]>
Commit | Line | Data |
---|---|---|
1236441f | 1 | /* |
5ed04880 GR |
2 | * hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring |
3 | * | |
4 | * This file defines the sysfs class "hwmon", for use by sensors drivers. | |
5 | * | |
6 | * Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
11 | */ | |
1236441f | 12 | |
c95df1ae JP |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
d560168b | 15 | #include <linux/bitops.h> |
1236441f MH |
16 | #include <linux/device.h> |
17 | #include <linux/err.h> | |
8c65b4a6 | 18 | #include <linux/gfp.h> |
c9ebbe6f GR |
19 | #include <linux/hwmon.h> |
20 | #include <linux/idr.h> | |
21 | #include <linux/module.h> | |
2958b1ec | 22 | #include <linux/pci.h> |
c9ebbe6f | 23 | #include <linux/slab.h> |
648cd48c | 24 | #include <linux/string.h> |
d560168b | 25 | #include <linux/thermal.h> |
1236441f MH |
26 | |
27 | #define HWMON_ID_PREFIX "hwmon" | |
28 | #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" | |
29 | ||
bab2243c GR |
30 | struct hwmon_device { |
31 | const char *name; | |
32 | struct device dev; | |
d560168b GR |
33 | const struct hwmon_chip_info *chip; |
34 | ||
35 | struct attribute_group group; | |
36 | const struct attribute_group **groups; | |
bab2243c | 37 | }; |
d560168b | 38 | |
bab2243c GR |
39 | #define to_hwmon_device(d) container_of(d, struct hwmon_device, dev) |
40 | ||
d560168b GR |
41 | struct hwmon_device_attribute { |
42 | struct device_attribute dev_attr; | |
43 | const struct hwmon_ops *ops; | |
44 | enum hwmon_sensor_types type; | |
45 | u32 attr; | |
46 | int index; | |
47 | }; | |
48 | ||
49 | #define to_hwmon_attr(d) \ | |
50 | container_of(d, struct hwmon_device_attribute, dev_attr) | |
51 | ||
52 | /* | |
53 | * Thermal zone information | |
54 | * In addition to the reference to the hwmon device, | |
55 | * also provides the sensor index. | |
56 | */ | |
57 | struct hwmon_thermal_data { | |
58 | struct hwmon_device *hwdev; /* Reference to hwmon device */ | |
59 | int index; /* sensor index */ | |
60 | }; | |
61 | ||
bab2243c GR |
62 | static ssize_t |
63 | show_name(struct device *dev, struct device_attribute *attr, char *buf) | |
64 | { | |
65 | return sprintf(buf, "%s\n", to_hwmon_device(dev)->name); | |
66 | } | |
67 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
68 | ||
69 | static struct attribute *hwmon_dev_attrs[] = { | |
70 | &dev_attr_name.attr, | |
71 | NULL | |
72 | }; | |
73 | ||
74 | static umode_t hwmon_dev_name_is_visible(struct kobject *kobj, | |
75 | struct attribute *attr, int n) | |
76 | { | |
77 | struct device *dev = container_of(kobj, struct device, kobj); | |
78 | ||
79 | if (to_hwmon_device(dev)->name == NULL) | |
80 | return 0; | |
81 | ||
82 | return attr->mode; | |
83 | } | |
84 | ||
85 | static struct attribute_group hwmon_dev_attr_group = { | |
86 | .attrs = hwmon_dev_attrs, | |
87 | .is_visible = hwmon_dev_name_is_visible, | |
88 | }; | |
89 | ||
90 | static const struct attribute_group *hwmon_dev_attr_groups[] = { | |
91 | &hwmon_dev_attr_group, | |
92 | NULL | |
93 | }; | |
94 | ||
95 | static void hwmon_dev_release(struct device *dev) | |
96 | { | |
97 | kfree(to_hwmon_device(dev)); | |
98 | } | |
99 | ||
100 | static struct class hwmon_class = { | |
101 | .name = "hwmon", | |
102 | .owner = THIS_MODULE, | |
103 | .dev_groups = hwmon_dev_attr_groups, | |
104 | .dev_release = hwmon_dev_release, | |
105 | }; | |
1236441f | 106 | |
4ca5f468 | 107 | static DEFINE_IDA(hwmon_ida); |
1236441f | 108 | |
d560168b GR |
109 | /* Thermal zone handling */ |
110 | ||
111 | #if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) | |
112 | static int hwmon_thermal_get_temp(void *data, int *temp) | |
113 | { | |
114 | struct hwmon_thermal_data *tdata = data; | |
115 | struct hwmon_device *hwdev = tdata->hwdev; | |
116 | int ret; | |
117 | long t; | |
118 | ||
119 | ret = hwdev->chip->ops->read(&hwdev->dev, hwmon_temp, hwmon_temp_input, | |
120 | tdata->index, &t); | |
121 | if (ret < 0) | |
122 | return ret; | |
123 | ||
124 | *temp = t; | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static struct thermal_zone_of_device_ops hwmon_thermal_ops = { | |
130 | .get_temp = hwmon_thermal_get_temp, | |
131 | }; | |
132 | ||
133 | static int hwmon_thermal_add_sensor(struct device *dev, | |
134 | struct hwmon_device *hwdev, int index) | |
135 | { | |
136 | struct hwmon_thermal_data *tdata; | |
137 | ||
138 | tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL); | |
139 | if (!tdata) | |
140 | return -ENOMEM; | |
141 | ||
142 | tdata->hwdev = hwdev; | |
143 | tdata->index = index; | |
144 | ||
145 | devm_thermal_zone_of_sensor_register(&hwdev->dev, index, tdata, | |
146 | &hwmon_thermal_ops); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | #else | |
151 | static int hwmon_thermal_add_sensor(struct device *dev, | |
152 | struct hwmon_device *hwdev, int index) | |
153 | { | |
154 | return 0; | |
155 | } | |
156 | #endif /* IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) */ | |
157 | ||
158 | /* sysfs attribute management */ | |
159 | ||
160 | static ssize_t hwmon_attr_show(struct device *dev, | |
161 | struct device_attribute *devattr, char *buf) | |
162 | { | |
163 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
164 | long val; | |
165 | int ret; | |
166 | ||
167 | ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index, | |
168 | &val); | |
169 | if (ret < 0) | |
170 | return ret; | |
171 | ||
172 | return sprintf(buf, "%ld\n", val); | |
173 | } | |
174 | ||
175 | static ssize_t hwmon_attr_store(struct device *dev, | |
176 | struct device_attribute *devattr, | |
177 | const char *buf, size_t count) | |
178 | { | |
179 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
180 | long val; | |
181 | int ret; | |
182 | ||
183 | ret = kstrtol(buf, 10, &val); | |
184 | if (ret < 0) | |
185 | return ret; | |
186 | ||
187 | ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index, | |
188 | val); | |
189 | if (ret < 0) | |
190 | return ret; | |
191 | ||
192 | return count; | |
193 | } | |
194 | ||
195 | static int hwmon_attr_base(enum hwmon_sensor_types type) | |
196 | { | |
197 | if (type == hwmon_in) | |
198 | return 0; | |
199 | return 1; | |
200 | } | |
201 | ||
202 | static struct attribute *hwmon_genattr(struct device *dev, | |
203 | const void *drvdata, | |
204 | enum hwmon_sensor_types type, | |
205 | u32 attr, | |
206 | int index, | |
207 | const char *template, | |
208 | const struct hwmon_ops *ops) | |
209 | { | |
210 | struct hwmon_device_attribute *hattr; | |
211 | struct device_attribute *dattr; | |
212 | struct attribute *a; | |
213 | umode_t mode; | |
214 | char *name; | |
215 | ||
216 | /* The attribute is invisible if there is no template string */ | |
217 | if (!template) | |
218 | return ERR_PTR(-ENOENT); | |
219 | ||
220 | mode = ops->is_visible(drvdata, type, attr, index); | |
221 | if (!mode) | |
222 | return ERR_PTR(-ENOENT); | |
223 | ||
224 | if ((mode & S_IRUGO) && !ops->read) | |
225 | return ERR_PTR(-EINVAL); | |
226 | if ((mode & S_IWUGO) && !ops->write) | |
227 | return ERR_PTR(-EINVAL); | |
228 | ||
229 | if (type == hwmon_chip) { | |
230 | name = (char *)template; | |
231 | } else { | |
232 | name = devm_kzalloc(dev, strlen(template) + 16, GFP_KERNEL); | |
233 | if (!name) | |
234 | return ERR_PTR(-ENOMEM); | |
235 | scnprintf(name, strlen(template) + 16, template, | |
236 | index + hwmon_attr_base(type)); | |
237 | } | |
238 | ||
239 | hattr = devm_kzalloc(dev, sizeof(*hattr), GFP_KERNEL); | |
240 | if (!hattr) | |
241 | return ERR_PTR(-ENOMEM); | |
242 | ||
243 | hattr->type = type; | |
244 | hattr->attr = attr; | |
245 | hattr->index = index; | |
246 | hattr->ops = ops; | |
247 | ||
248 | dattr = &hattr->dev_attr; | |
249 | dattr->show = hwmon_attr_show; | |
250 | dattr->store = hwmon_attr_store; | |
251 | ||
252 | a = &dattr->attr; | |
253 | sysfs_attr_init(a); | |
254 | a->name = name; | |
255 | a->mode = mode; | |
256 | ||
257 | return a; | |
258 | } | |
259 | ||
260 | static const char * const hwmon_chip_attr_templates[] = { | |
261 | [hwmon_chip_temp_reset_history] = "temp_reset_history", | |
00d616cf | 262 | [hwmon_chip_in_reset_history] = "in_reset_history", |
9b26947c | 263 | [hwmon_chip_curr_reset_history] = "curr_reset_history", |
d560168b GR |
264 | [hwmon_chip_update_interval] = "update_interval", |
265 | [hwmon_chip_alarms] = "alarms", | |
266 | }; | |
267 | ||
268 | static const char * const hwmon_temp_attr_templates[] = { | |
269 | [hwmon_temp_input] = "temp%d_input", | |
270 | [hwmon_temp_type] = "temp%d_type", | |
271 | [hwmon_temp_lcrit] = "temp%d_lcrit", | |
272 | [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst", | |
273 | [hwmon_temp_min] = "temp%d_min", | |
274 | [hwmon_temp_min_hyst] = "temp%d_min_hyst", | |
275 | [hwmon_temp_max] = "temp%d_max", | |
276 | [hwmon_temp_max_hyst] = "temp%d_max_hyst", | |
277 | [hwmon_temp_crit] = "temp%d_crit", | |
278 | [hwmon_temp_crit_hyst] = "temp%d_crit_hyst", | |
279 | [hwmon_temp_emergency] = "temp%d_emergency", | |
280 | [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst", | |
281 | [hwmon_temp_alarm] = "temp%d_alarm", | |
282 | [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm", | |
283 | [hwmon_temp_min_alarm] = "temp%d_min_alarm", | |
284 | [hwmon_temp_max_alarm] = "temp%d_max_alarm", | |
285 | [hwmon_temp_crit_alarm] = "temp%d_crit_alarm", | |
286 | [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm", | |
287 | [hwmon_temp_fault] = "temp%d_fault", | |
288 | [hwmon_temp_offset] = "temp%d_offset", | |
289 | [hwmon_temp_label] = "temp%d_label", | |
290 | [hwmon_temp_lowest] = "temp%d_lowest", | |
291 | [hwmon_temp_highest] = "temp%d_highest", | |
292 | [hwmon_temp_reset_history] = "temp%d_reset_history", | |
293 | }; | |
294 | ||
00d616cf GR |
295 | static const char * const hwmon_in_attr_templates[] = { |
296 | [hwmon_in_input] = "in%d_input", | |
297 | [hwmon_in_min] = "in%d_min", | |
298 | [hwmon_in_max] = "in%d_max", | |
299 | [hwmon_in_lcrit] = "in%d_lcrit", | |
300 | [hwmon_in_crit] = "in%d_crit", | |
301 | [hwmon_in_average] = "in%d_average", | |
302 | [hwmon_in_lowest] = "in%d_lowest", | |
303 | [hwmon_in_highest] = "in%d_highest", | |
304 | [hwmon_in_reset_history] = "in%d_reset_history", | |
305 | [hwmon_in_label] = "in%d_label", | |
306 | [hwmon_in_alarm] = "in%d_alarm", | |
307 | [hwmon_in_min_alarm] = "in%d_min_alarm", | |
308 | [hwmon_in_max_alarm] = "in%d_max_alarm", | |
309 | [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm", | |
310 | [hwmon_in_crit_alarm] = "in%d_crit_alarm", | |
311 | }; | |
312 | ||
9b26947c GR |
313 | static const char * const hwmon_curr_attr_templates[] = { |
314 | [hwmon_curr_input] = "curr%d_input", | |
315 | [hwmon_curr_min] = "curr%d_min", | |
316 | [hwmon_curr_max] = "curr%d_max", | |
317 | [hwmon_curr_lcrit] = "curr%d_lcrit", | |
318 | [hwmon_curr_crit] = "curr%d_crit", | |
319 | [hwmon_curr_average] = "curr%d_average", | |
320 | [hwmon_curr_lowest] = "curr%d_lowest", | |
321 | [hwmon_curr_highest] = "curr%d_highest", | |
322 | [hwmon_curr_reset_history] = "curr%d_reset_history", | |
323 | [hwmon_curr_label] = "curr%d_label", | |
324 | [hwmon_curr_alarm] = "curr%d_alarm", | |
325 | [hwmon_curr_min_alarm] = "curr%d_min_alarm", | |
326 | [hwmon_curr_max_alarm] = "curr%d_max_alarm", | |
327 | [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm", | |
328 | [hwmon_curr_crit_alarm] = "curr%d_crit_alarm", | |
329 | }; | |
330 | ||
d560168b GR |
331 | static const char * const *__templates[] = { |
332 | [hwmon_chip] = hwmon_chip_attr_templates, | |
333 | [hwmon_temp] = hwmon_temp_attr_templates, | |
00d616cf | 334 | [hwmon_in] = hwmon_in_attr_templates, |
9b26947c | 335 | [hwmon_curr] = hwmon_curr_attr_templates, |
d560168b GR |
336 | }; |
337 | ||
338 | static const int __templates_size[] = { | |
339 | [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attr_templates), | |
340 | [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates), | |
00d616cf | 341 | [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates), |
9b26947c | 342 | [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates), |
d560168b GR |
343 | }; |
344 | ||
345 | static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info) | |
346 | { | |
347 | int i, n; | |
348 | ||
349 | for (i = n = 0; info->config[i]; i++) | |
350 | n += hweight32(info->config[i]); | |
351 | ||
352 | return n; | |
353 | } | |
354 | ||
355 | static int hwmon_genattrs(struct device *dev, | |
356 | const void *drvdata, | |
357 | struct attribute **attrs, | |
358 | const struct hwmon_ops *ops, | |
359 | const struct hwmon_channel_info *info) | |
360 | { | |
361 | const char * const *templates; | |
362 | int template_size; | |
363 | int i, aindex = 0; | |
364 | ||
365 | if (info->type >= ARRAY_SIZE(__templates)) | |
366 | return -EINVAL; | |
367 | ||
368 | templates = __templates[info->type]; | |
369 | template_size = __templates_size[info->type]; | |
370 | ||
371 | for (i = 0; info->config[i]; i++) { | |
372 | u32 attr_mask = info->config[i]; | |
373 | u32 attr; | |
374 | ||
375 | while (attr_mask) { | |
376 | struct attribute *a; | |
377 | ||
378 | attr = __ffs(attr_mask); | |
379 | attr_mask &= ~BIT(attr); | |
380 | if (attr >= template_size) | |
381 | return -EINVAL; | |
382 | a = hwmon_genattr(dev, drvdata, info->type, attr, i, | |
383 | templates[attr], ops); | |
384 | if (IS_ERR(a)) { | |
385 | if (PTR_ERR(a) != -ENOENT) | |
386 | return PTR_ERR(a); | |
387 | continue; | |
388 | } | |
389 | attrs[aindex++] = a; | |
390 | } | |
391 | } | |
392 | return aindex; | |
393 | } | |
394 | ||
395 | static struct attribute ** | |
396 | __hwmon_create_attrs(struct device *dev, const void *drvdata, | |
397 | const struct hwmon_chip_info *chip) | |
398 | { | |
399 | int ret, i, aindex = 0, nattrs = 0; | |
400 | struct attribute **attrs; | |
401 | ||
402 | for (i = 0; chip->info[i]; i++) | |
403 | nattrs += hwmon_num_channel_attrs(chip->info[i]); | |
404 | ||
405 | if (nattrs == 0) | |
406 | return ERR_PTR(-EINVAL); | |
407 | ||
408 | attrs = devm_kcalloc(dev, nattrs + 1, sizeof(*attrs), GFP_KERNEL); | |
409 | if (!attrs) | |
410 | return ERR_PTR(-ENOMEM); | |
411 | ||
412 | for (i = 0; chip->info[i]; i++) { | |
413 | ret = hwmon_genattrs(dev, drvdata, &attrs[aindex], chip->ops, | |
414 | chip->info[i]); | |
415 | if (ret < 0) | |
416 | return ERR_PTR(ret); | |
417 | aindex += ret; | |
418 | } | |
419 | ||
420 | return attrs; | |
421 | } | |
422 | ||
423 | static struct device * | |
424 | __hwmon_device_register(struct device *dev, const char *name, void *drvdata, | |
425 | const struct hwmon_chip_info *chip, | |
426 | const struct attribute_group **groups) | |
1236441f | 427 | { |
bab2243c | 428 | struct hwmon_device *hwdev; |
d560168b GR |
429 | struct device *hdev; |
430 | int i, j, err, id; | |
ded2b666 | 431 | |
648cd48c GR |
432 | /* Do not accept invalid characters in hwmon name attribute */ |
433 | if (name && (!strlen(name) || strpbrk(name, "-* \t\n"))) | |
434 | return ERR_PTR(-EINVAL); | |
435 | ||
4ca5f468 JC |
436 | id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL); |
437 | if (id < 0) | |
438 | return ERR_PTR(id); | |
1236441f | 439 | |
bab2243c GR |
440 | hwdev = kzalloc(sizeof(*hwdev), GFP_KERNEL); |
441 | if (hwdev == NULL) { | |
442 | err = -ENOMEM; | |
443 | goto ida_remove; | |
444 | } | |
1236441f | 445 | |
d560168b GR |
446 | hdev = &hwdev->dev; |
447 | ||
448 | if (chip && chip->ops->is_visible) { | |
449 | struct attribute **attrs; | |
450 | int ngroups = 2; | |
451 | ||
452 | if (groups) | |
453 | for (i = 0; groups[i]; i++) | |
454 | ngroups++; | |
455 | ||
456 | hwdev->groups = devm_kcalloc(dev, ngroups, sizeof(*groups), | |
457 | GFP_KERNEL); | |
458 | if (!hwdev->groups) | |
459 | return ERR_PTR(-ENOMEM); | |
460 | ||
461 | attrs = __hwmon_create_attrs(dev, drvdata, chip); | |
462 | if (IS_ERR(attrs)) { | |
463 | err = PTR_ERR(attrs); | |
464 | goto free_hwmon; | |
465 | } | |
466 | ||
467 | hwdev->group.attrs = attrs; | |
468 | ngroups = 0; | |
469 | hwdev->groups[ngroups++] = &hwdev->group; | |
470 | ||
471 | if (groups) { | |
472 | for (i = 0; groups[i]; i++) | |
473 | hwdev->groups[ngroups++] = groups[i]; | |
474 | } | |
475 | ||
476 | hdev->groups = hwdev->groups; | |
477 | } else { | |
478 | hdev->groups = groups; | |
479 | } | |
480 | ||
bab2243c | 481 | hwdev->name = name; |
d560168b GR |
482 | hdev->class = &hwmon_class; |
483 | hdev->parent = dev; | |
484 | hdev->of_node = dev ? dev->of_node : NULL; | |
485 | hwdev->chip = chip; | |
486 | dev_set_drvdata(hdev, drvdata); | |
487 | dev_set_name(hdev, HWMON_ID_FORMAT, id); | |
488 | err = device_register(hdev); | |
bab2243c | 489 | if (err) |
d560168b GR |
490 | goto free_hwmon; |
491 | ||
492 | if (chip && chip->ops->is_visible && chip->ops->read && | |
493 | chip->info[0]->type == hwmon_chip && | |
494 | (chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) { | |
495 | const struct hwmon_channel_info **info = chip->info; | |
496 | ||
497 | for (i = 1; info[i]; i++) { | |
498 | if (info[i]->type != hwmon_temp) | |
499 | continue; | |
500 | ||
501 | for (j = 0; info[i]->config[j]; j++) { | |
502 | if (!chip->ops->is_visible(drvdata, hwmon_temp, | |
503 | hwmon_temp_input, j)) | |
504 | continue; | |
505 | if (info[i]->config[j] & HWMON_T_INPUT) | |
506 | hwmon_thermal_add_sensor(dev, hwdev, j); | |
507 | } | |
508 | } | |
509 | } | |
bab2243c | 510 | |
d560168b | 511 | return hdev; |
bab2243c | 512 | |
d560168b | 513 | free_hwmon: |
bab2243c GR |
514 | kfree(hwdev); |
515 | ida_remove: | |
516 | ida_simple_remove(&hwmon_ida, id); | |
517 | return ERR_PTR(err); | |
518 | } | |
d560168b GR |
519 | |
520 | /** | |
521 | * hwmon_device_register_with_groups - register w/ hwmon | |
522 | * @dev: the parent device | |
523 | * @name: hwmon name attribute | |
524 | * @drvdata: driver data to attach to created device | |
525 | * @groups: List of attribute groups to create | |
526 | * | |
527 | * hwmon_device_unregister() must be called when the device is no | |
528 | * longer needed. | |
529 | * | |
530 | * Returns the pointer to the new device. | |
531 | */ | |
532 | struct device * | |
533 | hwmon_device_register_with_groups(struct device *dev, const char *name, | |
534 | void *drvdata, | |
535 | const struct attribute_group **groups) | |
536 | { | |
537 | return __hwmon_device_register(dev, name, drvdata, NULL, groups); | |
538 | } | |
bab2243c | 539 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups); |
1236441f | 540 | |
d560168b GR |
541 | /** |
542 | * hwmon_device_register_with_info - register w/ hwmon | |
543 | * @dev: the parent device | |
544 | * @name: hwmon name attribute | |
545 | * @drvdata: driver data to attach to created device | |
546 | * @info: Pointer to hwmon chip information | |
547 | * @groups - pointer to list of driver specific attribute groups | |
548 | * | |
549 | * hwmon_device_unregister() must be called when the device is no | |
550 | * longer needed. | |
551 | * | |
552 | * Returns the pointer to the new device. | |
553 | */ | |
554 | struct device * | |
555 | hwmon_device_register_with_info(struct device *dev, const char *name, | |
556 | void *drvdata, | |
557 | const struct hwmon_chip_info *chip, | |
558 | const struct attribute_group **groups) | |
559 | { | |
560 | if (chip && (!chip->ops || !chip->info)) | |
561 | return ERR_PTR(-EINVAL); | |
562 | ||
563 | return __hwmon_device_register(dev, name, drvdata, chip, groups); | |
564 | } | |
565 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_info); | |
566 | ||
bab2243c GR |
567 | /** |
568 | * hwmon_device_register - register w/ hwmon | |
569 | * @dev: the device to register | |
570 | * | |
571 | * hwmon_device_unregister() must be called when the device is no | |
572 | * longer needed. | |
573 | * | |
574 | * Returns the pointer to the new device. | |
575 | */ | |
576 | struct device *hwmon_device_register(struct device *dev) | |
577 | { | |
578 | return hwmon_device_register_with_groups(dev, NULL, NULL, NULL); | |
1236441f | 579 | } |
839a9eef | 580 | EXPORT_SYMBOL_GPL(hwmon_device_register); |
1236441f MH |
581 | |
582 | /** | |
583 | * hwmon_device_unregister - removes the previously registered class device | |
584 | * | |
1beeffe4 | 585 | * @dev: the class device to destroy |
1236441f | 586 | */ |
1beeffe4 | 587 | void hwmon_device_unregister(struct device *dev) |
1236441f MH |
588 | { |
589 | int id; | |
590 | ||
739cf3a2 | 591 | if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { |
1beeffe4 | 592 | device_unregister(dev); |
4ca5f468 | 593 | ida_simple_remove(&hwmon_ida, id); |
1236441f | 594 | } else |
1beeffe4 | 595 | dev_dbg(dev->parent, |
1236441f MH |
596 | "hwmon_device_unregister() failed: bad class ID!\n"); |
597 | } | |
839a9eef | 598 | EXPORT_SYMBOL_GPL(hwmon_device_unregister); |
1236441f | 599 | |
74188cba GR |
600 | static void devm_hwmon_release(struct device *dev, void *res) |
601 | { | |
602 | struct device *hwdev = *(struct device **)res; | |
603 | ||
604 | hwmon_device_unregister(hwdev); | |
605 | } | |
606 | ||
607 | /** | |
608 | * devm_hwmon_device_register_with_groups - register w/ hwmon | |
609 | * @dev: the parent device | |
610 | * @name: hwmon name attribute | |
611 | * @drvdata: driver data to attach to created device | |
612 | * @groups: List of attribute groups to create | |
613 | * | |
614 | * Returns the pointer to the new device. The new device is automatically | |
615 | * unregistered with the parent device. | |
616 | */ | |
617 | struct device * | |
618 | devm_hwmon_device_register_with_groups(struct device *dev, const char *name, | |
619 | void *drvdata, | |
620 | const struct attribute_group **groups) | |
621 | { | |
622 | struct device **ptr, *hwdev; | |
623 | ||
624 | if (!dev) | |
625 | return ERR_PTR(-EINVAL); | |
626 | ||
627 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); | |
628 | if (!ptr) | |
629 | return ERR_PTR(-ENOMEM); | |
630 | ||
631 | hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups); | |
632 | if (IS_ERR(hwdev)) | |
633 | goto error; | |
634 | ||
635 | *ptr = hwdev; | |
636 | devres_add(dev, ptr); | |
637 | return hwdev; | |
638 | ||
639 | error: | |
640 | devres_free(ptr); | |
641 | return hwdev; | |
642 | } | |
643 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups); | |
644 | ||
d560168b GR |
645 | /** |
646 | * devm_hwmon_device_register_with_info - register w/ hwmon | |
647 | * @dev: the parent device | |
648 | * @name: hwmon name attribute | |
649 | * @drvdata: driver data to attach to created device | |
650 | * @info: Pointer to hwmon chip information | |
651 | * @groups - pointer to list of driver specific attribute groups | |
652 | * | |
653 | * Returns the pointer to the new device. The new device is automatically | |
654 | * unregistered with the parent device. | |
655 | */ | |
656 | struct device * | |
657 | devm_hwmon_device_register_with_info(struct device *dev, const char *name, | |
658 | void *drvdata, | |
659 | const struct hwmon_chip_info *chip, | |
660 | const struct attribute_group **groups) | |
661 | { | |
662 | struct device **ptr, *hwdev; | |
663 | ||
664 | if (!dev) | |
665 | return ERR_PTR(-EINVAL); | |
666 | ||
667 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); | |
668 | if (!ptr) | |
669 | return ERR_PTR(-ENOMEM); | |
670 | ||
671 | hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip, | |
672 | groups); | |
673 | if (IS_ERR(hwdev)) | |
674 | goto error; | |
675 | ||
676 | *ptr = hwdev; | |
677 | devres_add(dev, ptr); | |
678 | ||
679 | return hwdev; | |
680 | ||
681 | error: | |
682 | devres_free(ptr); | |
683 | return hwdev; | |
684 | } | |
685 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info); | |
686 | ||
74188cba GR |
687 | static int devm_hwmon_match(struct device *dev, void *res, void *data) |
688 | { | |
689 | struct device **hwdev = res; | |
690 | ||
691 | return *hwdev == data; | |
692 | } | |
693 | ||
694 | /** | |
695 | * devm_hwmon_device_unregister - removes a previously registered hwmon device | |
696 | * | |
697 | * @dev: the parent device of the device to unregister | |
698 | */ | |
699 | void devm_hwmon_device_unregister(struct device *dev) | |
700 | { | |
701 | WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev)); | |
702 | } | |
703 | EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister); | |
704 | ||
2958b1ec JD |
705 | static void __init hwmon_pci_quirks(void) |
706 | { | |
707 | #if defined CONFIG_X86 && defined CONFIG_PCI | |
708 | struct pci_dev *sb; | |
709 | u16 base; | |
710 | u8 enable; | |
711 | ||
712 | /* Open access to 0x295-0x296 on MSI MS-7031 */ | |
713 | sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL); | |
d6dab7dd JD |
714 | if (sb) { |
715 | if (sb->subsystem_vendor == 0x1462 && /* MSI */ | |
716 | sb->subsystem_device == 0x0031) { /* MS-7031 */ | |
717 | pci_read_config_byte(sb, 0x48, &enable); | |
718 | pci_read_config_word(sb, 0x64, &base); | |
719 | ||
720 | if (base == 0 && !(enable & BIT(2))) { | |
721 | dev_info(&sb->dev, | |
722 | "Opening wide generic port at 0x295\n"); | |
723 | pci_write_config_word(sb, 0x64, 0x295); | |
724 | pci_write_config_byte(sb, 0x48, | |
725 | enable | BIT(2)); | |
726 | } | |
2958b1ec | 727 | } |
d6dab7dd | 728 | pci_dev_put(sb); |
2958b1ec JD |
729 | } |
730 | #endif | |
731 | } | |
732 | ||
1236441f MH |
733 | static int __init hwmon_init(void) |
734 | { | |
bab2243c GR |
735 | int err; |
736 | ||
2958b1ec JD |
737 | hwmon_pci_quirks(); |
738 | ||
bab2243c GR |
739 | err = class_register(&hwmon_class); |
740 | if (err) { | |
741 | pr_err("couldn't register hwmon sysfs class\n"); | |
742 | return err; | |
1236441f MH |
743 | } |
744 | return 0; | |
745 | } | |
746 | ||
747 | static void __exit hwmon_exit(void) | |
748 | { | |
bab2243c | 749 | class_unregister(&hwmon_class); |
1236441f MH |
750 | } |
751 | ||
37f54ee5 | 752 | subsys_initcall(hwmon_init); |
1236441f MH |
753 | module_exit(hwmon_exit); |
754 | ||
1236441f MH |
755 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); |
756 | MODULE_DESCRIPTION("hardware monitoring sysfs/class support"); | |
757 | MODULE_LICENSE("GPL"); | |
758 |