root/include/linux/hwmon.h

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INCLUDED FROM


DEFINITIONS

This source file includes following definitions.
  1. hwmon_is_bad_char

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

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