int pmbus_do_remove(struct i2c_client *client) |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1935 | { |
| 1936 | struct pmbus_data *data = i2c_get_clientdata(client); |
| 1937 | hwmon_device_unregister(data->hwmon_dev); |
Guenter Roeck | 85cfb3a | 2013-01-20 21:00:01 -0800 | [diff] [blame] | 1938 | kfree(data->group.attrs); |
Guenter Roeck | dd285ad | 2012-02-22 08:56:44 -0800 | [diff] [blame] | 1939 | return 0; |
Guenter Roeck | 442aba7 | 2011-01-26 20:09:02 -0800 | [diff] [blame] | 1940 | } |
| 1941 | EXPORT_SYMBOL_GPL(pmbus_do_remove); |
| 1942 | |
| 1943 | MODULE_AUTHOR("Guenter Roeck"); |
| 1944 | MODULE_DESCRIPTION("PMBus core driver"); |
| 1945 | MODULE_LICENSE("GPL"); |