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 };
  89
  90 #define HWMON_T_ENABLE          BIT(hwmon_temp_enable)
  91 #define HWMON_T_INPUT           BIT(hwmon_temp_input)
  92 #define HWMON_T_TYPE            BIT(hwmon_temp_type)
  93 #define HWMON_T_LCRIT           BIT(hwmon_temp_lcrit)
  94 #define HWMON_T_LCRIT_HYST      BIT(hwmon_temp_lcrit_hyst)
  95 #define HWMON_T_MIN             BIT(hwmon_temp_min)
  96 #define HWMON_T_MIN_HYST        BIT(hwmon_temp_min_hyst)
  97 #define HWMON_T_MAX             BIT(hwmon_temp_max)
  98 #define HWMON_T_MAX_HYST        BIT(hwmon_temp_max_hyst)
  99 #define HWMON_T_CRIT            BIT(hwmon_temp_crit)
 100 #define HWMON_T_CRIT_HYST       BIT(hwmon_temp_crit_hyst)
 101 #define HWMON_T_EMERGENCY       BIT(hwmon_temp_emergency)
 102 #define HWMON_T_EMERGENCY_HYST  BIT(hwmon_temp_emergency_hyst)
 103 #define HWMON_T_ALARM           BIT(hwmon_temp_alarm)
 104 #define HWMON_T_MIN_ALARM       BIT(hwmon_temp_min_alarm)
 105 #define HWMON_T_MAX_ALARM       BIT(hwmon_temp_max_alarm)
 106 #define HWMON_T_CRIT_ALARM      BIT(hwmon_temp_crit_alarm)
 107 #define HWMON_T_LCRIT_ALARM     BIT(hwmon_temp_lcrit_alarm)
 108 #define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm)
 109 #define HWMON_T_FAULT           BIT(hwmon_temp_fault)
 110 #define HWMON_T_OFFSET          BIT(hwmon_temp_offset)
 111 #define HWMON_T_LABEL           BIT(hwmon_temp_label)
 112 #define HWMON_T_LOWEST          BIT(hwmon_temp_lowest)
 113 #define HWMON_T_HIGHEST         BIT(hwmon_temp_highest)
 114 #define HWMON_T_RESET_HISTORY   BIT(hwmon_temp_reset_history)
 115
 116 enum hwmon_in_attributes {
 117         hwmon_in_enable,
 118         hwmon_in_input,
 119         hwmon_in_min,
 120         hwmon_in_max,
 121         hwmon_in_lcrit,
 122         hwmon_in_crit,
 123         hwmon_in_average,
 124         hwmon_in_lowest,
 125         hwmon_in_highest,
 126         hwmon_in_reset_history,
 127         hwmon_in_label,
 128         hwmon_in_alarm,
 129         hwmon_in_min_alarm,
 130         hwmon_in_max_alarm,
 131         hwmon_in_lcrit_alarm,
 132         hwmon_in_crit_alarm,
 133 };
 134
 135 #define HWMON_I_ENABLE          BIT(hwmon_in_enable)
 136 #define HWMON_I_INPUT           BIT(hwmon_in_input)
 137 #define HWMON_I_MIN             BIT(hwmon_in_min)
 138 #define HWMON_I_MAX             BIT(hwmon_in_max)
 139 #define HWMON_I_LCRIT           BIT(hwmon_in_lcrit)
 140 #define HWMON_I_CRIT            BIT(hwmon_in_crit)
 141 #define HWMON_I_AVERAGE         BIT(hwmon_in_average)
 142 #define HWMON_I_LOWEST          BIT(hwmon_in_lowest)
 143 #define HWMON_I_HIGHEST         BIT(hwmon_in_highest)
 144 #define HWMON_I_RESET_HISTORY   BIT(hwmon_in_reset_history)
 145 #define HWMON_I_LABEL           BIT(hwmon_in_label)
 146 #define HWMON_I_ALARM           BIT(hwmon_in_alarm)
 147 #define HWMON_I_MIN_ALARM       BIT(hwmon_in_min_alarm)
 148 #define HWMON_I_MAX_ALARM       BIT(hwmon_in_max_alarm)
 149 #define HWMON_I_LCRIT_ALARM     BIT(hwmon_in_lcrit_alarm)
 150 #define HWMON_I_CRIT_ALARM      BIT(hwmon_in_crit_alarm)
 151
 152 enum hwmon_curr_attributes {
 153         hwmon_curr_enable,
 154         hwmon_curr_input,
 155         hwmon_curr_min,
 156         hwmon_curr_max,
 157         hwmon_curr_lcrit,
 158         hwmon_curr_crit,
 159         hwmon_curr_average,
 160         hwmon_curr_lowest,
 161         hwmon_curr_highest,
 162         hwmon_curr_reset_history,
 163         hwmon_curr_label,
 164         hwmon_curr_alarm,
 165         hwmon_curr_min_alarm,
 166         hwmon_curr_max_alarm,
 167         hwmon_curr_lcrit_alarm,
 168         hwmon_curr_crit_alarm,
 169 };
 170
 171 #define HWMON_C_ENABLE          BIT(hwmon_curr_enable)
 172 #define HWMON_C_INPUT           BIT(hwmon_curr_input)
 173 #define HWMON_C_MIN             BIT(hwmon_curr_min)
 174 #define HWMON_C_MAX             BIT(hwmon_curr_max)
 175 #define HWMON_C_LCRIT           BIT(hwmon_curr_lcrit)
 176 #define HWMON_C_CRIT            BIT(hwmon_curr_crit)
 177 #define HWMON_C_AVERAGE         BIT(hwmon_curr_average)
 178 #define HWMON_C_LOWEST          BIT(hwmon_curr_lowest)
 179 #define HWMON_C_HIGHEST         BIT(hwmon_curr_highest)
 180 #define HWMON_C_RESET_HISTORY   BIT(hwmon_curr_reset_history)
 181 #define HWMON_C_LABEL           BIT(hwmon_curr_label)
 182 #define HWMON_C_ALARM           BIT(hwmon_curr_alarm)
 183 #define HWMON_C_MIN_ALARM       BIT(hwmon_curr_min_alarm)
 184 #define HWMON_C_MAX_ALARM       BIT(hwmon_curr_max_alarm)
 185 #define HWMON_C_LCRIT_ALARM     BIT(hwmon_curr_lcrit_alarm)
 186 #define HWMON_C_CRIT_ALARM      BIT(hwmon_curr_crit_alarm)
 187
 188 enum hwmon_power_attributes {
 189         hwmon_power_enable,
 190         hwmon_power_average,
 191         hwmon_power_average_interval,
 192         hwmon_power_average_interval_max,
 193         hwmon_power_average_interval_min,
 194         hwmon_power_average_highest,
 195         hwmon_power_average_lowest,
 196         hwmon_power_average_max,
 197         hwmon_power_average_min,
 198         hwmon_power_input,
 199         hwmon_power_input_highest,
 200         hwmon_power_input_lowest,
 201         hwmon_power_reset_history,
 202         hwmon_power_accuracy,
 203         hwmon_power_cap,
 204         hwmon_power_cap_hyst,
 205         hwmon_power_cap_max,
 206         hwmon_power_cap_min,
 207         hwmon_power_min,
 208         hwmon_power_max,
 209         hwmon_power_crit,
 210         hwmon_power_lcrit,
 211         hwmon_power_label,
 212         hwmon_power_alarm,
 213         hwmon_power_cap_alarm,
 214         hwmon_power_min_alarm,
 215         hwmon_power_max_alarm,
 216         hwmon_power_lcrit_alarm,
 217         hwmon_power_crit_alarm,
 218 };
 219
 220 #define HWMON_P_ENABLE                  BIT(hwmon_power_enable)
 221 #define HWMON_P_AVERAGE                 BIT(hwmon_power_average)
 222 #define HWMON_P_AVERAGE_INTERVAL        BIT(hwmon_power_average_interval)
 223 #define HWMON_P_AVERAGE_INTERVAL_MAX    BIT(hwmon_power_average_interval_max)
 224 #define HWMON_P_AVERAGE_INTERVAL_MIN    BIT(hwmon_power_average_interval_min)
 225 #define HWMON_P_AVERAGE_HIGHEST         BIT(hwmon_power_average_highest)
 226 #define HWMON_P_AVERAGE_LOWEST          BIT(hwmon_power_average_lowest)
 227 #define HWMON_P_AVERAGE_MAX             BIT(hwmon_power_average_max)
 228 #define HWMON_P_AVERAGE_MIN             BIT(hwmon_power_average_min)
 229 #define HWMON_P_INPUT                   BIT(hwmon_power_input)
 230 #define HWMON_P_INPUT_HIGHEST           BIT(hwmon_power_input_highest)
 231 #define HWMON_P_INPUT_LOWEST            BIT(hwmon_power_input_lowest)
 232 #define HWMON_P_RESET_HISTORY           BIT(hwmon_power_reset_history)
 233 #define HWMON_P_ACCURACY                BIT(hwmon_power_accuracy)
 234 #define HWMON_P_CAP                     BIT(hwmon_power_cap)
 235 #define HWMON_P_CAP_HYST                BIT(hwmon_power_cap_hyst)
 236 #define HWMON_P_CAP_MAX                 BIT(hwmon_power_cap_max)
 237 #define HWMON_P_CAP_MIN                 BIT(hwmon_power_cap_min)
 238 #define HWMON_P_MIN                     BIT(hwmon_power_min)
 239 #define HWMON_P_MAX                     BIT(hwmon_power_max)
 240 #define HWMON_P_LCRIT                   BIT(hwmon_power_lcrit)
 241 #define HWMON_P_CRIT                    BIT(hwmon_power_crit)
 242 #define HWMON_P_LABEL                   BIT(hwmon_power_label)
 243 #define HWMON_P_ALARM                   BIT(hwmon_power_alarm)
 244 #define HWMON_P_CAP_ALARM               BIT(hwmon_power_cap_alarm)
 245 #define HWMON_P_MIN_ALARM               BIT(hwmon_power_min_alarm)
 246 #define HWMON_P_MAX_ALARM               BIT(hwmon_power_max_alarm)
 247 #define HWMON_P_LCRIT_ALARM             BIT(hwmon_power_lcrit_alarm)
 248 #define HWMON_P_CRIT_ALARM              BIT(hwmon_power_crit_alarm)
 249
 250 enum hwmon_energy_attributes {
 251         hwmon_energy_enable,
 252         hwmon_energy_input,
 253         hwmon_energy_label,
 254 };
 255
 256 #define HWMON_E_ENABLE                  BIT(hwmon_energy_enable)
 257 #define HWMON_E_INPUT                   BIT(hwmon_energy_input)
 258 #define HWMON_E_LABEL                   BIT(hwmon_energy_label)
 259
 260 enum hwmon_humidity_attributes {
 261         hwmon_humidity_enable,
 262         hwmon_humidity_input,
 263         hwmon_humidity_label,
 264         hwmon_humidity_min,
 265         hwmon_humidity_min_hyst,
 266         hwmon_humidity_max,
 267         hwmon_humidity_max_hyst,
 268         hwmon_humidity_alarm,
 269         hwmon_humidity_fault,
 270 };
 271
 272 #define HWMON_H_ENABLE                  BIT(hwmon_humidity_enable)
 273 #define HWMON_H_INPUT                   BIT(hwmon_humidity_input)
 274 #define HWMON_H_LABEL                   BIT(hwmon_humidity_label)
 275 #define HWMON_H_MIN                     BIT(hwmon_humidity_min)
 276 #define HWMON_H_MIN_HYST                BIT(hwmon_humidity_min_hyst)
 277 #define HWMON_H_MAX                     BIT(hwmon_humidity_max)
 278 #define HWMON_H_MAX_HYST                BIT(hwmon_humidity_max_hyst)
 279 #define HWMON_H_ALARM                   BIT(hwmon_humidity_alarm)
 280 #define HWMON_H_FAULT                   BIT(hwmon_humidity_fault)
 281
 282 enum hwmon_fan_attributes {
 283         hwmon_fan_enable,
 284         hwmon_fan_input,
 285         hwmon_fan_label,
 286         hwmon_fan_min,
 287         hwmon_fan_max,
 288         hwmon_fan_div,
 289         hwmon_fan_pulses,
 290         hwmon_fan_target,
 291         hwmon_fan_alarm,
 292         hwmon_fan_min_alarm,
 293         hwmon_fan_max_alarm,
 294         hwmon_fan_fault,
 295 };
 296
 297 #define HWMON_F_ENABLE                  BIT(hwmon_fan_enable)
 298 #define HWMON_F_INPUT                   BIT(hwmon_fan_input)
 299 #define HWMON_F_LABEL                   BIT(hwmon_fan_label)
 300 #define HWMON_F_MIN                     BIT(hwmon_fan_min)
 301 #define HWMON_F_MAX                     BIT(hwmon_fan_max)
 302 #define HWMON_F_DIV                     BIT(hwmon_fan_div)
 303 #define HWMON_F_PULSES                  BIT(hwmon_fan_pulses)
 304 #define HWMON_F_TARGET                  BIT(hwmon_fan_target)
 305 #define HWMON_F_ALARM                   BIT(hwmon_fan_alarm)
 306 #define HWMON_F_MIN_ALARM               BIT(hwmon_fan_min_alarm)
 307 #define HWMON_F_MAX_ALARM               BIT(hwmon_fan_max_alarm)
 308 #define HWMON_F_FAULT                   BIT(hwmon_fan_fault)
 309
 310 enum hwmon_pwm_attributes {
 311         hwmon_pwm_input,
 312         hwmon_pwm_enable,
 313         hwmon_pwm_mode,
 314         hwmon_pwm_freq,
 315 };
 316
 317 #define HWMON_PWM_INPUT                 BIT(hwmon_pwm_input)
 318 #define HWMON_PWM_ENABLE                BIT(hwmon_pwm_enable)
 319 #define HWMON_PWM_MODE                  BIT(hwmon_pwm_mode)
 320 #define HWMON_PWM_FREQ                  BIT(hwmon_pwm_freq)
 321
 322 enum hwmon_intrusion_attributes {
 323         hwmon_intrusion_alarm,
 324         hwmon_intrusion_beep,
 325 };
 326 #define HWMON_INTRUSION_ALARM           BIT(hwmon_intrusion_alarm)
 327 #define HWMON_INTRUSION_BEEP            BIT(hwmon_intrusion_beep)
 328
 329 /**
 330  * struct hwmon_ops - hwmon device operations
 331  * @is_visible: Callback to return attribute visibility. Mandatory.
 332  *              Parameters are:
 333  *              @const void *drvdata:
 334  *                      Pointer to driver-private data structure passed
 335  *                      as argument to hwmon_device_register_with_info().
 336  *              @type:  Sensor type
 337  *              @attr:  Sensor attribute
 338  *              @channel:
 339  *                      Channel number
 340  *              The function returns the file permissions.
 341  *              If the return value is 0, no attribute will be created.
 342  * @read:       Read callback for data attributes. Mandatory if readable
 343  *              data attributes are present.
 344  *              Parameters are:
 345  *              @dev:   Pointer to hardware monitoring device
 346  *              @type:  Sensor type
 347  *              @attr:  Sensor attribute
 348  *              @channel:
 349  *                      Channel number
 350  *              @val:   Pointer to returned value
 351  *              The function returns 0 on success or a negative error number.
 352  * @read_string:
 353  *              Read callback for string attributes. Mandatory if string
 354  *              attributes are present.
 355  *              Parameters are:
 356  *              @dev:   Pointer to hardware monitoring device
 357  *              @type:  Sensor type
 358  *              @attr:  Sensor attribute
 359  *              @channel:
 360  *                      Channel number
 361  *              @str:   Pointer to returned string
 362  *              The function returns 0 on success or a negative error number.
 363  * @write:      Write callback for data attributes. Mandatory if writeable
 364  *              data attributes are present.
 365  *              Parameters are:
 366  *              @dev:   Pointer to hardware monitoring device
 367  *              @type:  Sensor type
 368  *              @attr:  Sensor attribute
 369  *              @channel:
 370  *                      Channel number
 371  *              @val:   Value to write
 372  *              The function returns 0 on success or a negative error number.
 373  */
 374 struct hwmon_ops {
 375         umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
 376                               u32 attr, int channel);
 377         int (*read)(struct device *dev, enum hwmon_sensor_types type,
 378                     u32 attr, int channel, long *val);
 379         int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
 380                     u32 attr, int channel, const char **str);
 381         int (*write)(struct device *dev, enum hwmon_sensor_types type,
 382                      u32 attr, int channel, long val);
 383 };
 384
 385 /**
 386  * Channel information
 387  * @type:       Channel type.
 388  * @config:     Pointer to NULL-terminated list of channel parameters.
 389  *              Use for per-channel attributes.
 390  */
 391 struct hwmon_channel_info {
 392         enum hwmon_sensor_types type;
 393         const u32 *config;
 394 };
 395
 396 #define HWMON_CHANNEL_INFO(stype, ...)  \
 397         (&(struct hwmon_channel_info) { \
 398                 .type = hwmon_##stype,  \
 399                 .config = (u32 []) {    \
 400                         __VA_ARGS__, 0  \
 401                 }                       \
 402         })
 403
 404 /**
 405  * Chip configuration
 406  * @ops:        Pointer to hwmon operations.
 407  * @info:       Null-terminated list of channel information.
 408  */
 409 struct hwmon_chip_info {
 410         const struct hwmon_ops *ops;
 411         const struct hwmon_channel_info **info;
 412 };
 413
 414 /* hwmon_device_register() is deprecated */
 415 struct device *hwmon_device_register(struct device *dev);
 416
 417 struct device *
 418 hwmon_device_register_with_groups(struct device *dev, const char *name,
 419                                   void *drvdata,
 420                                   const struct attribute_group **groups);
 421 struct device *
 422 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
 423                                        void *drvdata,
 424                                        const struct attribute_group **groups);
 425 struct device *
 426 hwmon_device_register_with_info(struct device *dev,
 427                                 const char *name, void *drvdata,
 428                                 const struct hwmon_chip_info *info,
 429                                 const struct attribute_group **extra_groups);
 430 struct device *
 431 devm_hwmon_device_register_with_info(struct device *dev,
 432                                 const char *name, void *drvdata,
 433                                 const struct hwmon_chip_info *info,
 434                                 const struct attribute_group **extra_groups);
 435
 436 void hwmon_device_unregister(struct device *dev);
 437 void devm_hwmon_device_unregister(struct device *dev);
 438
 439 int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
 440                        u32 attr, int channel);
 441
 442 /**
 443  * hwmon_is_bad_char - Is the char invalid in a hwmon name
 444  * @ch: the char to be considered
 445  *
 446  * hwmon_is_bad_char() can be used to determine if the given character
 447  * may not be used in a hwmon name.
 448  *
 449  * Returns true if the char is invalid, false otherwise.
 450  */
 451 static inline bool hwmon_is_bad_char(const char ch)
 452 {
 453         switch (ch) {
 454         case '-':
 455         case '*':
 456         case ' ':
 457         case '\t':
 458         case '\n':
 459                 return true;
 460         default:
 461                 return false;
 462         }
 463 }
 464
 465 #endif