include/linux/hwmon.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3     hwmon.h - part of lm_sensors, Linux kernel modules for hardware monitoring
   4
   5     This file declares helper functions for the sysfs class "hwmon",
   6     for use by sensors drivers.
   7
   8     Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com>
   9
  10 */
  11
  12 #ifndef _HWMON_H_
  13 #define _HWMON_H_
  14
  15 #include <linux/bitops.h>
  16
  17 struct device;
  18 struct attribute_group;
  19
  20 enum hwmon_sensor_types {
  21         hwmon_chip,
  22         hwmon_temp,
  23         hwmon_in,
  24         hwmon_curr,
  25         hwmon_power,
  26         hwmon_energy,
  27         hwmon_humidity,
  28         hwmon_fan,
  29         hwmon_pwm,
  30         hwmon_intrusion,
  31         hwmon_max,
  32 };
  33
  34 enum hwmon_chip_attributes {
  35         hwmon_chip_temp_reset_history,
  36         hwmon_chip_in_reset_history,
  37         hwmon_chip_curr_reset_history,
  38         hwmon_chip_power_reset_history,
  39         hwmon_chip_register_tz,
  40         hwmon_chip_update_interval,
  41         hwmon_chip_alarms,
  42         hwmon_chip_samples,
  43         hwmon_chip_curr_samples,
  44         hwmon_chip_in_samples,
  45         hwmon_chip_power_samples,
  46         hwmon_chip_temp_samples,
  47 };
  48
  49 #define HWMON_C_TEMP_RESET_HISTORY      BIT(hwmon_chip_temp_reset_history)
  50 #define HWMON_C_IN_RESET_HISTORY        BIT(hwmon_chip_in_reset_history)
  51 #define HWMON_C_CURR_RESET_HISTORY      BIT(hwmon_chip_curr_reset_history)
  52 #define HWMON_C_POWER_RESET_HISTORY     BIT(hwmon_chip_power_reset_history)
  53 #define HWMON_C_REGISTER_TZ             BIT(hwmon_chip_register_tz)
  54 #define HWMON_C_UPDATE_INTERVAL         BIT(hwmon_chip_update_interval)
  55 #define HWMON_C_ALARMS                  BIT(hwmon_chip_alarms)
  56 #define HWMON_C_SAMPLES                 BIT(hwmon_chip_samples)
  57 #define HWMON_C_CURR_SAMPLES            BIT(hwmon_chip_curr_samples)
  58 #define HWMON_C_IN_SAMPLES              BIT(hwmon_chip_in_samples)
  59 #define HWMON_C_POWER_SAMPLES           BIT(hwmon_chip_power_samples)
  60 #define HWMON_C_TEMP_SAMPLES            BIT(hwmon_chip_temp_samples)
  61
  62 enum hwmon_temp_attributes {
  63         hwmon_temp_enable,
  64         hwmon_temp_input,
  65         hwmon_temp_type,
  66         hwmon_temp_lcrit,
  67         hwmon_temp_lcrit_hyst,
  68         hwmon_temp_min,
  69         hwmon_temp_min_hyst,
  70         hwmon_temp_max,
  71         hwmon_temp_max_hyst,
  72         hwmon_temp_crit,
  73         hwmon_temp_crit_hyst,
  74         hwmon_temp_emergency,
  75         hwmon_temp_emergency_hyst,
  76         hwmon_temp_alarm,
  77         hwmon_temp_lcrit_alarm,
  78         hwmon_temp_min_alarm,
  79         hwmon_temp_max_alarm,
  80         hwmon_temp_crit_alarm,
  81         hwmon_temp_emergency_alarm,
  82         hwmon_temp_fault,
  83         hwmon_temp_offset,
  84         hwmon_temp_label,
  85         hwmon_temp_lowest,
  86         hwmon_temp_highest,
  87         hwmon_temp_reset_history,
  88         hwmon_temp_rated_min,
  89         hwmon_temp_rated_max,
  90 };
  91
  92 #define HWMON_T_ENABLE          BIT(hwmon_temp_enable)
  93 #define HWMON_T_INPUT           BIT(hwmon_temp_input)
  94 #define HWMON_T_TYPE            BIT(hwmon_temp_type)
  95 #define HWMON_T_LCRIT           BIT(hwmon_temp_lcrit)
  96 #define HWMON_T_LCRIT_HYST      BIT(hwmon_temp_lcrit_hyst)
  97 #define HWMON_T_MIN             BIT(hwmon_temp_min)
  98 #define HWMON_T_MIN_HYST        BIT(hwmon_temp_min_hyst)
  99 #define HWMON_T_MAX             BIT(hwmon_temp_max)
 100 #define HWMON_T_MAX_HYST        BIT(hwmon_temp_max_hyst)
 101 #define HWMON_T_CRIT            BIT(hwmon_temp_crit)
 102 #define HWMON_T_CRIT_HYST       BIT(hwmon_temp_crit_hyst)
 103 #define HWMON_T_EMERGENCY       BIT(hwmon_temp_emergency)
 104 #define HWMON_T_EMERGENCY_HYST  BIT(hwmon_temp_emergency_hyst)
 105 #define HWMON_T_ALARM           BIT(hwmon_temp_alarm)
 106 #define HWMON_T_MIN_ALARM       BIT(hwmon_temp_min_alarm)
 107 #define HWMON_T_MAX_ALARM       BIT(hwmon_temp_max_alarm)
 108 #define HWMON_T_CRIT_ALARM      BIT(hwmon_temp_crit_alarm)
 109 #define HWMON_T_LCRIT_ALARM     BIT(hwmon_temp_lcrit_alarm)
 110 #define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm)
 111 #define HWMON_T_FAULT           BIT(hwmon_temp_fault)
 112 #define HWMON_T_OFFSET          BIT(hwmon_temp_offset)
 113 #define HWMON_T_LABEL           BIT(hwmon_temp_label)
 114 #define HWMON_T_LOWEST          BIT(hwmon_temp_lowest)
 115 #define HWMON_T_HIGHEST         BIT(hwmon_temp_highest)
 116 #define HWMON_T_RESET_HISTORY   BIT(hwmon_temp_reset_history)
 117 #define HWMON_T_RATED_MIN       BIT(hwmon_temp_rated_min)
 118 #define HWMON_T_RATED_MAX       BIT(hwmon_temp_rated_max)
 119
 120 enum hwmon_in_attributes {
 121         hwmon_in_enable,
 122         hwmon_in_input,
 123         hwmon_in_min,
 124         hwmon_in_max,
 125         hwmon_in_lcrit,
 126         hwmon_in_crit,
 127         hwmon_in_average,
 128         hwmon_in_lowest,
 129         hwmon_in_highest,
 130         hwmon_in_reset_history,
 131         hwmon_in_label,
 132         hwmon_in_alarm,
 133         hwmon_in_min_alarm,
 134         hwmon_in_max_alarm,
 135         hwmon_in_lcrit_alarm,
 136         hwmon_in_crit_alarm,
 137         hwmon_in_rated_min,
 138         hwmon_in_rated_max,
 139 };
 140
 141 #define HWMON_I_ENABLE          BIT(hwmon_in_enable)
 142 #define HWMON_I_INPUT           BIT(hwmon_in_input)
 143 #define HWMON_I_MIN             BIT(hwmon_in_min)
 144 #define HWMON_I_MAX             BIT(hwmon_in_max)
 145 #define HWMON_I_LCRIT           BIT(hwmon_in_lcrit)
 146 #define HWMON_I_CRIT            BIT(hwmon_in_crit)
 147 #define HWMON_I_AVERAGE         BIT(hwmon_in_average)
 148 #define HWMON_I_LOWEST          BIT(hwmon_in_lowest)
 149 #define HWMON_I_HIGHEST         BIT(hwmon_in_highest)
 150 #define HWMON_I_RESET_HISTORY   BIT(hwmon_in_reset_history)
 151 #define HWMON_I_LABEL           BIT(hwmon_in_label)
 152 #define HWMON_I_ALARM           BIT(hwmon_in_alarm)
 153 #define HWMON_I_MIN_ALARM       BIT(hwmon_in_min_alarm)
 154 #define HWMON_I_MAX_ALARM       BIT(hwmon_in_max_alarm)
 155 #define HWMON_I_LCRIT_ALARM     BIT(hwmon_in_lcrit_alarm)
 156 #define HWMON_I_CRIT_ALARM      BIT(hwmon_in_crit_alarm)
 157 #define HWMON_I_RATED_MIN       BIT(hwmon_in_rated_min)
 158 #define HWMON_I_RATED_MAX       BIT(hwmon_in_rated_max)
 159
 160 enum hwmon_curr_attributes {
 161         hwmon_curr_enable,
 162         hwmon_curr_input,
 163         hwmon_curr_min,
 164         hwmon_curr_max,
 165         hwmon_curr_lcrit,
 166         hwmon_curr_crit,
 167         hwmon_curr_average,
 168         hwmon_curr_lowest,
 169         hwmon_curr_highest,
 170         hwmon_curr_reset_history,
 171         hwmon_curr_label,
 172         hwmon_curr_alarm,
 173         hwmon_curr_min_alarm,
 174         hwmon_curr_max_alarm,
 175         hwmon_curr_lcrit_alarm,
 176         hwmon_curr_crit_alarm,
 177         hwmon_curr_rated_min,
 178         hwmon_curr_rated_max,
 179 };
 180
 181 #define HWMON_C_ENABLE          BIT(hwmon_curr_enable)
 182 #define HWMON_C_INPUT           BIT(hwmon_curr_input)
 183 #define HWMON_C_MIN             BIT(hwmon_curr_min)
 184 #define HWMON_C_MAX             BIT(hwmon_curr_max)
 185 #define HWMON_C_LCRIT           BIT(hwmon_curr_lcrit)
 186 #define HWMON_C_CRIT            BIT(hwmon_curr_crit)
 187 #define HWMON_C_AVERAGE         BIT(hwmon_curr_average)
 188 #define HWMON_C_LOWEST          BIT(hwmon_curr_lowest)
 189 #define HWMON_C_HIGHEST         BIT(hwmon_curr_highest)
 190 #define HWMON_C_RESET_HISTORY   BIT(hwmon_curr_reset_history)
 191 #define HWMON_C_LABEL           BIT(hwmon_curr_label)
 192 #define HWMON_C_ALARM           BIT(hwmon_curr_alarm)
 193 #define HWMON_C_MIN_ALARM       BIT(hwmon_curr_min_alarm)
 194 #define HWMON_C_MAX_ALARM       BIT(hwmon_curr_max_alarm)
 195 #define HWMON_C_LCRIT_ALARM     BIT(hwmon_curr_lcrit_alarm)
 196 #define HWMON_C_CRIT_ALARM      BIT(hwmon_curr_crit_alarm)
 197 #define HWMON_C_RATED_MIN       BIT(hwmon_curr_rated_min)
 198 #define HWMON_C_RATED_MAX       BIT(hwmon_curr_rated_max)
 199
 200 enum hwmon_power_attributes {
 201         hwmon_power_enable,
 202         hwmon_power_average,
 203         hwmon_power_average_interval,
 204         hwmon_power_average_interval_max,
 205         hwmon_power_average_interval_min,
 206         hwmon_power_average_highest,
 207         hwmon_power_average_lowest,
 208         hwmon_power_average_max,
 209         hwmon_power_average_min,
 210         hwmon_power_input,
 211         hwmon_power_input_highest,
 212         hwmon_power_input_lowest,
 213         hwmon_power_reset_history,
 214         hwmon_power_accuracy,
 215         hwmon_power_cap,
 216         hwmon_power_cap_hyst,
 217         hwmon_power_cap_max,
 218         hwmon_power_cap_min,
 219         hwmon_power_min,
 220         hwmon_power_max,
 221         hwmon_power_crit,
 222         hwmon_power_lcrit,
 223         hwmon_power_label,
 224         hwmon_power_alarm,
 225         hwmon_power_cap_alarm,
 226         hwmon_power_min_alarm,
 227         hwmon_power_max_alarm,
 228         hwmon_power_lcrit_alarm,
 229         hwmon_power_crit_alarm,
 230         hwmon_power_rated_min,
 231         hwmon_power_rated_max,
 232 };
 233
 234 #define HWMON_P_ENABLE                  BIT(hwmon_power_enable)
 235 #define HWMON_P_AVERAGE                 BIT(hwmon_power_average)
 236 #define HWMON_P_AVERAGE_INTERVAL        BIT(hwmon_power_average_interval)
 237 #define HWMON_P_AVERAGE_INTERVAL_MAX    BIT(hwmon_power_average_interval_max)
 238 #define HWMON_P_AVERAGE_INTERVAL_MIN    BIT(hwmon_power_average_interval_min)
 239 #define HWMON_P_AVERAGE_HIGHEST         BIT(hwmon_power_average_highest)
 240 #define HWMON_P_AVERAGE_LOWEST          BIT(hwmon_power_average_lowest)
 241 #define HWMON_P_AVERAGE_MAX             BIT(hwmon_power_average_max)
 242 #define HWMON_P_AVERAGE_MIN             BIT(hwmon_power_average_min)
 243 #define HWMON_P_INPUT                   BIT(hwmon_power_input)
 244 #define HWMON_P_INPUT_HIGHEST           BIT(hwmon_power_input_highest)
 245 #define HWMON_P_INPUT_LOWEST            BIT(hwmon_power_input_lowest)
 246 #define HWMON_P_RESET_HISTORY           BIT(hwmon_power_reset_history)
 247 #define HWMON_P_ACCURACY                BIT(hwmon_power_accuracy)
 248 #define HWMON_P_CAP                     BIT(hwmon_power_cap)
 249 #define HWMON_P_CAP_HYST                BIT(hwmon_power_cap_hyst)
 250 #define HWMON_P_CAP_MAX                 BIT(hwmon_power_cap_max)
 251 #define HWMON_P_CAP_MIN                 BIT(hwmon_power_cap_min)
 252 #define HWMON_P_MIN                     BIT(hwmon_power_min)
 253 #define HWMON_P_MAX                     BIT(hwmon_power_max)
 254 #define HWMON_P_LCRIT                   BIT(hwmon_power_lcrit)
 255 #define HWMON_P_CRIT                    BIT(hwmon_power_crit)
 256 #define HWMON_P_LABEL                   BIT(hwmon_power_label)
 257 #define HWMON_P_ALARM                   BIT(hwmon_power_alarm)
 258 #define HWMON_P_CAP_ALARM               BIT(hwmon_power_cap_alarm)
 259 #define HWMON_P_MIN_ALARM               BIT(hwmon_power_min_alarm)
 260 #define HWMON_P_MAX_ALARM               BIT(hwmon_power_max_alarm)
 261 #define HWMON_P_LCRIT_ALARM             BIT(hwmon_power_lcrit_alarm)
 262 #define HWMON_P_CRIT_ALARM              BIT(hwmon_power_crit_alarm)
 263 #define HWMON_P_RATED_MIN               BIT(hwmon_power_rated_min)
 264 #define HWMON_P_RATED_MAX               BIT(hwmon_power_rated_max)
 265
 266 enum hwmon_energy_attributes {
 267         hwmon_energy_enable,
 268         hwmon_energy_input,
 269         hwmon_energy_label,
 270 };
 271
 272 #define HWMON_E_ENABLE                  BIT(hwmon_energy_enable)
 273 #define HWMON_E_INPUT                   BIT(hwmon_energy_input)
 274 #define HWMON_E_LABEL                   BIT(hwmon_energy_label)
 275
 276 enum hwmon_humidity_attributes {
 277         hwmon_humidity_enable,
 278         hwmon_humidity_input,
 279         hwmon_humidity_label,
 280         hwmon_humidity_min,
 281         hwmon_humidity_min_hyst,
 282         hwmon_humidity_max,
 283         hwmon_humidity_max_hyst,
 284         hwmon_humidity_alarm,
 285         hwmon_humidity_fault,
 286         hwmon_humidity_rated_min,
 287         hwmon_humidity_rated_max,
 288 };
 289
 290 #define HWMON_H_ENABLE                  BIT(hwmon_humidity_enable)
 291 #define HWMON_H_INPUT                   BIT(hwmon_humidity_input)
 292 #define HWMON_H_LABEL                   BIT(hwmon_humidity_label)
 293 #define HWMON_H_MIN                     BIT(hwmon_humidity_min)
 294 #define HWMON_H_MIN_HYST                BIT(hwmon_humidity_min_hyst)
 295 #define HWMON_H_MAX                     BIT(hwmon_humidity_max)
 296 #define HWMON_H_MAX_HYST                BIT(hwmon_humidity_max_hyst)
 297 #define HWMON_H_ALARM                   BIT(hwmon_humidity_alarm)
 298 #define HWMON_H_FAULT                   BIT(hwmon_humidity_fault)
 299 #define HWMON_H_RATED_MIN               BIT(hwmon_humidity_rated_min)
 300 #define HWMON_H_RATED_MAX               BIT(hwmon_humidity_rated_max)
 301
 302 enum hwmon_fan_attributes {
 303         hwmon_fan_enable,
 304         hwmon_fan_input,
 305         hwmon_fan_label,
 306         hwmon_fan_min,
 307         hwmon_fan_max,
 308         hwmon_fan_div,
 309         hwmon_fan_pulses,
 310         hwmon_fan_target,
 311         hwmon_fan_alarm,
 312         hwmon_fan_min_alarm,
 313         hwmon_fan_max_alarm,
 314         hwmon_fan_fault,
 315 };
 316
 317 #define HWMON_F_ENABLE                  BIT(hwmon_fan_enable)
 318 #define HWMON_F_INPUT                   BIT(hwmon_fan_input)
 319 #define HWMON_F_LABEL                   BIT(hwmon_fan_label)
 320 #define HWMON_F_MIN                     BIT(hwmon_fan_min)
 321 #define HWMON_F_MAX                     BIT(hwmon_fan_max)
 322 #define HWMON_F_DIV                     BIT(hwmon_fan_div)
 323 #define HWMON_F_PULSES                  BIT(hwmon_fan_pulses)
 324 #define HWMON_F_TARGET                  BIT(hwmon_fan_target)
 325 #define HWMON_F_ALARM                   BIT(hwmon_fan_alarm)
 326 #define HWMON_F_MIN_ALARM               BIT(hwmon_fan_min_alarm)
 327 #define HWMON_F_MAX_ALARM               BIT(hwmon_fan_max_alarm)
 328 #define HWMON_F_FAULT                   BIT(hwmon_fan_fault)
 329
 330 enum hwmon_pwm_attributes {
 331         hwmon_pwm_input,
 332         hwmon_pwm_enable,
 333         hwmon_pwm_mode,
 334         hwmon_pwm_freq,
 335 };
 336
 337 #define HWMON_PWM_INPUT                 BIT(hwmon_pwm_input)
 338 #define HWMON_PWM_ENABLE                BIT(hwmon_pwm_enable)
 339 #define HWMON_PWM_MODE                  BIT(hwmon_pwm_mode)
 340 #define HWMON_PWM_FREQ                  BIT(hwmon_pwm_freq)
 341
 342 enum hwmon_intrusion_attributes {
 343         hwmon_intrusion_alarm,
 344         hwmon_intrusion_beep,
 345 };
 346 #define HWMON_INTRUSION_ALARM           BIT(hwmon_intrusion_alarm)
 347 #define HWMON_INTRUSION_BEEP            BIT(hwmon_intrusion_beep)
 348
 349 /**
 350  * struct hwmon_ops - hwmon device operations
 351  * @is_visible: Callback to return attribute visibility. Mandatory.
 352  *              Parameters are:
 353  *              @const void *drvdata:
 354  *                      Pointer to driver-private data structure passed
 355  *                      as argument to hwmon_device_register_with_info().
 356  *              @type:  Sensor type
 357  *              @attr:  Sensor attribute
 358  *              @channel:
 359  *                      Channel number
 360  *              The function returns the file permissions.
 361  *              If the return value is 0, no attribute will be created.
 362  * @read:       Read callback for data attributes. Mandatory if readable
 363  *              data attributes are present.
 364  *              Parameters are:
 365  *              @dev:   Pointer to hardware monitoring device
 366  *              @type:  Sensor type
 367  *              @attr:  Sensor attribute
 368  *              @channel:
 369  *                      Channel number
 370  *              @val:   Pointer to returned value
 371  *              The function returns 0 on success or a negative error number.
 372  * @read_string:
 373  *              Read callback for string attributes. Mandatory if string
 374  *              attributes are present.
 375  *              Parameters are:
 376  *              @dev:   Pointer to hardware monitoring device
 377  *              @type:  Sensor type
 378  *              @attr:  Sensor attribute
 379  *              @channel:
 380  *                      Channel number
 381  *              @str:   Pointer to returned string
 382  *              The function returns 0 on success or a negative error number.
 383  * @write:      Write callback for data attributes. Mandatory if writeable
 384  *              data attributes are present.
 385  *              Parameters are:
 386  *              @dev:   Pointer to hardware monitoring device
 387  *              @type:  Sensor type
 388  *              @attr:  Sensor attribute
 389  *              @channel:
 390  *                      Channel number
 391  *              @val:   Value to write
 392  *              The function returns 0 on success or a negative error number.
 393  */
 394 struct hwmon_ops {
 395         umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
 396                               u32 attr, int channel);
 397         int (*read)(struct device *dev, enum hwmon_sensor_types type,
 398                     u32 attr, int channel, long *val);
 399         int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
 400                     u32 attr, int channel, const char **str);
 401         int (*write)(struct device *dev, enum hwmon_sensor_types type,
 402                      u32 attr, int channel, long val);
 403 };
 404
 405 /**
 406  * Channel information
 407  * @type:       Channel type.
 408  * @config:     Pointer to NULL-terminated list of channel parameters.
 409  *              Use for per-channel attributes.
 410  */
 411 struct hwmon_channel_info {
 412         enum hwmon_sensor_types type;
 413         const u32 *config;
 414 };
 415
 416 #define HWMON_CHANNEL_INFO(stype, ...)  \
 417         (&(struct hwmon_channel_info) { \
 418                 .type = hwmon_##stype,  \
 419                 .config = (u32 []) {    \
 420                         __VA_ARGS__, 0  \
 421                 }                       \
 422         })
 423
 424 /**
 425  * Chip configuration
 426  * @ops:        Pointer to hwmon operations.
 427  * @info:       Null-terminated list of channel information.
 428  */
 429 struct hwmon_chip_info {
 430         const struct hwmon_ops *ops;
 431         const struct hwmon_channel_info **info;
 432 };
 433
 434 /* hwmon_device_register() is deprecated */
 435 struct device *hwmon_device_register(struct device *dev);
 436
 437 struct device *
 438 hwmon_device_register_with_groups(struct device *dev, const char *name,
 439                                   void *drvdata,
 440                                   const struct attribute_group **groups);
 441 struct device *
 442 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
 443                                        void *drvdata,
 444                                        const struct attribute_group **groups);
 445 struct device *
 446 hwmon_device_register_with_info(struct device *dev,
 447                                 const char *name, void *drvdata,
 448                                 const struct hwmon_chip_info *info,
 449                                 const struct attribute_group **extra_groups);
 450 struct device *
 451 devm_hwmon_device_register_with_info(struct device *dev,
 452                                 const char *name, void *drvdata,
 453                                 const struct hwmon_chip_info *info,
 454                                 const struct attribute_group **extra_groups);
 455
 456 void hwmon_device_unregister(struct device *dev);
 457 void devm_hwmon_device_unregister(struct device *dev);
 458
 459 int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
 460                        u32 attr, int channel);
 461
 462 /**
 463  * hwmon_is_bad_char - Is the char invalid in a hwmon name
 464  * @ch: the char to be considered
 465  *
 466  * hwmon_is_bad_char() can be used to determine if the given character
 467  * may not be used in a hwmon name.
 468  *
 469  * Returns true if the char is invalid, false otherwise.
 470  */
 471 static inline bool hwmon_is_bad_char(const char ch)
 472 {
 473         switch (ch) {
 474         case '-':
 475         case '*':
 476         case ' ':
 477         case '\t':
 478         case '\n':
 479                 return true;
 480         default:
 481                 return false;
 482         }
 483 }
 484
 485 #endif