1 /* SPDX-License-Identifier: GPL-2.0-only */
3 hwmon.h - part of lm_sensors, Linux kernel modules for hardware monitoring
5 This file declares helper functions for the sysfs class "hwmon",
6 for use by sensors drivers.
8 Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com>
15 #include <linux/bitops.h>
18 struct attribute_group;
20 enum hwmon_sensor_types {
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,
43 hwmon_chip_curr_samples,
44 hwmon_chip_in_samples,
45 hwmon_chip_power_samples,
46 hwmon_chip_temp_samples,
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)
62 enum hwmon_temp_attributes {
67 hwmon_temp_lcrit_hyst,
75 hwmon_temp_emergency_hyst,
77 hwmon_temp_lcrit_alarm,
80 hwmon_temp_crit_alarm,
81 hwmon_temp_emergency_alarm,
87 hwmon_temp_reset_history,
92 #define HWMON_T_ENABLE BIT(hwmon_temp_enable)
93 #define HWMON_T_INPUT BIT(hwmon_temp_input)
94 #define HWMON_T_TYPE BIT(hwmon_temp_type)
95 #define HWMON_T_LCRIT BIT(hwmon_temp_lcrit)
96 #define HWMON_T_LCRIT_HYST BIT(hwmon_temp_lcrit_hyst)
97 #define HWMON_T_MIN BIT(hwmon_temp_min)
98 #define HWMON_T_MIN_HYST BIT(hwmon_temp_min_hyst)
99 #define HWMON_T_MAX BIT(hwmon_temp_max)
100 #define HWMON_T_MAX_HYST BIT(hwmon_temp_max_hyst)
101 #define HWMON_T_CRIT BIT(hwmon_temp_crit)
102 #define HWMON_T_CRIT_HYST BIT(hwmon_temp_crit_hyst)
103 #define HWMON_T_EMERGENCY BIT(hwmon_temp_emergency)
104 #define HWMON_T_EMERGENCY_HYST BIT(hwmon_temp_emergency_hyst)
105 #define HWMON_T_ALARM BIT(hwmon_temp_alarm)
106 #define HWMON_T_MIN_ALARM BIT(hwmon_temp_min_alarm)
107 #define HWMON_T_MAX_ALARM BIT(hwmon_temp_max_alarm)
108 #define HWMON_T_CRIT_ALARM BIT(hwmon_temp_crit_alarm)
109 #define HWMON_T_LCRIT_ALARM BIT(hwmon_temp_lcrit_alarm)
110 #define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm)
111 #define HWMON_T_FAULT BIT(hwmon_temp_fault)
112 #define HWMON_T_OFFSET BIT(hwmon_temp_offset)
113 #define HWMON_T_LABEL BIT(hwmon_temp_label)
114 #define HWMON_T_LOWEST BIT(hwmon_temp_lowest)
115 #define HWMON_T_HIGHEST BIT(hwmon_temp_highest)
116 #define HWMON_T_RESET_HISTORY BIT(hwmon_temp_reset_history)
117 #define HWMON_T_RATED_MIN BIT(hwmon_temp_rated_min)
118 #define HWMON_T_RATED_MAX BIT(hwmon_temp_rated_max)
120 enum hwmon_in_attributes {
130 hwmon_in_reset_history,
135 hwmon_in_lcrit_alarm,
141 #define HWMON_I_ENABLE BIT(hwmon_in_enable)
142 #define HWMON_I_INPUT BIT(hwmon_in_input)
143 #define HWMON_I_MIN BIT(hwmon_in_min)
144 #define HWMON_I_MAX BIT(hwmon_in_max)
145 #define HWMON_I_LCRIT BIT(hwmon_in_lcrit)
146 #define HWMON_I_CRIT BIT(hwmon_in_crit)
147 #define HWMON_I_AVERAGE BIT(hwmon_in_average)
148 #define HWMON_I_LOWEST BIT(hwmon_in_lowest)
149 #define HWMON_I_HIGHEST BIT(hwmon_in_highest)
150 #define HWMON_I_RESET_HISTORY BIT(hwmon_in_reset_history)
151 #define HWMON_I_LABEL BIT(hwmon_in_label)
152 #define HWMON_I_ALARM BIT(hwmon_in_alarm)
153 #define HWMON_I_MIN_ALARM BIT(hwmon_in_min_alarm)
154 #define HWMON_I_MAX_ALARM BIT(hwmon_in_max_alarm)
155 #define HWMON_I_LCRIT_ALARM BIT(hwmon_in_lcrit_alarm)
156 #define HWMON_I_CRIT_ALARM BIT(hwmon_in_crit_alarm)
157 #define HWMON_I_RATED_MIN BIT(hwmon_in_rated_min)
158 #define HWMON_I_RATED_MAX BIT(hwmon_in_rated_max)
160 enum hwmon_curr_attributes {
170 hwmon_curr_reset_history,
173 hwmon_curr_min_alarm,
174 hwmon_curr_max_alarm,
175 hwmon_curr_lcrit_alarm,
176 hwmon_curr_crit_alarm,
177 hwmon_curr_rated_min,
178 hwmon_curr_rated_max,
181 #define HWMON_C_ENABLE BIT(hwmon_curr_enable)
182 #define HWMON_C_INPUT BIT(hwmon_curr_input)
183 #define HWMON_C_MIN BIT(hwmon_curr_min)
184 #define HWMON_C_MAX BIT(hwmon_curr_max)
185 #define HWMON_C_LCRIT BIT(hwmon_curr_lcrit)
186 #define HWMON_C_CRIT BIT(hwmon_curr_crit)
187 #define HWMON_C_AVERAGE BIT(hwmon_curr_average)
188 #define HWMON_C_LOWEST BIT(hwmon_curr_lowest)
189 #define HWMON_C_HIGHEST BIT(hwmon_curr_highest)
190 #define HWMON_C_RESET_HISTORY BIT(hwmon_curr_reset_history)
191 #define HWMON_C_LABEL BIT(hwmon_curr_label)
192 #define HWMON_C_ALARM BIT(hwmon_curr_alarm)
193 #define HWMON_C_MIN_ALARM BIT(hwmon_curr_min_alarm)
194 #define HWMON_C_MAX_ALARM BIT(hwmon_curr_max_alarm)
195 #define HWMON_C_LCRIT_ALARM BIT(hwmon_curr_lcrit_alarm)
196 #define HWMON_C_CRIT_ALARM BIT(hwmon_curr_crit_alarm)
197 #define HWMON_C_RATED_MIN BIT(hwmon_curr_rated_min)
198 #define HWMON_C_RATED_MAX BIT(hwmon_curr_rated_max)
200 enum hwmon_power_attributes {
203 hwmon_power_average_interval,
204 hwmon_power_average_interval_max,
205 hwmon_power_average_interval_min,
206 hwmon_power_average_highest,
207 hwmon_power_average_lowest,
208 hwmon_power_average_max,
209 hwmon_power_average_min,
211 hwmon_power_input_highest,
212 hwmon_power_input_lowest,
213 hwmon_power_reset_history,
214 hwmon_power_accuracy,
216 hwmon_power_cap_hyst,
225 hwmon_power_cap_alarm,
226 hwmon_power_min_alarm,
227 hwmon_power_max_alarm,
228 hwmon_power_lcrit_alarm,
229 hwmon_power_crit_alarm,
230 hwmon_power_rated_min,
231 hwmon_power_rated_max,
234 #define HWMON_P_ENABLE BIT(hwmon_power_enable)
235 #define HWMON_P_AVERAGE BIT(hwmon_power_average)
236 #define HWMON_P_AVERAGE_INTERVAL BIT(hwmon_power_average_interval)
237 #define HWMON_P_AVERAGE_INTERVAL_MAX BIT(hwmon_power_average_interval_max)
238 #define HWMON_P_AVERAGE_INTERVAL_MIN BIT(hwmon_power_average_interval_min)
239 #define HWMON_P_AVERAGE_HIGHEST BIT(hwmon_power_average_highest)
240 #define HWMON_P_AVERAGE_LOWEST BIT(hwmon_power_average_lowest)
241 #define HWMON_P_AVERAGE_MAX BIT(hwmon_power_average_max)
242 #define HWMON_P_AVERAGE_MIN BIT(hwmon_power_average_min)
243 #define HWMON_P_INPUT BIT(hwmon_power_input)
244 #define HWMON_P_INPUT_HIGHEST BIT(hwmon_power_input_highest)
245 #define HWMON_P_INPUT_LOWEST BIT(hwmon_power_input_lowest)
246 #define HWMON_P_RESET_HISTORY BIT(hwmon_power_reset_history)
247 #define HWMON_P_ACCURACY BIT(hwmon_power_accuracy)
248 #define HWMON_P_CAP BIT(hwmon_power_cap)
249 #define HWMON_P_CAP_HYST BIT(hwmon_power_cap_hyst)
250 #define HWMON_P_CAP_MAX BIT(hwmon_power_cap_max)
251 #define HWMON_P_CAP_MIN BIT(hwmon_power_cap_min)
252 #define HWMON_P_MIN BIT(hwmon_power_min)
253 #define HWMON_P_MAX BIT(hwmon_power_max)
254 #define HWMON_P_LCRIT BIT(hwmon_power_lcrit)
255 #define HWMON_P_CRIT BIT(hwmon_power_crit)
256 #define HWMON_P_LABEL BIT(hwmon_power_label)
257 #define HWMON_P_ALARM BIT(hwmon_power_alarm)
258 #define HWMON_P_CAP_ALARM BIT(hwmon_power_cap_alarm)
259 #define HWMON_P_MIN_ALARM BIT(hwmon_power_min_alarm)
260 #define HWMON_P_MAX_ALARM BIT(hwmon_power_max_alarm)
261 #define HWMON_P_LCRIT_ALARM BIT(hwmon_power_lcrit_alarm)
262 #define HWMON_P_CRIT_ALARM BIT(hwmon_power_crit_alarm)
263 #define HWMON_P_RATED_MIN BIT(hwmon_power_rated_min)
264 #define HWMON_P_RATED_MAX BIT(hwmon_power_rated_max)
266 enum hwmon_energy_attributes {
272 #define HWMON_E_ENABLE BIT(hwmon_energy_enable)
273 #define HWMON_E_INPUT BIT(hwmon_energy_input)
274 #define HWMON_E_LABEL BIT(hwmon_energy_label)
276 enum hwmon_humidity_attributes {
277 hwmon_humidity_enable,
278 hwmon_humidity_input,
279 hwmon_humidity_label,
281 hwmon_humidity_min_hyst,
283 hwmon_humidity_max_hyst,
284 hwmon_humidity_alarm,
285 hwmon_humidity_fault,
286 hwmon_humidity_rated_min,
287 hwmon_humidity_rated_max,
290 #define HWMON_H_ENABLE BIT(hwmon_humidity_enable)
291 #define HWMON_H_INPUT BIT(hwmon_humidity_input)
292 #define HWMON_H_LABEL BIT(hwmon_humidity_label)
293 #define HWMON_H_MIN BIT(hwmon_humidity_min)
294 #define HWMON_H_MIN_HYST BIT(hwmon_humidity_min_hyst)
295 #define HWMON_H_MAX BIT(hwmon_humidity_max)
296 #define HWMON_H_MAX_HYST BIT(hwmon_humidity_max_hyst)
297 #define HWMON_H_ALARM BIT(hwmon_humidity_alarm)
298 #define HWMON_H_FAULT BIT(hwmon_humidity_fault)
299 #define HWMON_H_RATED_MIN BIT(hwmon_humidity_rated_min)
300 #define HWMON_H_RATED_MAX BIT(hwmon_humidity_rated_max)
302 enum hwmon_fan_attributes {
317 #define HWMON_F_ENABLE BIT(hwmon_fan_enable)
318 #define HWMON_F_INPUT BIT(hwmon_fan_input)
319 #define HWMON_F_LABEL BIT(hwmon_fan_label)
320 #define HWMON_F_MIN BIT(hwmon_fan_min)
321 #define HWMON_F_MAX BIT(hwmon_fan_max)
322 #define HWMON_F_DIV BIT(hwmon_fan_div)
323 #define HWMON_F_PULSES BIT(hwmon_fan_pulses)
324 #define HWMON_F_TARGET BIT(hwmon_fan_target)
325 #define HWMON_F_ALARM BIT(hwmon_fan_alarm)
326 #define HWMON_F_MIN_ALARM BIT(hwmon_fan_min_alarm)
327 #define HWMON_F_MAX_ALARM BIT(hwmon_fan_max_alarm)
328 #define HWMON_F_FAULT BIT(hwmon_fan_fault)
330 enum hwmon_pwm_attributes {
337 #define HWMON_PWM_INPUT BIT(hwmon_pwm_input)
338 #define HWMON_PWM_ENABLE BIT(hwmon_pwm_enable)
339 #define HWMON_PWM_MODE BIT(hwmon_pwm_mode)
340 #define HWMON_PWM_FREQ BIT(hwmon_pwm_freq)
342 enum hwmon_intrusion_attributes {
343 hwmon_intrusion_alarm,
344 hwmon_intrusion_beep,
346 #define HWMON_INTRUSION_ALARM BIT(hwmon_intrusion_alarm)
347 #define HWMON_INTRUSION_BEEP BIT(hwmon_intrusion_beep)
350 * struct hwmon_ops - hwmon device operations
351 * @is_visible: Callback to return attribute visibility. Mandatory.
353 * @const void *drvdata:
354 * Pointer to driver-private data structure passed
355 * as argument to hwmon_device_register_with_info().
357 * @attr: Sensor attribute
360 * The function returns the file permissions.
361 * If the return value is 0, no attribute will be created.
362 * @read: Read callback for data attributes. Mandatory if readable
363 * data attributes are present.
365 * @dev: Pointer to hardware monitoring device
367 * @attr: Sensor attribute
370 * @val: Pointer to returned value
371 * The function returns 0 on success or a negative error number.
373 * Read callback for string attributes. Mandatory if string
374 * attributes are present.
376 * @dev: Pointer to hardware monitoring device
378 * @attr: Sensor attribute
381 * @str: Pointer to returned string
382 * The function returns 0 on success or a negative error number.
383 * @write: Write callback for data attributes. Mandatory if writeable
384 * data attributes are present.
386 * @dev: Pointer to hardware monitoring device
388 * @attr: Sensor attribute
391 * @val: Value to write
392 * The function returns 0 on success or a negative error number.
395 umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
396 u32 attr, int channel);
397 int (*read)(struct device *dev, enum hwmon_sensor_types type,
398 u32 attr, int channel, long *val);
399 int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
400 u32 attr, int channel, const char **str);
401 int (*write)(struct device *dev, enum hwmon_sensor_types type,
402 u32 attr, int channel, long val);
406 * Channel information
407 * @type: Channel type.
408 * @config: Pointer to NULL-terminated list of channel parameters.
409 * Use for per-channel attributes.
411 struct hwmon_channel_info {
412 enum hwmon_sensor_types type;
416 #define HWMON_CHANNEL_INFO(stype, ...) \
417 (&(struct hwmon_channel_info) { \
418 .type = hwmon_##stype, \
419 .config = (u32 []) { \
426 * @ops: Pointer to hwmon operations.
427 * @info: Null-terminated list of channel information.
429 struct hwmon_chip_info {
430 const struct hwmon_ops *ops;
431 const struct hwmon_channel_info **info;
434 /* hwmon_device_register() is deprecated */
435 struct device *hwmon_device_register(struct device *dev);
438 hwmon_device_register_with_groups(struct device *dev, const char *name,
440 const struct attribute_group **groups);
442 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
444 const struct attribute_group **groups);
446 hwmon_device_register_with_info(struct device *dev,
447 const char *name, void *drvdata,
448 const struct hwmon_chip_info *info,
449 const struct attribute_group **extra_groups);
451 devm_hwmon_device_register_with_info(struct device *dev,
452 const char *name, void *drvdata,
453 const struct hwmon_chip_info *info,
454 const struct attribute_group **extra_groups);
456 void hwmon_device_unregister(struct device *dev);
457 void devm_hwmon_device_unregister(struct device *dev);
459 int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
460 u32 attr, int channel);
463 * hwmon_is_bad_char - Is the char invalid in a hwmon name
464 * @ch: the char to be considered
466 * hwmon_is_bad_char() can be used to determine if the given character
467 * may not be used in a hwmon name.
469 * Returns true if the char is invalid, false otherwise.
471 static inline bool hwmon_is_bad_char(const char ch)