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 };
  32
  33 enum hwmon_chip_attributes {
  34         hwmon_chip_temp_reset_history,
  35         hwmon_chip_in_reset_history,
  36         hwmon_chip_curr_reset_history,
  37         hwmon_chip_power_reset_history,
  38         hwmon_chip_register_tz,
  39         hwmon_chip_update_interval,
  40         hwmon_chip_alarms,
  41 };
  42
  43 #define HWMON_C_TEMP_RESET_HISTORY      BIT(hwmon_chip_temp_reset_history)
  44 #define HWMON_C_IN_RESET_HISTORY        BIT(hwmon_chip_in_reset_history)
  45 #define HWMON_C_CURR_RESET_HISTORY      BIT(hwmon_chip_curr_reset_history)
  46 #define HWMON_C_POWER_RESET_HISTORY     BIT(hwmon_chip_power_reset_history)
  47 #define HWMON_C_REGISTER_TZ             BIT(hwmon_chip_register_tz)
  48 #define HWMON_C_UPDATE_INTERVAL         BIT(hwmon_chip_update_interval)
  49 #define HWMON_C_ALARMS                  BIT(hwmon_chip_alarms)
  50
  51 enum hwmon_temp_attributes {
  52         hwmon_temp_input = 0,
  53         hwmon_temp_type,
  54         hwmon_temp_lcrit,
  55         hwmon_temp_lcrit_hyst,
  56         hwmon_temp_min,
  57         hwmon_temp_min_hyst,
  58         hwmon_temp_max,
  59         hwmon_temp_max_hyst,
  60         hwmon_temp_crit,
  61         hwmon_temp_crit_hyst,
  62         hwmon_temp_emergency,
  63         hwmon_temp_emergency_hyst,
  64         hwmon_temp_alarm,
  65         hwmon_temp_lcrit_alarm,
  66         hwmon_temp_min_alarm,
  67         hwmon_temp_max_alarm,
  68         hwmon_temp_crit_alarm,
  69         hwmon_temp_emergency_alarm,
  70         hwmon_temp_fault,
  71         hwmon_temp_offset,
  72         hwmon_temp_label,
  73         hwmon_temp_lowest,
  74         hwmon_temp_highest,
  75         hwmon_temp_reset_history,
  76 };
  77
  78 #define HWMON_T_INPUT           BIT(hwmon_temp_input)
  79 #define HWMON_T_TYPE            BIT(hwmon_temp_type)
  80 #define HWMON_T_LCRIT           BIT(hwmon_temp_lcrit)
  81 #define HWMON_T_LCRIT_HYST      BIT(hwmon_temp_lcrit_hyst)
  82 #define HWMON_T_MIN             BIT(hwmon_temp_min)
  83 #define HWMON_T_MIN_HYST        BIT(hwmon_temp_min_hyst)
  84 #define HWMON_T_MAX             BIT(hwmon_temp_max)
  85 #define HWMON_T_MAX_HYST        BIT(hwmon_temp_max_hyst)
  86 #define HWMON_T_CRIT            BIT(hwmon_temp_crit)
  87 #define HWMON_T_CRIT_HYST       BIT(hwmon_temp_crit_hyst)
  88 #define HWMON_T_EMERGENCY       BIT(hwmon_temp_emergency)
  89 #define HWMON_T_EMERGENCY_HYST  BIT(hwmon_temp_emergency_hyst)
  90 #define HWMON_T_MIN_ALARM       BIT(hwmon_temp_min_alarm)
  91 #define HWMON_T_MAX_ALARM       BIT(hwmon_temp_max_alarm)
  92 #define HWMON_T_CRIT_ALARM      BIT(hwmon_temp_crit_alarm)
  93 #define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm)
  94 #define HWMON_T_FAULT           BIT(hwmon_temp_fault)
  95 #define HWMON_T_OFFSET          BIT(hwmon_temp_offset)
  96 #define HWMON_T_LABEL           BIT(hwmon_temp_label)
  97 #define HWMON_T_LOWEST          BIT(hwmon_temp_lowest)
  98 #define HWMON_T_HIGHEST         BIT(hwmon_temp_highest)
  99 #define HWMON_T_RESET_HISTORY   BIT(hwmon_temp_reset_history)
 100
 101 enum hwmon_in_attributes {
 102         hwmon_in_input,
 103         hwmon_in_min,
 104         hwmon_in_max,
 105         hwmon_in_lcrit,
 106         hwmon_in_crit,
 107         hwmon_in_average,
 108         hwmon_in_lowest,
 109         hwmon_in_highest,
 110         hwmon_in_reset_history,
 111         hwmon_in_label,
 112         hwmon_in_alarm,
 113         hwmon_in_min_alarm,
 114         hwmon_in_max_alarm,
 115         hwmon_in_lcrit_alarm,
 116         hwmon_in_crit_alarm,
 117 };
 118
 119 #define HWMON_I_INPUT           BIT(hwmon_in_input)
 120 #define HWMON_I_MIN             BIT(hwmon_in_min)
 121 #define HWMON_I_MAX             BIT(hwmon_in_max)
 122 #define HWMON_I_LCRIT           BIT(hwmon_in_lcrit)
 123 #define HWMON_I_CRIT            BIT(hwmon_in_crit)
 124 #define HWMON_I_AVERAGE         BIT(hwmon_in_average)
 125 #define HWMON_I_LOWEST          BIT(hwmon_in_lowest)
 126 #define HWMON_I_HIGHEST         BIT(hwmon_in_highest)
 127 #define HWMON_I_RESET_HISTORY   BIT(hwmon_in_reset_history)
 128 #define HWMON_I_LABEL           BIT(hwmon_in_label)
 129 #define HWMON_I_ALARM           BIT(hwmon_in_alarm)
 130 #define HWMON_I_MIN_ALARM       BIT(hwmon_in_min_alarm)
 131 #define HWMON_I_MAX_ALARM       BIT(hwmon_in_max_alarm)
 132 #define HWMON_I_LCRIT_ALARM     BIT(hwmon_in_lcrit_alarm)
 133 #define HWMON_I_CRIT_ALARM      BIT(hwmon_in_crit_alarm)
 134
 135 enum hwmon_curr_attributes {
 136         hwmon_curr_input,
 137         hwmon_curr_min,
 138         hwmon_curr_max,
 139         hwmon_curr_lcrit,
 140         hwmon_curr_crit,
 141         hwmon_curr_average,
 142         hwmon_curr_lowest,
 143         hwmon_curr_highest,
 144         hwmon_curr_reset_history,
 145         hwmon_curr_label,
 146         hwmon_curr_alarm,
 147         hwmon_curr_min_alarm,
 148         hwmon_curr_max_alarm,
 149         hwmon_curr_lcrit_alarm,
 150         hwmon_curr_crit_alarm,
 151 };
 152
 153 #define HWMON_C_INPUT           BIT(hwmon_curr_input)
 154 #define HWMON_C_MIN             BIT(hwmon_curr_min)
 155 #define HWMON_C_MAX             BIT(hwmon_curr_max)
 156 #define HWMON_C_LCRIT           BIT(hwmon_curr_lcrit)
 157 #define HWMON_C_CRIT            BIT(hwmon_curr_crit)
 158 #define HWMON_C_AVERAGE         BIT(hwmon_curr_average)
 159 #define HWMON_C_LOWEST          BIT(hwmon_curr_lowest)
 160 #define HWMON_C_HIGHEST         BIT(hwmon_curr_highest)
 161 #define HWMON_C_RESET_HISTORY   BIT(hwmon_curr_reset_history)
 162 #define HWMON_C_LABEL           BIT(hwmon_curr_label)
 163 #define HWMON_C_ALARM           BIT(hwmon_curr_alarm)
 164 #define HWMON_C_MIN_ALARM       BIT(hwmon_curr_min_alarm)
 165 #define HWMON_C_MAX_ALARM       BIT(hwmon_curr_max_alarm)
 166 #define HWMON_C_LCRIT_ALARM     BIT(hwmon_curr_lcrit_alarm)
 167 #define HWMON_C_CRIT_ALARM      BIT(hwmon_curr_crit_alarm)
 168
 169 enum hwmon_power_attributes {
 170         hwmon_power_average,
 171         hwmon_power_average_interval,
 172         hwmon_power_average_interval_max,
 173         hwmon_power_average_interval_min,
 174         hwmon_power_average_highest,
 175         hwmon_power_average_lowest,
 176         hwmon_power_average_max,
 177         hwmon_power_average_min,
 178         hwmon_power_input,
 179         hwmon_power_input_highest,
 180         hwmon_power_input_lowest,
 181         hwmon_power_reset_history,
 182         hwmon_power_accuracy,
 183         hwmon_power_cap,
 184         hwmon_power_cap_hyst,
 185         hwmon_power_cap_max,
 186         hwmon_power_cap_min,
 187         hwmon_power_max,
 188         hwmon_power_crit,
 189         hwmon_power_label,
 190         hwmon_power_alarm,
 191         hwmon_power_cap_alarm,
 192         hwmon_power_max_alarm,
 193         hwmon_power_crit_alarm,
 194 };
 195
 196 #define HWMON_P_AVERAGE                 BIT(hwmon_power_average)
 197 #define HWMON_P_AVERAGE_INTERVAL        BIT(hwmon_power_average_interval)
 198 #define HWMON_P_AVERAGE_INTERVAL_MAX    BIT(hwmon_power_average_interval_max)
 199 #define HWMON_P_AVERAGE_INTERVAL_MIN    BIT(hwmon_power_average_interval_min)
 200 #define HWMON_P_AVERAGE_HIGHEST         BIT(hwmon_power_average_highest)
 201 #define HWMON_P_AVERAGE_LOWEST          BIT(hwmon_power_average_lowest)
 202 #define HWMON_P_AVERAGE_MAX             BIT(hwmon_power_average_max)
 203 #define HWMON_P_AVERAGE_MIN             BIT(hwmon_power_average_min)
 204 #define HWMON_P_INPUT                   BIT(hwmon_power_input)
 205 #define HWMON_P_INPUT_HIGHEST           BIT(hwmon_power_input_highest)
 206 #define HWMON_P_INPUT_LOWEST            BIT(hwmon_power_input_lowest)
 207 #define HWMON_P_RESET_HISTORY           BIT(hwmon_power_reset_history)
 208 #define HWMON_P_ACCURACY                BIT(hwmon_power_accuracy)
 209 #define HWMON_P_CAP                     BIT(hwmon_power_cap)
 210 #define HWMON_P_CAP_HYST                BIT(hwmon_power_cap_hyst)
 211 #define HWMON_P_CAP_MAX                 BIT(hwmon_power_cap_max)
 212 #define HWMON_P_CAP_MIN                 BIT(hwmon_power_cap_min)
 213 #define HWMON_P_MAX                     BIT(hwmon_power_max)
 214 #define HWMON_P_CRIT                    BIT(hwmon_power_crit)
 215 #define HWMON_P_LABEL                   BIT(hwmon_power_label)
 216 #define HWMON_P_ALARM                   BIT(hwmon_power_alarm)
 217 #define HWMON_P_CAP_ALARM               BIT(hwmon_power_cap_alarm)
 218 #define HWMON_P_MAX_ALARM               BIT(hwmon_power_max_alarm)
 219 #define HWMON_P_CRIT_ALARM              BIT(hwmon_power_crit_alarm)
 220
 221 enum hwmon_energy_attributes {
 222         hwmon_energy_input,
 223         hwmon_energy_label,
 224 };
 225
 226 #define HWMON_E_INPUT                   BIT(hwmon_energy_input)
 227 #define HWMON_E_LABEL                   BIT(hwmon_energy_label)
 228
 229 enum hwmon_humidity_attributes {
 230         hwmon_humidity_input,
 231         hwmon_humidity_label,
 232         hwmon_humidity_min,
 233         hwmon_humidity_min_hyst,
 234         hwmon_humidity_max,
 235         hwmon_humidity_max_hyst,
 236         hwmon_humidity_alarm,
 237         hwmon_humidity_fault,
 238 };
 239
 240 #define HWMON_H_INPUT                   BIT(hwmon_humidity_input)
 241 #define HWMON_H_LABEL                   BIT(hwmon_humidity_label)
 242 #define HWMON_H_MIN                     BIT(hwmon_humidity_min)
 243 #define HWMON_H_MIN_HYST                BIT(hwmon_humidity_min_hyst)
 244 #define HWMON_H_MAX                     BIT(hwmon_humidity_max)
 245 #define HWMON_H_MAX_HYST                BIT(hwmon_humidity_max_hyst)
 246 #define HWMON_H_ALARM                   BIT(hwmon_humidity_alarm)
 247 #define HWMON_H_FAULT                   BIT(hwmon_humidity_fault)
 248
 249 enum hwmon_fan_attributes {
 250         hwmon_fan_input,
 251         hwmon_fan_label,
 252         hwmon_fan_min,
 253         hwmon_fan_max,
 254         hwmon_fan_div,
 255         hwmon_fan_pulses,
 256         hwmon_fan_target,
 257         hwmon_fan_alarm,
 258         hwmon_fan_min_alarm,
 259         hwmon_fan_max_alarm,
 260         hwmon_fan_fault,
 261 };
 262
 263 #define HWMON_F_INPUT                   BIT(hwmon_fan_input)
 264 #define HWMON_F_LABEL                   BIT(hwmon_fan_label)
 265 #define HWMON_F_MIN                     BIT(hwmon_fan_min)
 266 #define HWMON_F_MAX                     BIT(hwmon_fan_max)
 267 #define HWMON_F_DIV                     BIT(hwmon_fan_div)
 268 #define HWMON_F_PULSES                  BIT(hwmon_fan_pulses)
 269 #define HWMON_F_TARGET                  BIT(hwmon_fan_target)
 270 #define HWMON_F_ALARM                   BIT(hwmon_fan_alarm)
 271 #define HWMON_F_MIN_ALARM               BIT(hwmon_fan_min_alarm)
 272 #define HWMON_F_MAX_ALARM               BIT(hwmon_fan_max_alarm)
 273 #define HWMON_F_FAULT                   BIT(hwmon_fan_fault)
 274
 275 /**
 276  * struct hwmon_ops - hwmon device operations
 277  * @is_visible: Callback to return attribute visibility. Mandatory.
 278  *              Parameters are:
 279  *              @const void *drvdata:
 280  *                      Pointer to driver-private data structure passed
 281  *                      as argument to hwmon_device_register_with_info().
 282  *              @type:  Sensor type
 283  *              @attr:  Sensor attribute
 284  *              @channel:
 285  *                      Channel number
 286  *              The function returns the file permissions.
 287  *              If the return value is 0, no attribute will be created.
 288  * @read:       Read callback. Optional. If not provided, attributes
 289  *              will not be readable.
 290  *              Parameters are:
 291  *              @dev:   Pointer to hardware monitoring device
 292  *              @type:  Sensor type
 293  *              @attr:  Sensor attribute
 294  *              @channel:
 295  *                      Channel number
 296  *              @val:   Pointer to returned value
 297  *              The function returns 0 on success or a negative error number.
 298  * @write:      Write callback. Optional. If not provided, attributes
 299  *              will not be writable.
 300  *              Parameters are:
 301  *              @dev:   Pointer to hardware monitoring device
 302  *              @type:  Sensor type
 303  *              @attr:  Sensor attribute
 304  *              @channel:
 305  *                      Channel number
 306  *              @val:   Value to write
 307  *              The function returns 0 on success or a negative error number.
 308  */
 309 struct hwmon_ops {
 310         umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
 311                               u32 attr, int channel);
 312         int (*read)(struct device *dev, enum hwmon_sensor_types type,
 313                     u32 attr, int channel, long *val);
 314         int (*write)(struct device *dev, enum hwmon_sensor_types type,
 315                      u32 attr, int channel, long val);
 316 };
 317
 318 /**
 319  * Channel information
 320  * @type:       Channel type.
 321  * @config:     Pointer to NULL-terminated list of channel parameters.
 322  *              Use for per-channel attributes.
 323  */
 324 struct hwmon_channel_info {
 325         enum hwmon_sensor_types type;
 326         const u32 *config;
 327 };
 328
 329 /**
 330  * Chip configuration
 331  * @ops:        Pointer to hwmon operations.
 332  * @info:       Null-terminated list of channel information.
 333  */
 334 struct hwmon_chip_info {
 335         const struct hwmon_ops *ops;
 336         const struct hwmon_channel_info **info;
 337 };
 338
 339 struct device *hwmon_device_register(struct device *dev);
 340 struct device *
 341 hwmon_device_register_with_groups(struct device *dev, const char *name,
 342                                   void *drvdata,
 343                                   const struct attribute_group **groups);
 344 struct device *
 345 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
 346                                        void *drvdata,
 347                                        const struct attribute_group **groups);
 348 struct device *
 349 hwmon_device_register_with_info(struct device *dev,
 350                                 const char *name, void *drvdata,
 351                                 const struct hwmon_chip_info *info,
 352                                 const struct attribute_group **groups);
 353 struct device *
 354 devm_hwmon_device_register_with_info(struct device *dev,
 355                                      const char *name, void *drvdata,
 356                                      const struct hwmon_chip_info *info,
 357                                      const struct attribute_group **groups);
 358
 359 void hwmon_device_unregister(struct device *dev);
 360 void devm_hwmon_device_unregister(struct device *dev);
 361
 362 #endif