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 };
  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 };
  43
  44 #define HWMON_C_TEMP_RESET_HISTORY      BIT(hwmon_chip_temp_reset_history)
  45 #define HWMON_C_IN_RESET_HISTORY        BIT(hwmon_chip_in_reset_history)
  46 #define HWMON_C_CURR_RESET_HISTORY      BIT(hwmon_chip_curr_reset_history)
  47 #define HWMON_C_POWER_RESET_HISTORY     BIT(hwmon_chip_power_reset_history)
  48 #define HWMON_C_REGISTER_TZ             BIT(hwmon_chip_register_tz)
  49 #define HWMON_C_UPDATE_INTERVAL         BIT(hwmon_chip_update_interval)
  50 #define HWMON_C_ALARMS                  BIT(hwmon_chip_alarms)
  51
  52 enum hwmon_temp_attributes {
  53         hwmon_temp_input = 0,
  54         hwmon_temp_type,
  55         hwmon_temp_lcrit,
  56         hwmon_temp_lcrit_hyst,
  57         hwmon_temp_min,
  58         hwmon_temp_min_hyst,
  59         hwmon_temp_max,
  60         hwmon_temp_max_hyst,
  61         hwmon_temp_crit,
  62         hwmon_temp_crit_hyst,
  63         hwmon_temp_emergency,
  64         hwmon_temp_emergency_hyst,
  65         hwmon_temp_alarm,
  66         hwmon_temp_lcrit_alarm,
  67         hwmon_temp_min_alarm,
  68         hwmon_temp_max_alarm,
  69         hwmon_temp_crit_alarm,
  70         hwmon_temp_emergency_alarm,
  71         hwmon_temp_fault,
  72         hwmon_temp_offset,
  73         hwmon_temp_label,
  74         hwmon_temp_lowest,
  75         hwmon_temp_highest,
  76         hwmon_temp_reset_history,
  77 };
  78
  79 #define HWMON_T_INPUT           BIT(hwmon_temp_input)
  80 #define HWMON_T_TYPE            BIT(hwmon_temp_type)
  81 #define HWMON_T_LCRIT           BIT(hwmon_temp_lcrit)
  82 #define HWMON_T_LCRIT_HYST      BIT(hwmon_temp_lcrit_hyst)
  83 #define HWMON_T_MIN             BIT(hwmon_temp_min)
  84 #define HWMON_T_MIN_HYST        BIT(hwmon_temp_min_hyst)
  85 #define HWMON_T_MAX             BIT(hwmon_temp_max)
  86 #define HWMON_T_MAX_HYST        BIT(hwmon_temp_max_hyst)
  87 #define HWMON_T_CRIT            BIT(hwmon_temp_crit)
  88 #define HWMON_T_CRIT_HYST       BIT(hwmon_temp_crit_hyst)
  89 #define HWMON_T_EMERGENCY       BIT(hwmon_temp_emergency)
  90 #define HWMON_T_EMERGENCY_HYST  BIT(hwmon_temp_emergency_hyst)
  91 #define HWMON_T_MIN_ALARM       BIT(hwmon_temp_min_alarm)
  92 #define HWMON_T_MAX_ALARM       BIT(hwmon_temp_max_alarm)
  93 #define HWMON_T_CRIT_ALARM      BIT(hwmon_temp_crit_alarm)
  94 #define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm)
  95 #define HWMON_T_FAULT           BIT(hwmon_temp_fault)
  96 #define HWMON_T_OFFSET          BIT(hwmon_temp_offset)
  97 #define HWMON_T_LABEL           BIT(hwmon_temp_label)
  98 #define HWMON_T_LOWEST          BIT(hwmon_temp_lowest)
  99 #define HWMON_T_HIGHEST         BIT(hwmon_temp_highest)
 100 #define HWMON_T_RESET_HISTORY   BIT(hwmon_temp_reset_history)
 101
 102 enum hwmon_in_attributes {
 103         hwmon_in_input,
 104         hwmon_in_min,
 105         hwmon_in_max,
 106         hwmon_in_lcrit,
 107         hwmon_in_crit,
 108         hwmon_in_average,
 109         hwmon_in_lowest,
 110         hwmon_in_highest,
 111         hwmon_in_reset_history,
 112         hwmon_in_label,
 113         hwmon_in_alarm,
 114         hwmon_in_min_alarm,
 115         hwmon_in_max_alarm,
 116         hwmon_in_lcrit_alarm,
 117         hwmon_in_crit_alarm,
 118 };
 119
 120 #define HWMON_I_INPUT           BIT(hwmon_in_input)
 121 #define HWMON_I_MIN             BIT(hwmon_in_min)
 122 #define HWMON_I_MAX             BIT(hwmon_in_max)
 123 #define HWMON_I_LCRIT           BIT(hwmon_in_lcrit)
 124 #define HWMON_I_CRIT            BIT(hwmon_in_crit)
 125 #define HWMON_I_AVERAGE         BIT(hwmon_in_average)
 126 #define HWMON_I_LOWEST          BIT(hwmon_in_lowest)
 127 #define HWMON_I_HIGHEST         BIT(hwmon_in_highest)
 128 #define HWMON_I_RESET_HISTORY   BIT(hwmon_in_reset_history)
 129 #define HWMON_I_LABEL           BIT(hwmon_in_label)
 130 #define HWMON_I_ALARM           BIT(hwmon_in_alarm)
 131 #define HWMON_I_MIN_ALARM       BIT(hwmon_in_min_alarm)
 132 #define HWMON_I_MAX_ALARM       BIT(hwmon_in_max_alarm)
 133 #define HWMON_I_LCRIT_ALARM     BIT(hwmon_in_lcrit_alarm)
 134 #define HWMON_I_CRIT_ALARM      BIT(hwmon_in_crit_alarm)
 135
 136 enum hwmon_curr_attributes {
 137         hwmon_curr_input,
 138         hwmon_curr_min,
 139         hwmon_curr_max,
 140         hwmon_curr_lcrit,
 141         hwmon_curr_crit,
 142         hwmon_curr_average,
 143         hwmon_curr_lowest,
 144         hwmon_curr_highest,
 145         hwmon_curr_reset_history,
 146         hwmon_curr_label,
 147         hwmon_curr_alarm,
 148         hwmon_curr_min_alarm,
 149         hwmon_curr_max_alarm,
 150         hwmon_curr_lcrit_alarm,
 151         hwmon_curr_crit_alarm,
 152 };
 153
 154 #define HWMON_C_INPUT           BIT(hwmon_curr_input)
 155 #define HWMON_C_MIN             BIT(hwmon_curr_min)
 156 #define HWMON_C_MAX             BIT(hwmon_curr_max)
 157 #define HWMON_C_LCRIT           BIT(hwmon_curr_lcrit)
 158 #define HWMON_C_CRIT            BIT(hwmon_curr_crit)
 159 #define HWMON_C_AVERAGE         BIT(hwmon_curr_average)
 160 #define HWMON_C_LOWEST          BIT(hwmon_curr_lowest)
 161 #define HWMON_C_HIGHEST         BIT(hwmon_curr_highest)
 162 #define HWMON_C_RESET_HISTORY   BIT(hwmon_curr_reset_history)
 163 #define HWMON_C_LABEL           BIT(hwmon_curr_label)
 164 #define HWMON_C_ALARM           BIT(hwmon_curr_alarm)
 165 #define HWMON_C_MIN_ALARM       BIT(hwmon_curr_min_alarm)
 166 #define HWMON_C_MAX_ALARM       BIT(hwmon_curr_max_alarm)
 167 #define HWMON_C_LCRIT_ALARM     BIT(hwmon_curr_lcrit_alarm)
 168 #define HWMON_C_CRIT_ALARM      BIT(hwmon_curr_crit_alarm)
 169
 170 enum hwmon_power_attributes {
 171         hwmon_power_average,
 172         hwmon_power_average_interval,
 173         hwmon_power_average_interval_max,
 174         hwmon_power_average_interval_min,
 175         hwmon_power_average_highest,
 176         hwmon_power_average_lowest,
 177         hwmon_power_average_max,
 178         hwmon_power_average_min,
 179         hwmon_power_input,
 180         hwmon_power_input_highest,
 181         hwmon_power_input_lowest,
 182         hwmon_power_reset_history,
 183         hwmon_power_accuracy,
 184         hwmon_power_cap,
 185         hwmon_power_cap_hyst,
 186         hwmon_power_cap_max,
 187         hwmon_power_cap_min,
 188         hwmon_power_max,
 189         hwmon_power_crit,
 190         hwmon_power_label,
 191         hwmon_power_alarm,
 192         hwmon_power_cap_alarm,
 193         hwmon_power_max_alarm,
 194         hwmon_power_crit_alarm,
 195 };
 196
 197 #define HWMON_P_AVERAGE                 BIT(hwmon_power_average)
 198 #define HWMON_P_AVERAGE_INTERVAL        BIT(hwmon_power_average_interval)
 199 #define HWMON_P_AVERAGE_INTERVAL_MAX    BIT(hwmon_power_average_interval_max)
 200 #define HWMON_P_AVERAGE_INTERVAL_MIN    BIT(hwmon_power_average_interval_min)
 201 #define HWMON_P_AVERAGE_HIGHEST         BIT(hwmon_power_average_highest)
 202 #define HWMON_P_AVERAGE_LOWEST          BIT(hwmon_power_average_lowest)
 203 #define HWMON_P_AVERAGE_MAX             BIT(hwmon_power_average_max)
 204 #define HWMON_P_AVERAGE_MIN             BIT(hwmon_power_average_min)
 205 #define HWMON_P_INPUT                   BIT(hwmon_power_input)
 206 #define HWMON_P_INPUT_HIGHEST           BIT(hwmon_power_input_highest)
 207 #define HWMON_P_INPUT_LOWEST            BIT(hwmon_power_input_lowest)
 208 #define HWMON_P_RESET_HISTORY           BIT(hwmon_power_reset_history)
 209 #define HWMON_P_ACCURACY                BIT(hwmon_power_accuracy)
 210 #define HWMON_P_CAP                     BIT(hwmon_power_cap)
 211 #define HWMON_P_CAP_HYST                BIT(hwmon_power_cap_hyst)
 212 #define HWMON_P_CAP_MAX                 BIT(hwmon_power_cap_max)
 213 #define HWMON_P_CAP_MIN                 BIT(hwmon_power_cap_min)
 214 #define HWMON_P_MAX                     BIT(hwmon_power_max)
 215 #define HWMON_P_CRIT                    BIT(hwmon_power_crit)
 216 #define HWMON_P_LABEL                   BIT(hwmon_power_label)
 217 #define HWMON_P_ALARM                   BIT(hwmon_power_alarm)
 218 #define HWMON_P_CAP_ALARM               BIT(hwmon_power_cap_alarm)
 219 #define HWMON_P_MAX_ALARM               BIT(hwmon_power_max_alarm)
 220 #define HWMON_P_CRIT_ALARM              BIT(hwmon_power_crit_alarm)
 221
 222 enum hwmon_energy_attributes {
 223         hwmon_energy_input,
 224         hwmon_energy_label,
 225 };
 226
 227 #define HWMON_E_INPUT                   BIT(hwmon_energy_input)
 228 #define HWMON_E_LABEL                   BIT(hwmon_energy_label)
 229
 230 enum hwmon_humidity_attributes {
 231         hwmon_humidity_input,
 232         hwmon_humidity_label,
 233         hwmon_humidity_min,
 234         hwmon_humidity_min_hyst,
 235         hwmon_humidity_max,
 236         hwmon_humidity_max_hyst,
 237         hwmon_humidity_alarm,
 238         hwmon_humidity_fault,
 239 };
 240
 241 #define HWMON_H_INPUT                   BIT(hwmon_humidity_input)
 242 #define HWMON_H_LABEL                   BIT(hwmon_humidity_label)
 243 #define HWMON_H_MIN                     BIT(hwmon_humidity_min)
 244 #define HWMON_H_MIN_HYST                BIT(hwmon_humidity_min_hyst)
 245 #define HWMON_H_MAX                     BIT(hwmon_humidity_max)
 246 #define HWMON_H_MAX_HYST                BIT(hwmon_humidity_max_hyst)
 247 #define HWMON_H_ALARM                   BIT(hwmon_humidity_alarm)
 248 #define HWMON_H_FAULT                   BIT(hwmon_humidity_fault)
 249
 250 enum hwmon_fan_attributes {
 251         hwmon_fan_input,
 252         hwmon_fan_label,
 253         hwmon_fan_min,
 254         hwmon_fan_max,
 255         hwmon_fan_div,
 256         hwmon_fan_pulses,
 257         hwmon_fan_target,
 258         hwmon_fan_alarm,
 259         hwmon_fan_min_alarm,
 260         hwmon_fan_max_alarm,
 261         hwmon_fan_fault,
 262 };
 263
 264 #define HWMON_F_INPUT                   BIT(hwmon_fan_input)
 265 #define HWMON_F_LABEL                   BIT(hwmon_fan_label)
 266 #define HWMON_F_MIN                     BIT(hwmon_fan_min)
 267 #define HWMON_F_MAX                     BIT(hwmon_fan_max)
 268 #define HWMON_F_DIV                     BIT(hwmon_fan_div)
 269 #define HWMON_F_PULSES                  BIT(hwmon_fan_pulses)
 270 #define HWMON_F_TARGET                  BIT(hwmon_fan_target)
 271 #define HWMON_F_ALARM                   BIT(hwmon_fan_alarm)
 272 #define HWMON_F_MIN_ALARM               BIT(hwmon_fan_min_alarm)
 273 #define HWMON_F_MAX_ALARM               BIT(hwmon_fan_max_alarm)
 274 #define HWMON_F_FAULT                   BIT(hwmon_fan_fault)
 275
 276 enum hwmon_pwm_attributes {
 277         hwmon_pwm_input,
 278         hwmon_pwm_enable,
 279         hwmon_pwm_mode,
 280         hwmon_pwm_freq,
 281 };
 282
 283 #define HWMON_PWM_INPUT                 BIT(hwmon_pwm_input)
 284 #define HWMON_PWM_ENABLE                BIT(hwmon_pwm_enable)
 285 #define HWMON_PWM_MODE                  BIT(hwmon_pwm_mode)
 286 #define HWMON_PWM_FREQ                  BIT(hwmon_pwm_freq)
 287
 288 /**
 289  * struct hwmon_ops - hwmon device operations
 290  * @is_visible: Callback to return attribute visibility. Mandatory.
 291  *              Parameters are:
 292  *              @const void *drvdata:
 293  *                      Pointer to driver-private data structure passed
 294  *                      as argument to hwmon_device_register_with_info().
 295  *              @type:  Sensor type
 296  *              @attr:  Sensor attribute
 297  *              @channel:
 298  *                      Channel number
 299  *              The function returns the file permissions.
 300  *              If the return value is 0, no attribute will be created.
 301  * @read:       Read callback. Optional. If not provided, attributes
 302  *              will not be readable.
 303  *              Parameters are:
 304  *              @dev:   Pointer to hardware monitoring device
 305  *              @type:  Sensor type
 306  *              @attr:  Sensor attribute
 307  *              @channel:
 308  *                      Channel number
 309  *              @val:   Pointer to returned value
 310  *              The function returns 0 on success or a negative error number.
 311  * @write:      Write callback. Optional. If not provided, attributes
 312  *              will not be writable.
 313  *              Parameters are:
 314  *              @dev:   Pointer to hardware monitoring device
 315  *              @type:  Sensor type
 316  *              @attr:  Sensor attribute
 317  *              @channel:
 318  *                      Channel number
 319  *              @val:   Value to write
 320  *              The function returns 0 on success or a negative error number.
 321  */
 322 struct hwmon_ops {
 323         umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
 324                               u32 attr, int channel);
 325         int (*read)(struct device *dev, enum hwmon_sensor_types type,
 326                     u32 attr, int channel, long *val);
 327         int (*write)(struct device *dev, enum hwmon_sensor_types type,
 328                      u32 attr, int channel, long val);
 329 };
 330
 331 /**
 332  * Channel information
 333  * @type:       Channel type.
 334  * @config:     Pointer to NULL-terminated list of channel parameters.
 335  *              Use for per-channel attributes.
 336  */
 337 struct hwmon_channel_info {
 338         enum hwmon_sensor_types type;
 339         const u32 *config;
 340 };
 341
 342 /**
 343  * Chip configuration
 344  * @ops:        Pointer to hwmon operations.
 345  * @info:       Null-terminated list of channel information.
 346  */
 347 struct hwmon_chip_info {
 348         const struct hwmon_ops *ops;
 349         const struct hwmon_channel_info **info;
 350 };
 351
 352 struct device *hwmon_device_register(struct device *dev);
 353 struct device *
 354 hwmon_device_register_with_groups(struct device *dev, const char *name,
 355                                   void *drvdata,
 356                                   const struct attribute_group **groups);
 357 struct device *
 358 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
 359                                        void *drvdata,
 360                                        const struct attribute_group **groups);
 361 struct device *
 362 hwmon_device_register_with_info(struct device *dev,
 363                                 const char *name, void *drvdata,
 364                                 const struct hwmon_chip_info *info,
 365                                 const struct attribute_group **groups);
 366 struct device *
 367 devm_hwmon_device_register_with_info(struct device *dev,
 368                                      const char *name, void *drvdata,
 369                                      const struct hwmon_chip_info *info,
 370                                      const struct attribute_group **groups);
 371
 372 void hwmon_device_unregister(struct device *dev);
 373 void devm_hwmon_device_unregister(struct device *dev);
 374
 375 #endif