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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
17struct device;
18struct attribute_group;
19
20enum 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
33enum 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
61enum 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
113enum 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
149enum 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
183enum 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
243enum 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
251enum 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
271enum 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
297enum 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 */
354struct 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 */
371struct 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 */
389struct hwmon_chip_info {
390 const struct hwmon_ops *ops;
391 const struct hwmon_channel_info **info;
392};
393
394/* hwmon_device_register() is deprecated */
395struct device *hwmon_device_register(struct device *dev);
396
397struct device *
398hwmon_device_register_with_groups(struct device *dev, const char *name,
399 void *drvdata,
400 const struct attribute_group **groups);
401struct device *
402devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
403 void *drvdata,
404 const struct attribute_group **groups);
405struct device *
406hwmon_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);
410struct device *
411devm_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
416void hwmon_device_unregister(struct device *dev);
417void 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 */
428static 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