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 hwmon_chip_beep_enable, 48 hwmon_chip_pec, 49 }; 50 51 #define HWMON_C_TEMP_RESET_HISTORY BIT(hwmon_chip_temp_reset_history) 52 #define HWMON_C_IN_RESET_HISTORY BIT(hwmon_chip_in_reset_history) 53 #define HWMON_C_CURR_RESET_HISTORY BIT(hwmon_chip_curr_reset_history) 54 #define HWMON_C_POWER_RESET_HISTORY BIT(hwmon_chip_power_reset_history) 55 #define HWMON_C_REGISTER_TZ BIT(hwmon_chip_register_tz) 56 #define HWMON_C_UPDATE_INTERVAL BIT(hwmon_chip_update_interval) 57 #define HWMON_C_ALARMS BIT(hwmon_chip_alarms) 58 #define HWMON_C_SAMPLES BIT(hwmon_chip_samples) 59 #define HWMON_C_CURR_SAMPLES BIT(hwmon_chip_curr_samples) 60 #define HWMON_C_IN_SAMPLES BIT(hwmon_chip_in_samples) 61 #define HWMON_C_POWER_SAMPLES BIT(hwmon_chip_power_samples) 62 #define HWMON_C_TEMP_SAMPLES BIT(hwmon_chip_temp_samples) 63 #define HWMON_C_BEEP_ENABLE BIT(hwmon_chip_beep_enable) 64 #define HWMON_C_PEC BIT(hwmon_chip_pec) 65 66 enum hwmon_temp_attributes { 67 hwmon_temp_enable, 68 hwmon_temp_input, 69 hwmon_temp_type, 70 hwmon_temp_lcrit, 71 hwmon_temp_lcrit_hyst, 72 hwmon_temp_min, 73 hwmon_temp_min_hyst, 74 hwmon_temp_max, 75 hwmon_temp_max_hyst, 76 hwmon_temp_crit, 77 hwmon_temp_crit_hyst, 78 hwmon_temp_emergency, 79 hwmon_temp_emergency_hyst, 80 hwmon_temp_alarm, 81 hwmon_temp_lcrit_alarm, 82 hwmon_temp_min_alarm, 83 hwmon_temp_max_alarm, 84 hwmon_temp_crit_alarm, 85 hwmon_temp_emergency_alarm, 86 hwmon_temp_fault, 87 hwmon_temp_offset, 88 hwmon_temp_label, 89 hwmon_temp_lowest, 90 hwmon_temp_highest, 91 hwmon_temp_reset_history, 92 hwmon_temp_rated_min, 93 hwmon_temp_rated_max, 94 hwmon_temp_beep, 95 }; 96 97 #define HWMON_T_ENABLE BIT(hwmon_temp_enable) 98 #define HWMON_T_INPUT BIT(hwmon_temp_input) 99 #define HWMON_T_TYPE BIT(hwmon_temp_type) 100 #define HWMON_T_LCRIT BIT(hwmon_temp_lcrit) 101 #define HWMON_T_LCRIT_HYST BIT(hwmon_temp_lcrit_hyst) 102 #define HWMON_T_MIN BIT(hwmon_temp_min) 103 #define HWMON_T_MIN_HYST BIT(hwmon_temp_min_hyst) 104 #define HWMON_T_MAX BIT(hwmon_temp_max) 105 #define HWMON_T_MAX_HYST BIT(hwmon_temp_max_hyst) 106 #define HWMON_T_CRIT BIT(hwmon_temp_crit) 107 #define HWMON_T_CRIT_HYST BIT(hwmon_temp_crit_hyst) 108 #define HWMON_T_EMERGENCY BIT(hwmon_temp_emergency) 109 #define HWMON_T_EMERGENCY_HYST BIT(hwmon_temp_emergency_hyst) 110 #define HWMON_T_ALARM BIT(hwmon_temp_alarm) 111 #define HWMON_T_MIN_ALARM BIT(hwmon_temp_min_alarm) 112 #define HWMON_T_MAX_ALARM BIT(hwmon_temp_max_alarm) 113 #define HWMON_T_CRIT_ALARM BIT(hwmon_temp_crit_alarm) 114 #define HWMON_T_LCRIT_ALARM BIT(hwmon_temp_lcrit_alarm) 115 #define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm) 116 #define HWMON_T_FAULT BIT(hwmon_temp_fault) 117 #define HWMON_T_OFFSET BIT(hwmon_temp_offset) 118 #define HWMON_T_LABEL BIT(hwmon_temp_label) 119 #define HWMON_T_LOWEST BIT(hwmon_temp_lowest) 120 #define HWMON_T_HIGHEST BIT(hwmon_temp_highest) 121 #define HWMON_T_RESET_HISTORY BIT(hwmon_temp_reset_history) 122 #define HWMON_T_RATED_MIN BIT(hwmon_temp_rated_min) 123 #define HWMON_T_RATED_MAX BIT(hwmon_temp_rated_max) 124 #define HWMON_T_BEEP BIT(hwmon_temp_beep) 125 126 enum hwmon_in_attributes { 127 hwmon_in_enable, 128 hwmon_in_input, 129 hwmon_in_min, 130 hwmon_in_max, 131 hwmon_in_lcrit, 132 hwmon_in_crit, 133 hwmon_in_average, 134 hwmon_in_lowest, 135 hwmon_in_highest, 136 hwmon_in_reset_history, 137 hwmon_in_label, 138 hwmon_in_alarm, 139 hwmon_in_min_alarm, 140 hwmon_in_max_alarm, 141 hwmon_in_lcrit_alarm, 142 hwmon_in_crit_alarm, 143 hwmon_in_rated_min, 144 hwmon_in_rated_max, 145 hwmon_in_beep, 146 hwmon_in_fault, 147 }; 148 149 #define HWMON_I_ENABLE BIT(hwmon_in_enable) 150 #define HWMON_I_INPUT BIT(hwmon_in_input) 151 #define HWMON_I_MIN BIT(hwmon_in_min) 152 #define HWMON_I_MAX BIT(hwmon_in_max) 153 #define HWMON_I_LCRIT BIT(hwmon_in_lcrit) 154 #define HWMON_I_CRIT BIT(hwmon_in_crit) 155 #define HWMON_I_AVERAGE BIT(hwmon_in_average) 156 #define HWMON_I_LOWEST BIT(hwmon_in_lowest) 157 #define HWMON_I_HIGHEST BIT(hwmon_in_highest) 158 #define HWMON_I_RESET_HISTORY BIT(hwmon_in_reset_history) 159 #define HWMON_I_LABEL BIT(hwmon_in_label) 160 #define HWMON_I_ALARM BIT(hwmon_in_alarm) 161 #define HWMON_I_MIN_ALARM BIT(hwmon_in_min_alarm) 162 #define HWMON_I_MAX_ALARM BIT(hwmon_in_max_alarm) 163 #define HWMON_I_LCRIT_ALARM BIT(hwmon_in_lcrit_alarm) 164 #define HWMON_I_CRIT_ALARM BIT(hwmon_in_crit_alarm) 165 #define HWMON_I_RATED_MIN BIT(hwmon_in_rated_min) 166 #define HWMON_I_RATED_MAX BIT(hwmon_in_rated_max) 167 #define HWMON_I_BEEP BIT(hwmon_in_beep) 168 #define HWMON_I_FAULT BIT(hwmon_in_fault) 169 170 enum hwmon_curr_attributes { 171 hwmon_curr_enable, 172 hwmon_curr_input, 173 hwmon_curr_min, 174 hwmon_curr_max, 175 hwmon_curr_lcrit, 176 hwmon_curr_crit, 177 hwmon_curr_average, 178 hwmon_curr_lowest, 179 hwmon_curr_highest, 180 hwmon_curr_reset_history, 181 hwmon_curr_label, 182 hwmon_curr_alarm, 183 hwmon_curr_min_alarm, 184 hwmon_curr_max_alarm, 185 hwmon_curr_lcrit_alarm, 186 hwmon_curr_crit_alarm, 187 hwmon_curr_rated_min, 188 hwmon_curr_rated_max, 189 hwmon_curr_beep, 190 }; 191 192 #define HWMON_C_ENABLE BIT(hwmon_curr_enable) 193 #define HWMON_C_INPUT BIT(hwmon_curr_input) 194 #define HWMON_C_MIN BIT(hwmon_curr_min) 195 #define HWMON_C_MAX BIT(hwmon_curr_max) 196 #define HWMON_C_LCRIT BIT(hwmon_curr_lcrit) 197 #define HWMON_C_CRIT BIT(hwmon_curr_crit) 198 #define HWMON_C_AVERAGE BIT(hwmon_curr_average) 199 #define HWMON_C_LOWEST BIT(hwmon_curr_lowest) 200 #define HWMON_C_HIGHEST BIT(hwmon_curr_highest) 201 #define HWMON_C_RESET_HISTORY BIT(hwmon_curr_reset_history) 202 #define HWMON_C_LABEL BIT(hwmon_curr_label) 203 #define HWMON_C_ALARM BIT(hwmon_curr_alarm) 204 #define HWMON_C_MIN_ALARM BIT(hwmon_curr_min_alarm) 205 #define HWMON_C_MAX_ALARM BIT(hwmon_curr_max_alarm) 206 #define HWMON_C_LCRIT_ALARM BIT(hwmon_curr_lcrit_alarm) 207 #define HWMON_C_CRIT_ALARM BIT(hwmon_curr_crit_alarm) 208 #define HWMON_C_RATED_MIN BIT(hwmon_curr_rated_min) 209 #define HWMON_C_RATED_MAX BIT(hwmon_curr_rated_max) 210 #define HWMON_C_BEEP BIT(hwmon_curr_beep) 211 212 enum hwmon_power_attributes { 213 hwmon_power_enable, 214 hwmon_power_average, 215 hwmon_power_average_interval, 216 hwmon_power_average_interval_max, 217 hwmon_power_average_interval_min, 218 hwmon_power_average_highest, 219 hwmon_power_average_lowest, 220 hwmon_power_average_max, 221 hwmon_power_average_min, 222 hwmon_power_input, 223 hwmon_power_input_highest, 224 hwmon_power_input_lowest, 225 hwmon_power_reset_history, 226 hwmon_power_accuracy, 227 hwmon_power_cap, 228 hwmon_power_cap_hyst, 229 hwmon_power_cap_max, 230 hwmon_power_cap_min, 231 hwmon_power_min, 232 hwmon_power_max, 233 hwmon_power_crit, 234 hwmon_power_lcrit, 235 hwmon_power_label, 236 hwmon_power_alarm, 237 hwmon_power_cap_alarm, 238 hwmon_power_min_alarm, 239 hwmon_power_max_alarm, 240 hwmon_power_lcrit_alarm, 241 hwmon_power_crit_alarm, 242 hwmon_power_rated_min, 243 hwmon_power_rated_max, 244 }; 245 246 #define HWMON_P_ENABLE BIT(hwmon_power_enable) 247 #define HWMON_P_AVERAGE BIT(hwmon_power_average) 248 #define HWMON_P_AVERAGE_INTERVAL BIT(hwmon_power_average_interval) 249 #define HWMON_P_AVERAGE_INTERVAL_MAX BIT(hwmon_power_average_interval_max) 250 #define HWMON_P_AVERAGE_INTERVAL_MIN BIT(hwmon_power_average_interval_min) 251 #define HWMON_P_AVERAGE_HIGHEST BIT(hwmon_power_average_highest) 252 #define HWMON_P_AVERAGE_LOWEST BIT(hwmon_power_average_lowest) 253 #define HWMON_P_AVERAGE_MAX BIT(hwmon_power_average_max) 254 #define HWMON_P_AVERAGE_MIN BIT(hwmon_power_average_min) 255 #define HWMON_P_INPUT BIT(hwmon_power_input) 256 #define HWMON_P_INPUT_HIGHEST BIT(hwmon_power_input_highest) 257 #define HWMON_P_INPUT_LOWEST BIT(hwmon_power_input_lowest) 258 #define HWMON_P_RESET_HISTORY BIT(hwmon_power_reset_history) 259 #define HWMON_P_ACCURACY BIT(hwmon_power_accuracy) 260 #define HWMON_P_CAP BIT(hwmon_power_cap) 261 #define HWMON_P_CAP_HYST BIT(hwmon_power_cap_hyst) 262 #define HWMON_P_CAP_MAX BIT(hwmon_power_cap_max) 263 #define HWMON_P_CAP_MIN BIT(hwmon_power_cap_min) 264 #define HWMON_P_MIN BIT(hwmon_power_min) 265 #define HWMON_P_MAX BIT(hwmon_power_max) 266 #define HWMON_P_LCRIT BIT(hwmon_power_lcrit) 267 #define HWMON_P_CRIT BIT(hwmon_power_crit) 268 #define HWMON_P_LABEL BIT(hwmon_power_label) 269 #define HWMON_P_ALARM BIT(hwmon_power_alarm) 270 #define HWMON_P_CAP_ALARM BIT(hwmon_power_cap_alarm) 271 #define HWMON_P_MIN_ALARM BIT(hwmon_power_min_alarm) 272 #define HWMON_P_MAX_ALARM BIT(hwmon_power_max_alarm) 273 #define HWMON_P_LCRIT_ALARM BIT(hwmon_power_lcrit_alarm) 274 #define HWMON_P_CRIT_ALARM BIT(hwmon_power_crit_alarm) 275 #define HWMON_P_RATED_MIN BIT(hwmon_power_rated_min) 276 #define HWMON_P_RATED_MAX BIT(hwmon_power_rated_max) 277 278 enum hwmon_energy_attributes { 279 hwmon_energy_enable, 280 hwmon_energy_input, 281 hwmon_energy_label, 282 }; 283 284 #define HWMON_E_ENABLE BIT(hwmon_energy_enable) 285 #define HWMON_E_INPUT BIT(hwmon_energy_input) 286 #define HWMON_E_LABEL BIT(hwmon_energy_label) 287 288 enum hwmon_humidity_attributes { 289 hwmon_humidity_enable, 290 hwmon_humidity_input, 291 hwmon_humidity_label, 292 hwmon_humidity_min, 293 hwmon_humidity_min_hyst, 294 hwmon_humidity_max, 295 hwmon_humidity_max_hyst, 296 hwmon_humidity_alarm, 297 hwmon_humidity_fault, 298 hwmon_humidity_rated_min, 299 hwmon_humidity_rated_max, 300 hwmon_humidity_min_alarm, 301 hwmon_humidity_max_alarm, 302 }; 303 304 #define HWMON_H_ENABLE BIT(hwmon_humidity_enable) 305 #define HWMON_H_INPUT BIT(hwmon_humidity_input) 306 #define HWMON_H_LABEL BIT(hwmon_humidity_label) 307 #define HWMON_H_MIN BIT(hwmon_humidity_min) 308 #define HWMON_H_MIN_HYST BIT(hwmon_humidity_min_hyst) 309 #define HWMON_H_MAX BIT(hwmon_humidity_max) 310 #define HWMON_H_MAX_HYST BIT(hwmon_humidity_max_hyst) 311 #define HWMON_H_ALARM BIT(hwmon_humidity_alarm) 312 #define HWMON_H_FAULT BIT(hwmon_humidity_fault) 313 #define HWMON_H_RATED_MIN BIT(hwmon_humidity_rated_min) 314 #define HWMON_H_RATED_MAX BIT(hwmon_humidity_rated_max) 315 #define HWMON_H_MIN_ALARM BIT(hwmon_humidity_min_alarm) 316 #define HWMON_H_MAX_ALARM BIT(hwmon_humidity_max_alarm) 317 318 enum hwmon_fan_attributes { 319 hwmon_fan_enable, 320 hwmon_fan_input, 321 hwmon_fan_label, 322 hwmon_fan_min, 323 hwmon_fan_max, 324 hwmon_fan_div, 325 hwmon_fan_pulses, 326 hwmon_fan_target, 327 hwmon_fan_alarm, 328 hwmon_fan_min_alarm, 329 hwmon_fan_max_alarm, 330 hwmon_fan_fault, 331 hwmon_fan_beep, 332 }; 333 334 #define HWMON_F_ENABLE BIT(hwmon_fan_enable) 335 #define HWMON_F_INPUT BIT(hwmon_fan_input) 336 #define HWMON_F_LABEL BIT(hwmon_fan_label) 337 #define HWMON_F_MIN BIT(hwmon_fan_min) 338 #define HWMON_F_MAX BIT(hwmon_fan_max) 339 #define HWMON_F_DIV BIT(hwmon_fan_div) 340 #define HWMON_F_PULSES BIT(hwmon_fan_pulses) 341 #define HWMON_F_TARGET BIT(hwmon_fan_target) 342 #define HWMON_F_ALARM BIT(hwmon_fan_alarm) 343 #define HWMON_F_MIN_ALARM BIT(hwmon_fan_min_alarm) 344 #define HWMON_F_MAX_ALARM BIT(hwmon_fan_max_alarm) 345 #define HWMON_F_FAULT BIT(hwmon_fan_fault) 346 #define HWMON_F_BEEP BIT(hwmon_fan_beep) 347 348 enum hwmon_pwm_attributes { 349 hwmon_pwm_input, 350 hwmon_pwm_enable, 351 hwmon_pwm_mode, 352 hwmon_pwm_freq, 353 hwmon_pwm_auto_channels_temp, 354 }; 355 356 #define HWMON_PWM_INPUT BIT(hwmon_pwm_input) 357 #define HWMON_PWM_ENABLE BIT(hwmon_pwm_enable) 358 #define HWMON_PWM_MODE BIT(hwmon_pwm_mode) 359 #define HWMON_PWM_FREQ BIT(hwmon_pwm_freq) 360 #define HWMON_PWM_AUTO_CHANNELS_TEMP BIT(hwmon_pwm_auto_channels_temp) 361 362 enum hwmon_intrusion_attributes { 363 hwmon_intrusion_alarm, 364 hwmon_intrusion_beep, 365 }; 366 #define HWMON_INTRUSION_ALARM BIT(hwmon_intrusion_alarm) 367 #define HWMON_INTRUSION_BEEP BIT(hwmon_intrusion_beep) 368 369 /** 370 * struct hwmon_ops - hwmon device operations 371 * @is_visible: Callback to return attribute visibility. Mandatory. 372 * Parameters are: 373 * @const void *drvdata: 374 * Pointer to driver-private data structure passed 375 * as argument to hwmon_device_register_with_info(). 376 * @type: Sensor type 377 * @attr: Sensor attribute 378 * @channel: 379 * Channel number 380 * The function returns the file permissions. 381 * If the return value is 0, no attribute will be created. 382 * @read: Read callback for data attributes. Mandatory if readable 383 * data attributes are present. 384 * Parameters are: 385 * @dev: Pointer to hardware monitoring device 386 * @type: Sensor type 387 * @attr: Sensor attribute 388 * @channel: 389 * Channel number 390 * @val: Pointer to returned value 391 * The function returns 0 on success or a negative error number. 392 * @read_string: 393 * Read callback for string attributes. Mandatory if string 394 * attributes are present. 395 * Parameters are: 396 * @dev: Pointer to hardware monitoring device 397 * @type: Sensor type 398 * @attr: Sensor attribute 399 * @channel: 400 * Channel number 401 * @str: Pointer to returned string 402 * The function returns 0 on success or a negative error number. 403 * @write: Write callback for data attributes. Mandatory if writeable 404 * data attributes are present. 405 * Parameters are: 406 * @dev: Pointer to hardware monitoring device 407 * @type: Sensor type 408 * @attr: Sensor attribute 409 * @channel: 410 * Channel number 411 * @val: Value to write 412 * The function returns 0 on success or a negative error number. 413 */ 414 struct hwmon_ops { 415 umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type, 416 u32 attr, int channel); 417 int (*read)(struct device *dev, enum hwmon_sensor_types type, 418 u32 attr, int channel, long *val); 419 int (*read_string)(struct device *dev, enum hwmon_sensor_types type, 420 u32 attr, int channel, const char **str); 421 int (*write)(struct device *dev, enum hwmon_sensor_types type, 422 u32 attr, int channel, long val); 423 }; 424 425 /** 426 * struct hwmon_channel_info - Channel information 427 * @type: Channel type. 428 * @config: Pointer to NULL-terminated list of channel parameters. 429 * Use for per-channel attributes. 430 */ 431 struct hwmon_channel_info { 432 enum hwmon_sensor_types type; 433 const u32 *config; 434 }; 435 436 #define HWMON_CHANNEL_INFO(stype, ...) \ 437 (&(const struct hwmon_channel_info) { \ 438 .type = hwmon_##stype, \ 439 .config = (const u32 []) { \ 440 __VA_ARGS__, 0 \ 441 } \ 442 }) 443 444 /** 445 * struct hwmon_chip_info - Chip configuration 446 * @ops: Pointer to hwmon operations. 447 * @info: Null-terminated list of channel information. 448 */ 449 struct hwmon_chip_info { 450 const struct hwmon_ops *ops; 451 const struct hwmon_channel_info * const *info; 452 }; 453 454 /* hwmon_device_register() is deprecated */ 455 struct device *hwmon_device_register(struct device *dev); 456 457 /* 458 * hwmon_device_register_with_groups() and 459 * devm_hwmon_device_register_with_groups() are deprecated. 460 */ 461 struct device * 462 hwmon_device_register_with_groups(struct device *dev, const char *name, 463 void *drvdata, 464 const struct attribute_group **groups); 465 struct device * 466 devm_hwmon_device_register_with_groups(struct device *dev, const char *name, 467 void *drvdata, 468 const struct attribute_group **groups); 469 struct device * 470 hwmon_device_register_with_info(struct device *dev, 471 const char *name, void *drvdata, 472 const struct hwmon_chip_info *info, 473 const struct attribute_group **extra_groups); 474 struct device * 475 hwmon_device_register_for_thermal(struct device *dev, const char *name, 476 void *drvdata); 477 struct device * 478 devm_hwmon_device_register_with_info(struct device *dev, 479 const char *name, void *drvdata, 480 const struct hwmon_chip_info *info, 481 const struct attribute_group **extra_groups); 482 483 void hwmon_device_unregister(struct device *dev); 484 485 int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, 486 u32 attr, int channel); 487 488 char *hwmon_sanitize_name(const char *name); 489 char *devm_hwmon_sanitize_name(struct device *dev, const char *name); 490 491 /** 492 * hwmon_is_bad_char - Is the char invalid in a hwmon name 493 * @ch: the char to be considered 494 * 495 * hwmon_is_bad_char() can be used to determine if the given character 496 * may not be used in a hwmon name. 497 * 498 * Returns true if the char is invalid, false otherwise. 499 */ 500 static inline bool hwmon_is_bad_char(const char ch) 501 { 502 switch (ch) { 503 case '-': 504 case '*': 505 case ' ': 506 case '\t': 507 case '\n': 508 return true; 509 default: 510 return false; 511 } 512 } 513 514 #endif 515