xref: /openbmc/linux/include/linux/hwmon.h (revision fc772314) 
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_intrusion,
31 	hwmon_max,
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 	hwmon_chip_samples,
43 	hwmon_chip_curr_samples,
44 	hwmon_chip_in_samples,
45 	hwmon_chip_power_samples,
46 	hwmon_chip_temp_samples,
47 };
48 
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)
61 
62 enum hwmon_temp_attributes {
63 	hwmon_temp_enable,
64 	hwmon_temp_input,
65 	hwmon_temp_type,
66 	hwmon_temp_lcrit,
67 	hwmon_temp_lcrit_hyst,
68 	hwmon_temp_min,
69 	hwmon_temp_min_hyst,
70 	hwmon_temp_max,
71 	hwmon_temp_max_hyst,
72 	hwmon_temp_crit,
73 	hwmon_temp_crit_hyst,
74 	hwmon_temp_emergency,
75 	hwmon_temp_emergency_hyst,
76 	hwmon_temp_alarm,
77 	hwmon_temp_lcrit_alarm,
78 	hwmon_temp_min_alarm,
79 	hwmon_temp_max_alarm,
80 	hwmon_temp_crit_alarm,
81 	hwmon_temp_emergency_alarm,
82 	hwmon_temp_fault,
83 	hwmon_temp_offset,
84 	hwmon_temp_label,
85 	hwmon_temp_lowest,
86 	hwmon_temp_highest,
87 	hwmon_temp_reset_history,
88 };
89 
90 #define HWMON_T_ENABLE		BIT(hwmon_temp_enable)
91 #define HWMON_T_INPUT		BIT(hwmon_temp_input)
92 #define HWMON_T_TYPE		BIT(hwmon_temp_type)
93 #define HWMON_T_LCRIT		BIT(hwmon_temp_lcrit)
94 #define HWMON_T_LCRIT_HYST	BIT(hwmon_temp_lcrit_hyst)
95 #define HWMON_T_MIN		BIT(hwmon_temp_min)
96 #define HWMON_T_MIN_HYST	BIT(hwmon_temp_min_hyst)
97 #define HWMON_T_MAX		BIT(hwmon_temp_max)
98 #define HWMON_T_MAX_HYST	BIT(hwmon_temp_max_hyst)
99 #define HWMON_T_CRIT		BIT(hwmon_temp_crit)
100 #define HWMON_T_CRIT_HYST	BIT(hwmon_temp_crit_hyst)
101 #define HWMON_T_EMERGENCY	BIT(hwmon_temp_emergency)
102 #define HWMON_T_EMERGENCY_HYST	BIT(hwmon_temp_emergency_hyst)
103 #define HWMON_T_ALARM		BIT(hwmon_temp_alarm)
104 #define HWMON_T_MIN_ALARM	BIT(hwmon_temp_min_alarm)
105 #define HWMON_T_MAX_ALARM	BIT(hwmon_temp_max_alarm)
106 #define HWMON_T_CRIT_ALARM	BIT(hwmon_temp_crit_alarm)
107 #define HWMON_T_LCRIT_ALARM	BIT(hwmon_temp_lcrit_alarm)
108 #define HWMON_T_EMERGENCY_ALARM	BIT(hwmon_temp_emergency_alarm)
109 #define HWMON_T_FAULT		BIT(hwmon_temp_fault)
110 #define HWMON_T_OFFSET		BIT(hwmon_temp_offset)
111 #define HWMON_T_LABEL		BIT(hwmon_temp_label)
112 #define HWMON_T_LOWEST		BIT(hwmon_temp_lowest)
113 #define HWMON_T_HIGHEST		BIT(hwmon_temp_highest)
114 #define HWMON_T_RESET_HISTORY	BIT(hwmon_temp_reset_history)
115 
116 enum hwmon_in_attributes {
117 	hwmon_in_enable,
118 	hwmon_in_input,
119 	hwmon_in_min,
120 	hwmon_in_max,
121 	hwmon_in_lcrit,
122 	hwmon_in_crit,
123 	hwmon_in_average,
124 	hwmon_in_lowest,
125 	hwmon_in_highest,
126 	hwmon_in_reset_history,
127 	hwmon_in_label,
128 	hwmon_in_alarm,
129 	hwmon_in_min_alarm,
130 	hwmon_in_max_alarm,
131 	hwmon_in_lcrit_alarm,
132 	hwmon_in_crit_alarm,
133 };
134 
135 #define HWMON_I_ENABLE		BIT(hwmon_in_enable)
136 #define HWMON_I_INPUT		BIT(hwmon_in_input)
137 #define HWMON_I_MIN		BIT(hwmon_in_min)
138 #define HWMON_I_MAX		BIT(hwmon_in_max)
139 #define HWMON_I_LCRIT		BIT(hwmon_in_lcrit)
140 #define HWMON_I_CRIT		BIT(hwmon_in_crit)
141 #define HWMON_I_AVERAGE		BIT(hwmon_in_average)
142 #define HWMON_I_LOWEST		BIT(hwmon_in_lowest)
143 #define HWMON_I_HIGHEST		BIT(hwmon_in_highest)
144 #define HWMON_I_RESET_HISTORY	BIT(hwmon_in_reset_history)
145 #define HWMON_I_LABEL		BIT(hwmon_in_label)
146 #define HWMON_I_ALARM		BIT(hwmon_in_alarm)
147 #define HWMON_I_MIN_ALARM	BIT(hwmon_in_min_alarm)
148 #define HWMON_I_MAX_ALARM	BIT(hwmon_in_max_alarm)
149 #define HWMON_I_LCRIT_ALARM	BIT(hwmon_in_lcrit_alarm)
150 #define HWMON_I_CRIT_ALARM	BIT(hwmon_in_crit_alarm)
151 
152 enum hwmon_curr_attributes {
153 	hwmon_curr_enable,
154 	hwmon_curr_input,
155 	hwmon_curr_min,
156 	hwmon_curr_max,
157 	hwmon_curr_lcrit,
158 	hwmon_curr_crit,
159 	hwmon_curr_average,
160 	hwmon_curr_lowest,
161 	hwmon_curr_highest,
162 	hwmon_curr_reset_history,
163 	hwmon_curr_label,
164 	hwmon_curr_alarm,
165 	hwmon_curr_min_alarm,
166 	hwmon_curr_max_alarm,
167 	hwmon_curr_lcrit_alarm,
168 	hwmon_curr_crit_alarm,
169 };
170 
171 #define HWMON_C_ENABLE		BIT(hwmon_curr_enable)
172 #define HWMON_C_INPUT		BIT(hwmon_curr_input)
173 #define HWMON_C_MIN		BIT(hwmon_curr_min)
174 #define HWMON_C_MAX		BIT(hwmon_curr_max)
175 #define HWMON_C_LCRIT		BIT(hwmon_curr_lcrit)
176 #define HWMON_C_CRIT		BIT(hwmon_curr_crit)
177 #define HWMON_C_AVERAGE		BIT(hwmon_curr_average)
178 #define HWMON_C_LOWEST		BIT(hwmon_curr_lowest)
179 #define HWMON_C_HIGHEST		BIT(hwmon_curr_highest)
180 #define HWMON_C_RESET_HISTORY	BIT(hwmon_curr_reset_history)
181 #define HWMON_C_LABEL		BIT(hwmon_curr_label)
182 #define HWMON_C_ALARM		BIT(hwmon_curr_alarm)
183 #define HWMON_C_MIN_ALARM	BIT(hwmon_curr_min_alarm)
184 #define HWMON_C_MAX_ALARM	BIT(hwmon_curr_max_alarm)
185 #define HWMON_C_LCRIT_ALARM	BIT(hwmon_curr_lcrit_alarm)
186 #define HWMON_C_CRIT_ALARM	BIT(hwmon_curr_crit_alarm)
187 
188 enum hwmon_power_attributes {
189 	hwmon_power_enable,
190 	hwmon_power_average,
191 	hwmon_power_average_interval,
192 	hwmon_power_average_interval_max,
193 	hwmon_power_average_interval_min,
194 	hwmon_power_average_highest,
195 	hwmon_power_average_lowest,
196 	hwmon_power_average_max,
197 	hwmon_power_average_min,
198 	hwmon_power_input,
199 	hwmon_power_input_highest,
200 	hwmon_power_input_lowest,
201 	hwmon_power_reset_history,
202 	hwmon_power_accuracy,
203 	hwmon_power_cap,
204 	hwmon_power_cap_hyst,
205 	hwmon_power_cap_max,
206 	hwmon_power_cap_min,
207 	hwmon_power_min,
208 	hwmon_power_max,
209 	hwmon_power_crit,
210 	hwmon_power_lcrit,
211 	hwmon_power_label,
212 	hwmon_power_alarm,
213 	hwmon_power_cap_alarm,
214 	hwmon_power_min_alarm,
215 	hwmon_power_max_alarm,
216 	hwmon_power_lcrit_alarm,
217 	hwmon_power_crit_alarm,
218 };
219 
220 #define HWMON_P_ENABLE			BIT(hwmon_power_enable)
221 #define HWMON_P_AVERAGE			BIT(hwmon_power_average)
222 #define HWMON_P_AVERAGE_INTERVAL	BIT(hwmon_power_average_interval)
223 #define HWMON_P_AVERAGE_INTERVAL_MAX	BIT(hwmon_power_average_interval_max)
224 #define HWMON_P_AVERAGE_INTERVAL_MIN	BIT(hwmon_power_average_interval_min)
225 #define HWMON_P_AVERAGE_HIGHEST		BIT(hwmon_power_average_highest)
226 #define HWMON_P_AVERAGE_LOWEST		BIT(hwmon_power_average_lowest)
227 #define HWMON_P_AVERAGE_MAX		BIT(hwmon_power_average_max)
228 #define HWMON_P_AVERAGE_MIN		BIT(hwmon_power_average_min)
229 #define HWMON_P_INPUT			BIT(hwmon_power_input)
230 #define HWMON_P_INPUT_HIGHEST		BIT(hwmon_power_input_highest)
231 #define HWMON_P_INPUT_LOWEST		BIT(hwmon_power_input_lowest)
232 #define HWMON_P_RESET_HISTORY		BIT(hwmon_power_reset_history)
233 #define HWMON_P_ACCURACY		BIT(hwmon_power_accuracy)
234 #define HWMON_P_CAP			BIT(hwmon_power_cap)
235 #define HWMON_P_CAP_HYST		BIT(hwmon_power_cap_hyst)
236 #define HWMON_P_CAP_MAX			BIT(hwmon_power_cap_max)
237 #define HWMON_P_CAP_MIN			BIT(hwmon_power_cap_min)
238 #define HWMON_P_MIN			BIT(hwmon_power_min)
239 #define HWMON_P_MAX			BIT(hwmon_power_max)
240 #define HWMON_P_LCRIT			BIT(hwmon_power_lcrit)
241 #define HWMON_P_CRIT			BIT(hwmon_power_crit)
242 #define HWMON_P_LABEL			BIT(hwmon_power_label)
243 #define HWMON_P_ALARM			BIT(hwmon_power_alarm)
244 #define HWMON_P_CAP_ALARM		BIT(hwmon_power_cap_alarm)
245 #define HWMON_P_MIN_ALARM		BIT(hwmon_power_min_alarm)
246 #define HWMON_P_MAX_ALARM		BIT(hwmon_power_max_alarm)
247 #define HWMON_P_LCRIT_ALARM		BIT(hwmon_power_lcrit_alarm)
248 #define HWMON_P_CRIT_ALARM		BIT(hwmon_power_crit_alarm)
249 
250 enum hwmon_energy_attributes {
251 	hwmon_energy_enable,
252 	hwmon_energy_input,
253 	hwmon_energy_label,
254 };
255 
256 #define HWMON_E_ENABLE			BIT(hwmon_energy_enable)
257 #define HWMON_E_INPUT			BIT(hwmon_energy_input)
258 #define HWMON_E_LABEL			BIT(hwmon_energy_label)
259 
260 enum hwmon_humidity_attributes {
261 	hwmon_humidity_enable,
262 	hwmon_humidity_input,
263 	hwmon_humidity_label,
264 	hwmon_humidity_min,
265 	hwmon_humidity_min_hyst,
266 	hwmon_humidity_max,
267 	hwmon_humidity_max_hyst,
268 	hwmon_humidity_alarm,
269 	hwmon_humidity_fault,
270 };
271 
272 #define HWMON_H_ENABLE			BIT(hwmon_humidity_enable)
273 #define HWMON_H_INPUT			BIT(hwmon_humidity_input)
274 #define HWMON_H_LABEL			BIT(hwmon_humidity_label)
275 #define HWMON_H_MIN			BIT(hwmon_humidity_min)
276 #define HWMON_H_MIN_HYST		BIT(hwmon_humidity_min_hyst)
277 #define HWMON_H_MAX			BIT(hwmon_humidity_max)
278 #define HWMON_H_MAX_HYST		BIT(hwmon_humidity_max_hyst)
279 #define HWMON_H_ALARM			BIT(hwmon_humidity_alarm)
280 #define HWMON_H_FAULT			BIT(hwmon_humidity_fault)
281 
282 enum hwmon_fan_attributes {
283 	hwmon_fan_enable,
284 	hwmon_fan_input,
285 	hwmon_fan_label,
286 	hwmon_fan_min,
287 	hwmon_fan_max,
288 	hwmon_fan_div,
289 	hwmon_fan_pulses,
290 	hwmon_fan_target,
291 	hwmon_fan_alarm,
292 	hwmon_fan_min_alarm,
293 	hwmon_fan_max_alarm,
294 	hwmon_fan_fault,
295 };
296 
297 #define HWMON_F_ENABLE			BIT(hwmon_fan_enable)
298 #define HWMON_F_INPUT			BIT(hwmon_fan_input)
299 #define HWMON_F_LABEL			BIT(hwmon_fan_label)
300 #define HWMON_F_MIN			BIT(hwmon_fan_min)
301 #define HWMON_F_MAX			BIT(hwmon_fan_max)
302 #define HWMON_F_DIV			BIT(hwmon_fan_div)
303 #define HWMON_F_PULSES			BIT(hwmon_fan_pulses)
304 #define HWMON_F_TARGET			BIT(hwmon_fan_target)
305 #define HWMON_F_ALARM			BIT(hwmon_fan_alarm)
306 #define HWMON_F_MIN_ALARM		BIT(hwmon_fan_min_alarm)
307 #define HWMON_F_MAX_ALARM		BIT(hwmon_fan_max_alarm)
308 #define HWMON_F_FAULT			BIT(hwmon_fan_fault)
309 
310 enum hwmon_pwm_attributes {
311 	hwmon_pwm_input,
312 	hwmon_pwm_enable,
313 	hwmon_pwm_mode,
314 	hwmon_pwm_freq,
315 };
316 
317 #define HWMON_PWM_INPUT			BIT(hwmon_pwm_input)
318 #define HWMON_PWM_ENABLE		BIT(hwmon_pwm_enable)
319 #define HWMON_PWM_MODE			BIT(hwmon_pwm_mode)
320 #define HWMON_PWM_FREQ			BIT(hwmon_pwm_freq)
321 
322 enum hwmon_intrusion_attributes {
323 	hwmon_intrusion_alarm,
324 	hwmon_intrusion_beep,
325 };
326 #define HWMON_INTRUSION_ALARM		BIT(hwmon_intrusion_alarm)
327 #define HWMON_INTRUSION_BEEP		BIT(hwmon_intrusion_beep)
328 
329 /**
330  * struct hwmon_ops - hwmon device operations
331  * @is_visible: Callback to return attribute visibility. Mandatory.
332  *		Parameters are:
333  *		@const void *drvdata:
334  *			Pointer to driver-private data structure passed
335  *			as argument to hwmon_device_register_with_info().
336  *		@type:	Sensor type
337  *		@attr:	Sensor attribute
338  *		@channel:
339  *			Channel number
340  *		The function returns the file permissions.
341  *		If the return value is 0, no attribute will be created.
342  * @read:	Read callback for data attributes. Mandatory if readable
343  *		data attributes are present.
344  *		Parameters are:
345  *		@dev:	Pointer to hardware monitoring device
346  *		@type:	Sensor type
347  *		@attr:	Sensor attribute
348  *		@channel:
349  *			Channel number
350  *		@val:	Pointer to returned value
351  *		The function returns 0 on success or a negative error number.
352  * @read_string:
353  *		Read callback for string attributes. Mandatory if string
354  *		attributes are present.
355  *		Parameters are:
356  *		@dev:	Pointer to hardware monitoring device
357  *		@type:	Sensor type
358  *		@attr:	Sensor attribute
359  *		@channel:
360  *			Channel number
361  *		@str:	Pointer to returned string
362  *		The function returns 0 on success or a negative error number.
363  * @write:	Write callback for data attributes. Mandatory if writeable
364  *		data attributes are present.
365  *		Parameters are:
366  *		@dev:	Pointer to hardware monitoring device
367  *		@type:	Sensor type
368  *		@attr:	Sensor attribute
369  *		@channel:
370  *			Channel number
371  *		@val:	Value to write
372  *		The function returns 0 on success or a negative error number.
373  */
374 struct hwmon_ops {
375 	umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
376 			      u32 attr, int channel);
377 	int (*read)(struct device *dev, enum hwmon_sensor_types type,
378 		    u32 attr, int channel, long *val);
379 	int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
380 		    u32 attr, int channel, const char **str);
381 	int (*write)(struct device *dev, enum hwmon_sensor_types type,
382 		     u32 attr, int channel, long val);
383 };
384 
385 /**
386  * Channel information
387  * @type:	Channel type.
388  * @config:	Pointer to NULL-terminated list of channel parameters.
389  *		Use for per-channel attributes.
390  */
391 struct hwmon_channel_info {
392 	enum hwmon_sensor_types type;
393 	const u32 *config;
394 };
395 
396 #define HWMON_CHANNEL_INFO(stype, ...)	\
397 	(&(struct hwmon_channel_info) {	\
398 		.type = hwmon_##stype,	\
399 		.config = (u32 []) {	\
400 			__VA_ARGS__, 0	\
401 		}			\
402 	})
403 
404 /**
405  * Chip configuration
406  * @ops:	Pointer to hwmon operations.
407  * @info:	Null-terminated list of channel information.
408  */
409 struct hwmon_chip_info {
410 	const struct hwmon_ops *ops;
411 	const struct hwmon_channel_info **info;
412 };
413 
414 /* hwmon_device_register() is deprecated */
415 struct device *hwmon_device_register(struct device *dev);
416 
417 struct device *
418 hwmon_device_register_with_groups(struct device *dev, const char *name,
419 				  void *drvdata,
420 				  const struct attribute_group **groups);
421 struct device *
422 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
423 				       void *drvdata,
424 				       const struct attribute_group **groups);
425 struct device *
426 hwmon_device_register_with_info(struct device *dev,
427 				const char *name, void *drvdata,
428 				const struct hwmon_chip_info *info,
429 				const struct attribute_group **extra_groups);
430 struct device *
431 devm_hwmon_device_register_with_info(struct device *dev,
432 				const char *name, void *drvdata,
433 				const struct hwmon_chip_info *info,
434 				const struct attribute_group **extra_groups);
435 
436 void hwmon_device_unregister(struct device *dev);
437 void devm_hwmon_device_unregister(struct device *dev);
438 
439 int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
440 		       u32 attr, int channel);
441 
442 /**
443  * hwmon_is_bad_char - Is the char invalid in a hwmon name
444  * @ch: the char to be considered
445  *
446  * hwmon_is_bad_char() can be used to determine if the given character
447  * may not be used in a hwmon name.
448  *
449  * Returns true if the char is invalid, false otherwise.
450  */
451 static inline bool hwmon_is_bad_char(const char ch)
452 {
453 	switch (ch) {
454 	case '-':
455 	case '*':
456 	case ' ':
457 	case '\t':
458 	case '\n':
459 		return true;
460 	default:
461 		return false;
462 	}
463 }
464 
465 #endif
466