include/linux/hwmon.h

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