1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring |
4 | * |
5 | * This file defines the sysfs class "hwmon", for use by sensors drivers. |
6 | * |
7 | * Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com> |
8 | */ |
9 | |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | |
12 | #include <linux/bitops.h> |
13 | #include <linux/device.h> |
14 | #include <linux/err.h> |
15 | #include <linux/gfp.h> |
16 | #include <linux/hwmon.h> |
17 | #include <linux/idr.h> |
18 | #include <linux/kstrtox.h> |
19 | #include <linux/list.h> |
20 | #include <linux/module.h> |
21 | #include <linux/pci.h> |
22 | #include <linux/property.h> |
23 | #include <linux/slab.h> |
24 | #include <linux/string.h> |
25 | #include <linux/thermal.h> |
26 | |
27 | #define CREATE_TRACE_POINTS |
28 | #include <trace/events/hwmon.h> |
29 | |
30 | #define HWMON_ID_PREFIX "hwmon" |
31 | #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" |
32 | |
33 | struct hwmon_device { |
34 | const char *name; |
35 | const char *label; |
36 | struct device dev; |
37 | const struct hwmon_chip_info *chip; |
38 | struct list_head tzdata; |
39 | struct attribute_group group; |
40 | const struct attribute_group **groups; |
41 | }; |
42 | |
43 | #define to_hwmon_device(d) container_of(d, struct hwmon_device, dev) |
44 | |
45 | #define MAX_SYSFS_ATTR_NAME_LENGTH 32 |
46 | |
47 | struct hwmon_device_attribute { |
48 | struct device_attribute dev_attr; |
49 | const struct hwmon_ops *ops; |
50 | enum hwmon_sensor_types type; |
51 | u32 attr; |
52 | int index; |
53 | char name[MAX_SYSFS_ATTR_NAME_LENGTH]; |
54 | }; |
55 | |
56 | #define to_hwmon_attr(d) \ |
57 | container_of(d, struct hwmon_device_attribute, dev_attr) |
58 | #define to_dev_attr(a) container_of(a, struct device_attribute, attr) |
59 | |
60 | /* |
61 | * Thermal zone information |
62 | */ |
63 | struct hwmon_thermal_data { |
64 | struct list_head node; /* hwmon tzdata list entry */ |
65 | struct device *dev; /* Reference to hwmon device */ |
66 | int index; /* sensor index */ |
67 | struct thermal_zone_device *tzd;/* thermal zone device */ |
68 | }; |
69 | |
70 | static ssize_t |
71 | name_show(struct device *dev, struct device_attribute *attr, char *buf) |
72 | { |
73 | return sprintf(buf, fmt: "%s\n" , to_hwmon_device(dev)->name); |
74 | } |
75 | static DEVICE_ATTR_RO(name); |
76 | |
77 | static ssize_t |
78 | label_show(struct device *dev, struct device_attribute *attr, char *buf) |
79 | { |
80 | return sysfs_emit(buf, fmt: "%s\n" , to_hwmon_device(dev)->label); |
81 | } |
82 | static DEVICE_ATTR_RO(label); |
83 | |
84 | static struct attribute *hwmon_dev_attrs[] = { |
85 | &dev_attr_name.attr, |
86 | &dev_attr_label.attr, |
87 | NULL |
88 | }; |
89 | |
90 | static umode_t hwmon_dev_attr_is_visible(struct kobject *kobj, |
91 | struct attribute *attr, int n) |
92 | { |
93 | struct device *dev = kobj_to_dev(kobj); |
94 | struct hwmon_device *hdev = to_hwmon_device(dev); |
95 | |
96 | if (attr == &dev_attr_name.attr && hdev->name == NULL) |
97 | return 0; |
98 | |
99 | if (attr == &dev_attr_label.attr && hdev->label == NULL) |
100 | return 0; |
101 | |
102 | return attr->mode; |
103 | } |
104 | |
105 | static const struct attribute_group hwmon_dev_attr_group = { |
106 | .attrs = hwmon_dev_attrs, |
107 | .is_visible = hwmon_dev_attr_is_visible, |
108 | }; |
109 | |
110 | static const struct attribute_group *hwmon_dev_attr_groups[] = { |
111 | &hwmon_dev_attr_group, |
112 | NULL |
113 | }; |
114 | |
115 | static void hwmon_free_attrs(struct attribute **attrs) |
116 | { |
117 | int i; |
118 | |
119 | for (i = 0; attrs[i]; i++) { |
120 | struct device_attribute *dattr = to_dev_attr(attrs[i]); |
121 | struct hwmon_device_attribute *hattr = to_hwmon_attr(dattr); |
122 | |
123 | kfree(objp: hattr); |
124 | } |
125 | kfree(objp: attrs); |
126 | } |
127 | |
128 | static void hwmon_dev_release(struct device *dev) |
129 | { |
130 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
131 | |
132 | if (hwdev->group.attrs) |
133 | hwmon_free_attrs(attrs: hwdev->group.attrs); |
134 | kfree(objp: hwdev->groups); |
135 | kfree(objp: hwdev->label); |
136 | kfree(objp: hwdev); |
137 | } |
138 | |
139 | static struct class hwmon_class = { |
140 | .name = "hwmon" , |
141 | .dev_groups = hwmon_dev_attr_groups, |
142 | .dev_release = hwmon_dev_release, |
143 | }; |
144 | |
145 | static DEFINE_IDA(hwmon_ida); |
146 | |
147 | /* Thermal zone handling */ |
148 | |
149 | /* |
150 | * The complex conditional is necessary to avoid a cyclic dependency |
151 | * between hwmon and thermal_sys modules. |
152 | */ |
153 | #ifdef CONFIG_THERMAL_OF |
154 | static int hwmon_thermal_get_temp(struct thermal_zone_device *tz, int *temp) |
155 | { |
156 | struct hwmon_thermal_data *tdata = thermal_zone_device_priv(tzd: tz); |
157 | struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); |
158 | int ret; |
159 | long t; |
160 | |
161 | ret = hwdev->chip->ops->read(tdata->dev, hwmon_temp, hwmon_temp_input, |
162 | tdata->index, &t); |
163 | if (ret < 0) |
164 | return ret; |
165 | |
166 | *temp = t; |
167 | |
168 | return 0; |
169 | } |
170 | |
171 | static int hwmon_thermal_set_trips(struct thermal_zone_device *tz, int low, int high) |
172 | { |
173 | struct hwmon_thermal_data *tdata = thermal_zone_device_priv(tzd: tz); |
174 | struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); |
175 | const struct hwmon_chip_info *chip = hwdev->chip; |
176 | const struct hwmon_channel_info * const *info = chip->info; |
177 | unsigned int i; |
178 | int err; |
179 | |
180 | if (!chip->ops->write) |
181 | return 0; |
182 | |
183 | for (i = 0; info[i] && info[i]->type != hwmon_temp; i++) |
184 | continue; |
185 | |
186 | if (!info[i]) |
187 | return 0; |
188 | |
189 | if (info[i]->config[tdata->index] & HWMON_T_MIN) { |
190 | err = chip->ops->write(tdata->dev, hwmon_temp, |
191 | hwmon_temp_min, tdata->index, low); |
192 | if (err && err != -EOPNOTSUPP) |
193 | return err; |
194 | } |
195 | |
196 | if (info[i]->config[tdata->index] & HWMON_T_MAX) { |
197 | err = chip->ops->write(tdata->dev, hwmon_temp, |
198 | hwmon_temp_max, tdata->index, high); |
199 | if (err && err != -EOPNOTSUPP) |
200 | return err; |
201 | } |
202 | |
203 | return 0; |
204 | } |
205 | |
206 | static const struct thermal_zone_device_ops hwmon_thermal_ops = { |
207 | .get_temp = hwmon_thermal_get_temp, |
208 | .set_trips = hwmon_thermal_set_trips, |
209 | }; |
210 | |
211 | static void hwmon_thermal_remove_sensor(void *data) |
212 | { |
213 | list_del(entry: data); |
214 | } |
215 | |
216 | static int hwmon_thermal_add_sensor(struct device *dev, int index) |
217 | { |
218 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
219 | struct hwmon_thermal_data *tdata; |
220 | struct thermal_zone_device *tzd; |
221 | int err; |
222 | |
223 | tdata = devm_kzalloc(dev, size: sizeof(*tdata), GFP_KERNEL); |
224 | if (!tdata) |
225 | return -ENOMEM; |
226 | |
227 | tdata->dev = dev; |
228 | tdata->index = index; |
229 | |
230 | tzd = devm_thermal_of_zone_register(dev, id: index, data: tdata, |
231 | ops: &hwmon_thermal_ops); |
232 | if (IS_ERR(ptr: tzd)) { |
233 | if (PTR_ERR(ptr: tzd) != -ENODEV) |
234 | return PTR_ERR(ptr: tzd); |
235 | dev_info(dev, "temp%d_input not attached to any thermal zone\n" , |
236 | index + 1); |
237 | devm_kfree(dev, p: tdata); |
238 | return 0; |
239 | } |
240 | |
241 | err = devm_add_action(dev, hwmon_thermal_remove_sensor, &tdata->node); |
242 | if (err) |
243 | return err; |
244 | |
245 | tdata->tzd = tzd; |
246 | list_add(new: &tdata->node, head: &hwdev->tzdata); |
247 | |
248 | return 0; |
249 | } |
250 | |
251 | static int hwmon_thermal_register_sensors(struct device *dev) |
252 | { |
253 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
254 | const struct hwmon_chip_info *chip = hwdev->chip; |
255 | const struct hwmon_channel_info * const *info = chip->info; |
256 | void *drvdata = dev_get_drvdata(dev); |
257 | int i; |
258 | |
259 | for (i = 1; info[i]; i++) { |
260 | int j; |
261 | |
262 | if (info[i]->type != hwmon_temp) |
263 | continue; |
264 | |
265 | for (j = 0; info[i]->config[j]; j++) { |
266 | int err; |
267 | |
268 | if (!(info[i]->config[j] & HWMON_T_INPUT) || |
269 | !chip->ops->is_visible(drvdata, hwmon_temp, |
270 | hwmon_temp_input, j)) |
271 | continue; |
272 | |
273 | err = hwmon_thermal_add_sensor(dev, index: j); |
274 | if (err) |
275 | return err; |
276 | } |
277 | } |
278 | |
279 | return 0; |
280 | } |
281 | |
282 | static void hwmon_thermal_notify(struct device *dev, int index) |
283 | { |
284 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
285 | struct hwmon_thermal_data *tzdata; |
286 | |
287 | list_for_each_entry(tzdata, &hwdev->tzdata, node) { |
288 | if (tzdata->index == index) { |
289 | thermal_zone_device_update(tzdata->tzd, |
290 | THERMAL_EVENT_UNSPECIFIED); |
291 | } |
292 | } |
293 | } |
294 | |
295 | #else |
296 | static int hwmon_thermal_register_sensors(struct device *dev) |
297 | { |
298 | return 0; |
299 | } |
300 | |
301 | static void hwmon_thermal_notify(struct device *dev, int index) { } |
302 | |
303 | #endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */ |
304 | |
305 | static int hwmon_attr_base(enum hwmon_sensor_types type) |
306 | { |
307 | if (type == hwmon_in || type == hwmon_intrusion) |
308 | return 0; |
309 | return 1; |
310 | } |
311 | |
312 | /* sysfs attribute management */ |
313 | |
314 | static ssize_t hwmon_attr_show(struct device *dev, |
315 | struct device_attribute *devattr, char *buf) |
316 | { |
317 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
318 | long val; |
319 | int ret; |
320 | |
321 | ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index, |
322 | &val); |
323 | if (ret < 0) |
324 | return ret; |
325 | |
326 | trace_hwmon_attr_show(index: hattr->index + hwmon_attr_base(type: hattr->type), |
327 | attr_name: hattr->name, val); |
328 | |
329 | return sprintf(buf, fmt: "%ld\n" , val); |
330 | } |
331 | |
332 | static ssize_t hwmon_attr_show_string(struct device *dev, |
333 | struct device_attribute *devattr, |
334 | char *buf) |
335 | { |
336 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
337 | enum hwmon_sensor_types type = hattr->type; |
338 | const char *s; |
339 | int ret; |
340 | |
341 | ret = hattr->ops->read_string(dev, hattr->type, hattr->attr, |
342 | hattr->index, &s); |
343 | if (ret < 0) |
344 | return ret; |
345 | |
346 | trace_hwmon_attr_show_string(index: hattr->index + hwmon_attr_base(type), |
347 | attr_name: hattr->name, s); |
348 | |
349 | return sprintf(buf, fmt: "%s\n" , s); |
350 | } |
351 | |
352 | static ssize_t hwmon_attr_store(struct device *dev, |
353 | struct device_attribute *devattr, |
354 | const char *buf, size_t count) |
355 | { |
356 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
357 | long val; |
358 | int ret; |
359 | |
360 | ret = kstrtol(s: buf, base: 10, res: &val); |
361 | if (ret < 0) |
362 | return ret; |
363 | |
364 | ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index, |
365 | val); |
366 | if (ret < 0) |
367 | return ret; |
368 | |
369 | trace_hwmon_attr_store(index: hattr->index + hwmon_attr_base(type: hattr->type), |
370 | attr_name: hattr->name, val); |
371 | |
372 | return count; |
373 | } |
374 | |
375 | static bool is_string_attr(enum hwmon_sensor_types type, u32 attr) |
376 | { |
377 | return (type == hwmon_temp && attr == hwmon_temp_label) || |
378 | (type == hwmon_in && attr == hwmon_in_label) || |
379 | (type == hwmon_curr && attr == hwmon_curr_label) || |
380 | (type == hwmon_power && attr == hwmon_power_label) || |
381 | (type == hwmon_energy && attr == hwmon_energy_label) || |
382 | (type == hwmon_humidity && attr == hwmon_humidity_label) || |
383 | (type == hwmon_fan && attr == hwmon_fan_label); |
384 | } |
385 | |
386 | static struct attribute *hwmon_genattr(const void *drvdata, |
387 | enum hwmon_sensor_types type, |
388 | u32 attr, |
389 | int index, |
390 | const char *template, |
391 | const struct hwmon_ops *ops) |
392 | { |
393 | struct hwmon_device_attribute *hattr; |
394 | struct device_attribute *dattr; |
395 | struct attribute *a; |
396 | umode_t mode; |
397 | const char *name; |
398 | bool is_string = is_string_attr(type, attr); |
399 | |
400 | /* The attribute is invisible if there is no template string */ |
401 | if (!template) |
402 | return ERR_PTR(error: -ENOENT); |
403 | |
404 | mode = ops->is_visible(drvdata, type, attr, index); |
405 | if (!mode) |
406 | return ERR_PTR(error: -ENOENT); |
407 | |
408 | if ((mode & 0444) && ((is_string && !ops->read_string) || |
409 | (!is_string && !ops->read))) |
410 | return ERR_PTR(error: -EINVAL); |
411 | if ((mode & 0222) && !ops->write) |
412 | return ERR_PTR(error: -EINVAL); |
413 | |
414 | hattr = kzalloc(size: sizeof(*hattr), GFP_KERNEL); |
415 | if (!hattr) |
416 | return ERR_PTR(error: -ENOMEM); |
417 | |
418 | if (type == hwmon_chip) { |
419 | name = template; |
420 | } else { |
421 | scnprintf(buf: hattr->name, size: sizeof(hattr->name), fmt: template, |
422 | index + hwmon_attr_base(type)); |
423 | name = hattr->name; |
424 | } |
425 | |
426 | hattr->type = type; |
427 | hattr->attr = attr; |
428 | hattr->index = index; |
429 | hattr->ops = ops; |
430 | |
431 | dattr = &hattr->dev_attr; |
432 | dattr->show = is_string ? hwmon_attr_show_string : hwmon_attr_show; |
433 | dattr->store = hwmon_attr_store; |
434 | |
435 | a = &dattr->attr; |
436 | sysfs_attr_init(a); |
437 | a->name = name; |
438 | a->mode = mode; |
439 | |
440 | return a; |
441 | } |
442 | |
443 | /* |
444 | * Chip attributes are not attribute templates but actual sysfs attributes. |
445 | * See hwmon_genattr() for special handling. |
446 | */ |
447 | static const char * const hwmon_chip_attrs[] = { |
448 | [hwmon_chip_temp_reset_history] = "temp_reset_history" , |
449 | [hwmon_chip_in_reset_history] = "in_reset_history" , |
450 | [hwmon_chip_curr_reset_history] = "curr_reset_history" , |
451 | [hwmon_chip_power_reset_history] = "power_reset_history" , |
452 | [hwmon_chip_update_interval] = "update_interval" , |
453 | [hwmon_chip_alarms] = "alarms" , |
454 | [hwmon_chip_samples] = "samples" , |
455 | [hwmon_chip_curr_samples] = "curr_samples" , |
456 | [hwmon_chip_in_samples] = "in_samples" , |
457 | [hwmon_chip_power_samples] = "power_samples" , |
458 | [hwmon_chip_temp_samples] = "temp_samples" , |
459 | [hwmon_chip_beep_enable] = "beep_enable" , |
460 | }; |
461 | |
462 | static const char * const hwmon_temp_attr_templates[] = { |
463 | [hwmon_temp_enable] = "temp%d_enable" , |
464 | [hwmon_temp_input] = "temp%d_input" , |
465 | [hwmon_temp_type] = "temp%d_type" , |
466 | [hwmon_temp_lcrit] = "temp%d_lcrit" , |
467 | [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst" , |
468 | [hwmon_temp_min] = "temp%d_min" , |
469 | [hwmon_temp_min_hyst] = "temp%d_min_hyst" , |
470 | [hwmon_temp_max] = "temp%d_max" , |
471 | [hwmon_temp_max_hyst] = "temp%d_max_hyst" , |
472 | [hwmon_temp_crit] = "temp%d_crit" , |
473 | [hwmon_temp_crit_hyst] = "temp%d_crit_hyst" , |
474 | [hwmon_temp_emergency] = "temp%d_emergency" , |
475 | [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst" , |
476 | [hwmon_temp_alarm] = "temp%d_alarm" , |
477 | [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm" , |
478 | [hwmon_temp_min_alarm] = "temp%d_min_alarm" , |
479 | [hwmon_temp_max_alarm] = "temp%d_max_alarm" , |
480 | [hwmon_temp_crit_alarm] = "temp%d_crit_alarm" , |
481 | [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm" , |
482 | [hwmon_temp_fault] = "temp%d_fault" , |
483 | [hwmon_temp_offset] = "temp%d_offset" , |
484 | [hwmon_temp_label] = "temp%d_label" , |
485 | [hwmon_temp_lowest] = "temp%d_lowest" , |
486 | [hwmon_temp_highest] = "temp%d_highest" , |
487 | [hwmon_temp_reset_history] = "temp%d_reset_history" , |
488 | [hwmon_temp_rated_min] = "temp%d_rated_min" , |
489 | [hwmon_temp_rated_max] = "temp%d_rated_max" , |
490 | [hwmon_temp_beep] = "temp%d_beep" , |
491 | }; |
492 | |
493 | static const char * const hwmon_in_attr_templates[] = { |
494 | [hwmon_in_enable] = "in%d_enable" , |
495 | [hwmon_in_input] = "in%d_input" , |
496 | [hwmon_in_min] = "in%d_min" , |
497 | [hwmon_in_max] = "in%d_max" , |
498 | [hwmon_in_lcrit] = "in%d_lcrit" , |
499 | [hwmon_in_crit] = "in%d_crit" , |
500 | [hwmon_in_average] = "in%d_average" , |
501 | [hwmon_in_lowest] = "in%d_lowest" , |
502 | [hwmon_in_highest] = "in%d_highest" , |
503 | [hwmon_in_reset_history] = "in%d_reset_history" , |
504 | [hwmon_in_label] = "in%d_label" , |
505 | [hwmon_in_alarm] = "in%d_alarm" , |
506 | [hwmon_in_min_alarm] = "in%d_min_alarm" , |
507 | [hwmon_in_max_alarm] = "in%d_max_alarm" , |
508 | [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm" , |
509 | [hwmon_in_crit_alarm] = "in%d_crit_alarm" , |
510 | [hwmon_in_rated_min] = "in%d_rated_min" , |
511 | [hwmon_in_rated_max] = "in%d_rated_max" , |
512 | [hwmon_in_beep] = "in%d_beep" , |
513 | }; |
514 | |
515 | static const char * const hwmon_curr_attr_templates[] = { |
516 | [hwmon_curr_enable] = "curr%d_enable" , |
517 | [hwmon_curr_input] = "curr%d_input" , |
518 | [hwmon_curr_min] = "curr%d_min" , |
519 | [hwmon_curr_max] = "curr%d_max" , |
520 | [hwmon_curr_lcrit] = "curr%d_lcrit" , |
521 | [hwmon_curr_crit] = "curr%d_crit" , |
522 | [hwmon_curr_average] = "curr%d_average" , |
523 | [hwmon_curr_lowest] = "curr%d_lowest" , |
524 | [hwmon_curr_highest] = "curr%d_highest" , |
525 | [hwmon_curr_reset_history] = "curr%d_reset_history" , |
526 | [hwmon_curr_label] = "curr%d_label" , |
527 | [hwmon_curr_alarm] = "curr%d_alarm" , |
528 | [hwmon_curr_min_alarm] = "curr%d_min_alarm" , |
529 | [hwmon_curr_max_alarm] = "curr%d_max_alarm" , |
530 | [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm" , |
531 | [hwmon_curr_crit_alarm] = "curr%d_crit_alarm" , |
532 | [hwmon_curr_rated_min] = "curr%d_rated_min" , |
533 | [hwmon_curr_rated_max] = "curr%d_rated_max" , |
534 | [hwmon_curr_beep] = "curr%d_beep" , |
535 | }; |
536 | |
537 | static const char * const hwmon_power_attr_templates[] = { |
538 | [hwmon_power_enable] = "power%d_enable" , |
539 | [hwmon_power_average] = "power%d_average" , |
540 | [hwmon_power_average_interval] = "power%d_average_interval" , |
541 | [hwmon_power_average_interval_max] = "power%d_interval_max" , |
542 | [hwmon_power_average_interval_min] = "power%d_interval_min" , |
543 | [hwmon_power_average_highest] = "power%d_average_highest" , |
544 | [hwmon_power_average_lowest] = "power%d_average_lowest" , |
545 | [hwmon_power_average_max] = "power%d_average_max" , |
546 | [hwmon_power_average_min] = "power%d_average_min" , |
547 | [hwmon_power_input] = "power%d_input" , |
548 | [hwmon_power_input_highest] = "power%d_input_highest" , |
549 | [hwmon_power_input_lowest] = "power%d_input_lowest" , |
550 | [hwmon_power_reset_history] = "power%d_reset_history" , |
551 | [hwmon_power_accuracy] = "power%d_accuracy" , |
552 | [hwmon_power_cap] = "power%d_cap" , |
553 | [hwmon_power_cap_hyst] = "power%d_cap_hyst" , |
554 | [hwmon_power_cap_max] = "power%d_cap_max" , |
555 | [hwmon_power_cap_min] = "power%d_cap_min" , |
556 | [hwmon_power_min] = "power%d_min" , |
557 | [hwmon_power_max] = "power%d_max" , |
558 | [hwmon_power_lcrit] = "power%d_lcrit" , |
559 | [hwmon_power_crit] = "power%d_crit" , |
560 | [hwmon_power_label] = "power%d_label" , |
561 | [hwmon_power_alarm] = "power%d_alarm" , |
562 | [hwmon_power_cap_alarm] = "power%d_cap_alarm" , |
563 | [hwmon_power_min_alarm] = "power%d_min_alarm" , |
564 | [hwmon_power_max_alarm] = "power%d_max_alarm" , |
565 | [hwmon_power_lcrit_alarm] = "power%d_lcrit_alarm" , |
566 | [hwmon_power_crit_alarm] = "power%d_crit_alarm" , |
567 | [hwmon_power_rated_min] = "power%d_rated_min" , |
568 | [hwmon_power_rated_max] = "power%d_rated_max" , |
569 | }; |
570 | |
571 | static const char * const hwmon_energy_attr_templates[] = { |
572 | [hwmon_energy_enable] = "energy%d_enable" , |
573 | [hwmon_energy_input] = "energy%d_input" , |
574 | [hwmon_energy_label] = "energy%d_label" , |
575 | }; |
576 | |
577 | static const char * const hwmon_humidity_attr_templates[] = { |
578 | [hwmon_humidity_enable] = "humidity%d_enable" , |
579 | [hwmon_humidity_input] = "humidity%d_input" , |
580 | [hwmon_humidity_label] = "humidity%d_label" , |
581 | [hwmon_humidity_min] = "humidity%d_min" , |
582 | [hwmon_humidity_min_hyst] = "humidity%d_min_hyst" , |
583 | [hwmon_humidity_max] = "humidity%d_max" , |
584 | [hwmon_humidity_max_hyst] = "humidity%d_max_hyst" , |
585 | [hwmon_humidity_alarm] = "humidity%d_alarm" , |
586 | [hwmon_humidity_fault] = "humidity%d_fault" , |
587 | [hwmon_humidity_rated_min] = "humidity%d_rated_min" , |
588 | [hwmon_humidity_rated_max] = "humidity%d_rated_max" , |
589 | }; |
590 | |
591 | static const char * const hwmon_fan_attr_templates[] = { |
592 | [hwmon_fan_enable] = "fan%d_enable" , |
593 | [hwmon_fan_input] = "fan%d_input" , |
594 | [hwmon_fan_label] = "fan%d_label" , |
595 | [hwmon_fan_min] = "fan%d_min" , |
596 | [hwmon_fan_max] = "fan%d_max" , |
597 | [hwmon_fan_div] = "fan%d_div" , |
598 | [hwmon_fan_pulses] = "fan%d_pulses" , |
599 | [hwmon_fan_target] = "fan%d_target" , |
600 | [hwmon_fan_alarm] = "fan%d_alarm" , |
601 | [hwmon_fan_min_alarm] = "fan%d_min_alarm" , |
602 | [hwmon_fan_max_alarm] = "fan%d_max_alarm" , |
603 | [hwmon_fan_fault] = "fan%d_fault" , |
604 | [hwmon_fan_beep] = "fan%d_beep" , |
605 | }; |
606 | |
607 | static const char * const hwmon_pwm_attr_templates[] = { |
608 | [hwmon_pwm_input] = "pwm%d" , |
609 | [hwmon_pwm_enable] = "pwm%d_enable" , |
610 | [hwmon_pwm_mode] = "pwm%d_mode" , |
611 | [hwmon_pwm_freq] = "pwm%d_freq" , |
612 | [hwmon_pwm_auto_channels_temp] = "pwm%d_auto_channels_temp" , |
613 | }; |
614 | |
615 | static const char * const hwmon_intrusion_attr_templates[] = { |
616 | [hwmon_intrusion_alarm] = "intrusion%d_alarm" , |
617 | [hwmon_intrusion_beep] = "intrusion%d_beep" , |
618 | }; |
619 | |
620 | static const char * const *__templates[] = { |
621 | [hwmon_chip] = hwmon_chip_attrs, |
622 | [hwmon_temp] = hwmon_temp_attr_templates, |
623 | [hwmon_in] = hwmon_in_attr_templates, |
624 | [hwmon_curr] = hwmon_curr_attr_templates, |
625 | [hwmon_power] = hwmon_power_attr_templates, |
626 | [hwmon_energy] = hwmon_energy_attr_templates, |
627 | [hwmon_humidity] = hwmon_humidity_attr_templates, |
628 | [hwmon_fan] = hwmon_fan_attr_templates, |
629 | [hwmon_pwm] = hwmon_pwm_attr_templates, |
630 | [hwmon_intrusion] = hwmon_intrusion_attr_templates, |
631 | }; |
632 | |
633 | static const int __templates_size[] = { |
634 | [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attrs), |
635 | [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates), |
636 | [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates), |
637 | [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates), |
638 | [hwmon_power] = ARRAY_SIZE(hwmon_power_attr_templates), |
639 | [hwmon_energy] = ARRAY_SIZE(hwmon_energy_attr_templates), |
640 | [hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates), |
641 | [hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates), |
642 | [hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates), |
643 | [hwmon_intrusion] = ARRAY_SIZE(hwmon_intrusion_attr_templates), |
644 | }; |
645 | |
646 | int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, |
647 | u32 attr, int channel) |
648 | { |
649 | char event[MAX_SYSFS_ATTR_NAME_LENGTH + 5]; |
650 | char sattr[MAX_SYSFS_ATTR_NAME_LENGTH]; |
651 | char *envp[] = { event, NULL }; |
652 | const char * const *templates; |
653 | const char *template; |
654 | int base; |
655 | |
656 | if (type >= ARRAY_SIZE(__templates)) |
657 | return -EINVAL; |
658 | if (attr >= __templates_size[type]) |
659 | return -EINVAL; |
660 | |
661 | templates = __templates[type]; |
662 | template = templates[attr]; |
663 | |
664 | base = hwmon_attr_base(type); |
665 | |
666 | scnprintf(buf: sattr, MAX_SYSFS_ATTR_NAME_LENGTH, fmt: template, base + channel); |
667 | scnprintf(buf: event, size: sizeof(event), fmt: "NAME=%s" , sattr); |
668 | sysfs_notify(kobj: &dev->kobj, NULL, attr: sattr); |
669 | kobject_uevent_env(kobj: &dev->kobj, action: KOBJ_CHANGE, envp); |
670 | |
671 | if (type == hwmon_temp) |
672 | hwmon_thermal_notify(dev, index: channel); |
673 | |
674 | return 0; |
675 | } |
676 | EXPORT_SYMBOL_GPL(hwmon_notify_event); |
677 | |
678 | static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info) |
679 | { |
680 | int i, n; |
681 | |
682 | for (i = n = 0; info->config[i]; i++) |
683 | n += hweight32(info->config[i]); |
684 | |
685 | return n; |
686 | } |
687 | |
688 | static int hwmon_genattrs(const void *drvdata, |
689 | struct attribute **attrs, |
690 | const struct hwmon_ops *ops, |
691 | const struct hwmon_channel_info *info) |
692 | { |
693 | const char * const *templates; |
694 | int template_size; |
695 | int i, aindex = 0; |
696 | |
697 | if (info->type >= ARRAY_SIZE(__templates)) |
698 | return -EINVAL; |
699 | |
700 | templates = __templates[info->type]; |
701 | template_size = __templates_size[info->type]; |
702 | |
703 | for (i = 0; info->config[i]; i++) { |
704 | u32 attr_mask = info->config[i]; |
705 | u32 attr; |
706 | |
707 | while (attr_mask) { |
708 | struct attribute *a; |
709 | |
710 | attr = __ffs(attr_mask); |
711 | attr_mask &= ~BIT(attr); |
712 | if (attr >= template_size) |
713 | return -EINVAL; |
714 | a = hwmon_genattr(drvdata, type: info->type, attr, index: i, |
715 | template: templates[attr], ops); |
716 | if (IS_ERR(ptr: a)) { |
717 | if (PTR_ERR(ptr: a) != -ENOENT) |
718 | return PTR_ERR(ptr: a); |
719 | continue; |
720 | } |
721 | attrs[aindex++] = a; |
722 | } |
723 | } |
724 | return aindex; |
725 | } |
726 | |
727 | static struct attribute ** |
728 | __hwmon_create_attrs(const void *drvdata, const struct hwmon_chip_info *chip) |
729 | { |
730 | int ret, i, aindex = 0, nattrs = 0; |
731 | struct attribute **attrs; |
732 | |
733 | for (i = 0; chip->info[i]; i++) |
734 | nattrs += hwmon_num_channel_attrs(info: chip->info[i]); |
735 | |
736 | if (nattrs == 0) |
737 | return ERR_PTR(error: -EINVAL); |
738 | |
739 | attrs = kcalloc(n: nattrs + 1, size: sizeof(*attrs), GFP_KERNEL); |
740 | if (!attrs) |
741 | return ERR_PTR(error: -ENOMEM); |
742 | |
743 | for (i = 0; chip->info[i]; i++) { |
744 | ret = hwmon_genattrs(drvdata, attrs: &attrs[aindex], ops: chip->ops, |
745 | info: chip->info[i]); |
746 | if (ret < 0) { |
747 | hwmon_free_attrs(attrs); |
748 | return ERR_PTR(error: ret); |
749 | } |
750 | aindex += ret; |
751 | } |
752 | |
753 | return attrs; |
754 | } |
755 | |
756 | static struct device * |
757 | __hwmon_device_register(struct device *dev, const char *name, void *drvdata, |
758 | const struct hwmon_chip_info *chip, |
759 | const struct attribute_group **groups) |
760 | { |
761 | struct hwmon_device *hwdev; |
762 | const char *label; |
763 | struct device *hdev; |
764 | struct device *tdev = dev; |
765 | int i, err, id; |
766 | |
767 | /* Complain about invalid characters in hwmon name attribute */ |
768 | if (name && (!strlen(name) || strpbrk(name, "-* \t\n" ))) |
769 | dev_warn(dev, |
770 | "hwmon: '%s' is not a valid name attribute, please fix\n" , |
771 | name); |
772 | |
773 | id = ida_alloc(ida: &hwmon_ida, GFP_KERNEL); |
774 | if (id < 0) |
775 | return ERR_PTR(error: id); |
776 | |
777 | hwdev = kzalloc(size: sizeof(*hwdev), GFP_KERNEL); |
778 | if (hwdev == NULL) { |
779 | err = -ENOMEM; |
780 | goto ida_remove; |
781 | } |
782 | |
783 | hdev = &hwdev->dev; |
784 | |
785 | if (chip) { |
786 | struct attribute **attrs; |
787 | int ngroups = 2; /* terminating NULL plus &hwdev->groups */ |
788 | |
789 | if (groups) |
790 | for (i = 0; groups[i]; i++) |
791 | ngroups++; |
792 | |
793 | hwdev->groups = kcalloc(n: ngroups, size: sizeof(*groups), GFP_KERNEL); |
794 | if (!hwdev->groups) { |
795 | err = -ENOMEM; |
796 | goto free_hwmon; |
797 | } |
798 | |
799 | attrs = __hwmon_create_attrs(drvdata, chip); |
800 | if (IS_ERR(ptr: attrs)) { |
801 | err = PTR_ERR(ptr: attrs); |
802 | goto free_hwmon; |
803 | } |
804 | |
805 | hwdev->group.attrs = attrs; |
806 | ngroups = 0; |
807 | hwdev->groups[ngroups++] = &hwdev->group; |
808 | |
809 | if (groups) { |
810 | for (i = 0; groups[i]; i++) |
811 | hwdev->groups[ngroups++] = groups[i]; |
812 | } |
813 | |
814 | hdev->groups = hwdev->groups; |
815 | } else { |
816 | hdev->groups = groups; |
817 | } |
818 | |
819 | if (dev && device_property_present(dev, propname: "label" )) { |
820 | err = device_property_read_string(dev, propname: "label" , val: &label); |
821 | if (err < 0) |
822 | goto free_hwmon; |
823 | |
824 | hwdev->label = kstrdup(s: label, GFP_KERNEL); |
825 | if (hwdev->label == NULL) { |
826 | err = -ENOMEM; |
827 | goto free_hwmon; |
828 | } |
829 | } |
830 | |
831 | hwdev->name = name; |
832 | hdev->class = &hwmon_class; |
833 | hdev->parent = dev; |
834 | while (tdev && !tdev->of_node) |
835 | tdev = tdev->parent; |
836 | hdev->of_node = tdev ? tdev->of_node : NULL; |
837 | hwdev->chip = chip; |
838 | dev_set_drvdata(dev: hdev, data: drvdata); |
839 | dev_set_name(dev: hdev, HWMON_ID_FORMAT, id); |
840 | err = device_register(dev: hdev); |
841 | if (err) { |
842 | put_device(dev: hdev); |
843 | goto ida_remove; |
844 | } |
845 | |
846 | INIT_LIST_HEAD(list: &hwdev->tzdata); |
847 | |
848 | if (hdev->of_node && chip && chip->ops->read && |
849 | chip->info[0]->type == hwmon_chip && |
850 | (chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) { |
851 | err = hwmon_thermal_register_sensors(dev: hdev); |
852 | if (err) { |
853 | device_unregister(dev: hdev); |
854 | /* |
855 | * Don't worry about hwdev; hwmon_dev_release(), called |
856 | * from device_unregister(), will free it. |
857 | */ |
858 | goto ida_remove; |
859 | } |
860 | } |
861 | |
862 | return hdev; |
863 | |
864 | free_hwmon: |
865 | hwmon_dev_release(dev: hdev); |
866 | ida_remove: |
867 | ida_free(&hwmon_ida, id); |
868 | return ERR_PTR(error: err); |
869 | } |
870 | |
871 | /** |
872 | * hwmon_device_register_with_groups - register w/ hwmon |
873 | * @dev: the parent device |
874 | * @name: hwmon name attribute |
875 | * @drvdata: driver data to attach to created device |
876 | * @groups: List of attribute groups to create |
877 | * |
878 | * hwmon_device_unregister() must be called when the device is no |
879 | * longer needed. |
880 | * |
881 | * Returns the pointer to the new device. |
882 | */ |
883 | struct device * |
884 | hwmon_device_register_with_groups(struct device *dev, const char *name, |
885 | void *drvdata, |
886 | const struct attribute_group **groups) |
887 | { |
888 | if (!name) |
889 | return ERR_PTR(error: -EINVAL); |
890 | |
891 | return __hwmon_device_register(dev, name, drvdata, NULL, groups); |
892 | } |
893 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups); |
894 | |
895 | /** |
896 | * hwmon_device_register_with_info - register w/ hwmon |
897 | * @dev: the parent device (mandatory) |
898 | * @name: hwmon name attribute (mandatory) |
899 | * @drvdata: driver data to attach to created device (optional) |
900 | * @chip: pointer to hwmon chip information (mandatory) |
901 | * @extra_groups: pointer to list of additional non-standard attribute groups |
902 | * (optional) |
903 | * |
904 | * hwmon_device_unregister() must be called when the device is no |
905 | * longer needed. |
906 | * |
907 | * Returns the pointer to the new device. |
908 | */ |
909 | struct device * |
910 | hwmon_device_register_with_info(struct device *dev, const char *name, |
911 | void *drvdata, |
912 | const struct hwmon_chip_info *chip, |
913 | const struct attribute_group **) |
914 | { |
915 | if (!dev || !name || !chip) |
916 | return ERR_PTR(error: -EINVAL); |
917 | |
918 | if (!chip->ops || !chip->ops->is_visible || !chip->info) |
919 | return ERR_PTR(error: -EINVAL); |
920 | |
921 | return __hwmon_device_register(dev, name, drvdata, chip, groups: extra_groups); |
922 | } |
923 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_info); |
924 | |
925 | /** |
926 | * hwmon_device_register_for_thermal - register hwmon device for thermal subsystem |
927 | * @dev: the parent device |
928 | * @name: hwmon name attribute |
929 | * @drvdata: driver data to attach to created device |
930 | * |
931 | * The use of this function is restricted. It is provided for legacy reasons |
932 | * and must only be called from the thermal subsystem. |
933 | * |
934 | * hwmon_device_unregister() must be called when the device is no |
935 | * longer needed. |
936 | * |
937 | * Returns the pointer to the new device. |
938 | */ |
939 | struct device * |
940 | hwmon_device_register_for_thermal(struct device *dev, const char *name, |
941 | void *drvdata) |
942 | { |
943 | if (!name || !dev) |
944 | return ERR_PTR(error: -EINVAL); |
945 | |
946 | return __hwmon_device_register(dev, name, drvdata, NULL, NULL); |
947 | } |
948 | EXPORT_SYMBOL_NS_GPL(hwmon_device_register_for_thermal, HWMON_THERMAL); |
949 | |
950 | /** |
951 | * hwmon_device_register - register w/ hwmon |
952 | * @dev: the device to register |
953 | * |
954 | * hwmon_device_unregister() must be called when the device is no |
955 | * longer needed. |
956 | * |
957 | * Returns the pointer to the new device. |
958 | */ |
959 | struct device *hwmon_device_register(struct device *dev) |
960 | { |
961 | dev_warn(dev, |
962 | "hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().\n" ); |
963 | |
964 | return __hwmon_device_register(dev, NULL, NULL, NULL, NULL); |
965 | } |
966 | EXPORT_SYMBOL_GPL(hwmon_device_register); |
967 | |
968 | /** |
969 | * hwmon_device_unregister - removes the previously registered class device |
970 | * |
971 | * @dev: the class device to destroy |
972 | */ |
973 | void hwmon_device_unregister(struct device *dev) |
974 | { |
975 | int id; |
976 | |
977 | if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { |
978 | device_unregister(dev); |
979 | ida_free(&hwmon_ida, id); |
980 | } else |
981 | dev_dbg(dev->parent, |
982 | "hwmon_device_unregister() failed: bad class ID!\n" ); |
983 | } |
984 | EXPORT_SYMBOL_GPL(hwmon_device_unregister); |
985 | |
986 | static void devm_hwmon_release(struct device *dev, void *res) |
987 | { |
988 | struct device *hwdev = *(struct device **)res; |
989 | |
990 | hwmon_device_unregister(hwdev); |
991 | } |
992 | |
993 | /** |
994 | * devm_hwmon_device_register_with_groups - register w/ hwmon |
995 | * @dev: the parent device |
996 | * @name: hwmon name attribute |
997 | * @drvdata: driver data to attach to created device |
998 | * @groups: List of attribute groups to create |
999 | * |
1000 | * Returns the pointer to the new device. The new device is automatically |
1001 | * unregistered with the parent device. |
1002 | */ |
1003 | struct device * |
1004 | devm_hwmon_device_register_with_groups(struct device *dev, const char *name, |
1005 | void *drvdata, |
1006 | const struct attribute_group **groups) |
1007 | { |
1008 | struct device **ptr, *hwdev; |
1009 | |
1010 | if (!dev) |
1011 | return ERR_PTR(error: -EINVAL); |
1012 | |
1013 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); |
1014 | if (!ptr) |
1015 | return ERR_PTR(error: -ENOMEM); |
1016 | |
1017 | hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups); |
1018 | if (IS_ERR(ptr: hwdev)) |
1019 | goto error; |
1020 | |
1021 | *ptr = hwdev; |
1022 | devres_add(dev, res: ptr); |
1023 | return hwdev; |
1024 | |
1025 | error: |
1026 | devres_free(res: ptr); |
1027 | return hwdev; |
1028 | } |
1029 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups); |
1030 | |
1031 | /** |
1032 | * devm_hwmon_device_register_with_info - register w/ hwmon |
1033 | * @dev: the parent device |
1034 | * @name: hwmon name attribute |
1035 | * @drvdata: driver data to attach to created device |
1036 | * @chip: pointer to hwmon chip information |
1037 | * @extra_groups: pointer to list of driver specific attribute groups |
1038 | * |
1039 | * Returns the pointer to the new device. The new device is automatically |
1040 | * unregistered with the parent device. |
1041 | */ |
1042 | struct device * |
1043 | devm_hwmon_device_register_with_info(struct device *dev, const char *name, |
1044 | void *drvdata, |
1045 | const struct hwmon_chip_info *chip, |
1046 | const struct attribute_group **) |
1047 | { |
1048 | struct device **ptr, *hwdev; |
1049 | |
1050 | if (!dev) |
1051 | return ERR_PTR(error: -EINVAL); |
1052 | |
1053 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); |
1054 | if (!ptr) |
1055 | return ERR_PTR(error: -ENOMEM); |
1056 | |
1057 | hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip, |
1058 | extra_groups); |
1059 | if (IS_ERR(ptr: hwdev)) |
1060 | goto error; |
1061 | |
1062 | *ptr = hwdev; |
1063 | devres_add(dev, res: ptr); |
1064 | |
1065 | return hwdev; |
1066 | |
1067 | error: |
1068 | devres_free(res: ptr); |
1069 | return hwdev; |
1070 | } |
1071 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info); |
1072 | |
1073 | static int devm_hwmon_match(struct device *dev, void *res, void *data) |
1074 | { |
1075 | struct device **hwdev = res; |
1076 | |
1077 | return *hwdev == data; |
1078 | } |
1079 | |
1080 | /** |
1081 | * devm_hwmon_device_unregister - removes a previously registered hwmon device |
1082 | * |
1083 | * @dev: the parent device of the device to unregister |
1084 | */ |
1085 | void devm_hwmon_device_unregister(struct device *dev) |
1086 | { |
1087 | WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev)); |
1088 | } |
1089 | EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister); |
1090 | |
1091 | static char *__hwmon_sanitize_name(struct device *dev, const char *old_name) |
1092 | { |
1093 | char *name, *p; |
1094 | |
1095 | if (dev) |
1096 | name = devm_kstrdup(dev, s: old_name, GFP_KERNEL); |
1097 | else |
1098 | name = kstrdup(s: old_name, GFP_KERNEL); |
1099 | if (!name) |
1100 | return ERR_PTR(error: -ENOMEM); |
1101 | |
1102 | for (p = name; *p; p++) |
1103 | if (hwmon_is_bad_char(ch: *p)) |
1104 | *p = '_'; |
1105 | |
1106 | return name; |
1107 | } |
1108 | |
1109 | /** |
1110 | * hwmon_sanitize_name - Replaces invalid characters in a hwmon name |
1111 | * @name: NUL-terminated name |
1112 | * |
1113 | * Allocates a new string where any invalid characters will be replaced |
1114 | * by an underscore. It is the responsibility of the caller to release |
1115 | * the memory. |
1116 | * |
1117 | * Returns newly allocated name, or ERR_PTR on error. |
1118 | */ |
1119 | char *hwmon_sanitize_name(const char *name) |
1120 | { |
1121 | return __hwmon_sanitize_name(NULL, old_name: name); |
1122 | } |
1123 | EXPORT_SYMBOL_GPL(hwmon_sanitize_name); |
1124 | |
1125 | /** |
1126 | * devm_hwmon_sanitize_name - resource managed hwmon_sanitize_name() |
1127 | * @dev: device to allocate memory for |
1128 | * @name: NUL-terminated name |
1129 | * |
1130 | * Allocates a new string where any invalid characters will be replaced |
1131 | * by an underscore. |
1132 | * |
1133 | * Returns newly allocated name, or ERR_PTR on error. |
1134 | */ |
1135 | char *devm_hwmon_sanitize_name(struct device *dev, const char *name) |
1136 | { |
1137 | if (!dev) |
1138 | return ERR_PTR(error: -EINVAL); |
1139 | |
1140 | return __hwmon_sanitize_name(dev, old_name: name); |
1141 | } |
1142 | EXPORT_SYMBOL_GPL(devm_hwmon_sanitize_name); |
1143 | |
1144 | static void __init hwmon_pci_quirks(void) |
1145 | { |
1146 | #if defined CONFIG_X86 && defined CONFIG_PCI |
1147 | struct pci_dev *sb; |
1148 | u16 base; |
1149 | u8 enable; |
1150 | |
1151 | /* Open access to 0x295-0x296 on MSI MS-7031 */ |
1152 | sb = pci_get_device(PCI_VENDOR_ID_ATI, device: 0x436c, NULL); |
1153 | if (sb) { |
1154 | if (sb->subsystem_vendor == 0x1462 && /* MSI */ |
1155 | sb->subsystem_device == 0x0031) { /* MS-7031 */ |
1156 | pci_read_config_byte(dev: sb, where: 0x48, val: &enable); |
1157 | pci_read_config_word(dev: sb, where: 0x64, val: &base); |
1158 | |
1159 | if (base == 0 && !(enable & BIT(2))) { |
1160 | dev_info(&sb->dev, |
1161 | "Opening wide generic port at 0x295\n" ); |
1162 | pci_write_config_word(dev: sb, where: 0x64, val: 0x295); |
1163 | pci_write_config_byte(dev: sb, where: 0x48, |
1164 | val: enable | BIT(2)); |
1165 | } |
1166 | } |
1167 | pci_dev_put(dev: sb); |
1168 | } |
1169 | #endif |
1170 | } |
1171 | |
1172 | static int __init hwmon_init(void) |
1173 | { |
1174 | int err; |
1175 | |
1176 | hwmon_pci_quirks(); |
1177 | |
1178 | err = class_register(class: &hwmon_class); |
1179 | if (err) { |
1180 | pr_err("couldn't register hwmon sysfs class\n" ); |
1181 | return err; |
1182 | } |
1183 | return 0; |
1184 | } |
1185 | |
1186 | static void __exit hwmon_exit(void) |
1187 | { |
1188 | class_unregister(class: &hwmon_class); |
1189 | } |
1190 | |
1191 | subsys_initcall(hwmon_init); |
1192 | module_exit(hwmon_exit); |
1193 | |
1194 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>" ); |
1195 | MODULE_DESCRIPTION("hardware monitoring sysfs/class support" ); |
1196 | MODULE_LICENSE("GPL" ); |
1197 | |
1198 | |