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b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1236441f | 2 | /* |
5ed04880 GR |
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> | |
5ed04880 | 8 | */ |
1236441f | 9 | |
c95df1ae JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
d560168b | 12 | #include <linux/bitops.h> |
1236441f MH |
13 | #include <linux/device.h> |
14 | #include <linux/err.h> | |
8c65b4a6 | 15 | #include <linux/gfp.h> |
c9ebbe6f GR |
16 | #include <linux/hwmon.h> |
17 | #include <linux/idr.h> | |
1597b374 | 18 | #include <linux/list.h> |
c9ebbe6f | 19 | #include <linux/module.h> |
2958b1ec | 20 | #include <linux/pci.h> |
c9ebbe6f | 21 | #include <linux/slab.h> |
648cd48c | 22 | #include <linux/string.h> |
d560168b | 23 | #include <linux/thermal.h> |
1236441f | 24 | |
61b8ab2c NC |
25 | #define CREATE_TRACE_POINTS |
26 | #include <trace/events/hwmon.h> | |
27 | ||
1236441f MH |
28 | #define HWMON_ID_PREFIX "hwmon" |
29 | #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" | |
30 | ||
bab2243c GR |
31 | struct hwmon_device { |
32 | const char *name; | |
33 | struct device dev; | |
d560168b | 34 | const struct hwmon_chip_info *chip; |
1597b374 | 35 | struct list_head tzdata; |
d560168b GR |
36 | struct attribute_group group; |
37 | const struct attribute_group **groups; | |
bab2243c | 38 | }; |
d560168b | 39 | |
bab2243c GR |
40 | #define to_hwmon_device(d) container_of(d, struct hwmon_device, dev) |
41 | ||
3a412d5e GR |
42 | #define MAX_SYSFS_ATTR_NAME_LENGTH 32 |
43 | ||
d560168b GR |
44 | struct hwmon_device_attribute { |
45 | struct device_attribute dev_attr; | |
46 | const struct hwmon_ops *ops; | |
47 | enum hwmon_sensor_types type; | |
48 | u32 attr; | |
49 | int index; | |
3a412d5e | 50 | char name[MAX_SYSFS_ATTR_NAME_LENGTH]; |
d560168b GR |
51 | }; |
52 | ||
53 | #define to_hwmon_attr(d) \ | |
54 | container_of(d, struct hwmon_device_attribute, dev_attr) | |
3bf8bdcf | 55 | #define to_dev_attr(a) container_of(a, struct device_attribute, attr) |
d560168b GR |
56 | |
57 | /* | |
58 | * Thermal zone information | |
d560168b GR |
59 | */ |
60 | struct hwmon_thermal_data { | |
1597b374 | 61 | struct list_head node; /* hwmon tzdata list entry */ |
3bf8bdcf | 62 | struct device *dev; /* Reference to hwmon device */ |
d560168b | 63 | int index; /* sensor index */ |
1597b374 | 64 | struct thermal_zone_device *tzd;/* thermal zone device */ |
d560168b GR |
65 | }; |
66 | ||
bab2243c | 67 | static ssize_t |
2ab0c6c5 | 68 | name_show(struct device *dev, struct device_attribute *attr, char *buf) |
bab2243c GR |
69 | { |
70 | return sprintf(buf, "%s\n", to_hwmon_device(dev)->name); | |
71 | } | |
2ab0c6c5 | 72 | static DEVICE_ATTR_RO(name); |
bab2243c GR |
73 | |
74 | static struct attribute *hwmon_dev_attrs[] = { | |
75 | &dev_attr_name.attr, | |
76 | NULL | |
77 | }; | |
78 | ||
79 | static umode_t hwmon_dev_name_is_visible(struct kobject *kobj, | |
80 | struct attribute *attr, int n) | |
81 | { | |
77d76768 | 82 | struct device *dev = kobj_to_dev(kobj); |
bab2243c GR |
83 | |
84 | if (to_hwmon_device(dev)->name == NULL) | |
85 | return 0; | |
86 | ||
87 | return attr->mode; | |
88 | } | |
89 | ||
524703ac | 90 | static const struct attribute_group hwmon_dev_attr_group = { |
bab2243c GR |
91 | .attrs = hwmon_dev_attrs, |
92 | .is_visible = hwmon_dev_name_is_visible, | |
93 | }; | |
94 | ||
95 | static const struct attribute_group *hwmon_dev_attr_groups[] = { | |
96 | &hwmon_dev_attr_group, | |
97 | NULL | |
98 | }; | |
99 | ||
3bf8bdcf GR |
100 | static void hwmon_free_attrs(struct attribute **attrs) |
101 | { | |
102 | int i; | |
103 | ||
104 | for (i = 0; attrs[i]; i++) { | |
105 | struct device_attribute *dattr = to_dev_attr(attrs[i]); | |
106 | struct hwmon_device_attribute *hattr = to_hwmon_attr(dattr); | |
107 | ||
108 | kfree(hattr); | |
109 | } | |
110 | kfree(attrs); | |
111 | } | |
112 | ||
bab2243c GR |
113 | static void hwmon_dev_release(struct device *dev) |
114 | { | |
3bf8bdcf GR |
115 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
116 | ||
117 | if (hwdev->group.attrs) | |
118 | hwmon_free_attrs(hwdev->group.attrs); | |
119 | kfree(hwdev->groups); | |
120 | kfree(hwdev); | |
bab2243c GR |
121 | } |
122 | ||
123 | static struct class hwmon_class = { | |
124 | .name = "hwmon", | |
125 | .owner = THIS_MODULE, | |
126 | .dev_groups = hwmon_dev_attr_groups, | |
127 | .dev_release = hwmon_dev_release, | |
128 | }; | |
1236441f | 129 | |
4ca5f468 | 130 | static DEFINE_IDA(hwmon_ida); |
1236441f | 131 | |
d560168b GR |
132 | /* Thermal zone handling */ |
133 | ||
86430c1a GR |
134 | /* |
135 | * The complex conditional is necessary to avoid a cyclic dependency | |
136 | * between hwmon and thermal_sys modules. | |
137 | */ | |
f3735332 | 138 | #ifdef CONFIG_THERMAL_OF |
d560168b GR |
139 | static int hwmon_thermal_get_temp(void *data, int *temp) |
140 | { | |
141 | struct hwmon_thermal_data *tdata = data; | |
3bf8bdcf | 142 | struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); |
d560168b GR |
143 | int ret; |
144 | long t; | |
145 | ||
3bf8bdcf | 146 | ret = hwdev->chip->ops->read(tdata->dev, hwmon_temp, hwmon_temp_input, |
d560168b GR |
147 | tdata->index, &t); |
148 | if (ret < 0) | |
149 | return ret; | |
150 | ||
151 | *temp = t; | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
a5f6c0f8 DO |
156 | static int hwmon_thermal_set_trips(void *data, int low, int high) |
157 | { | |
158 | struct hwmon_thermal_data *tdata = data; | |
159 | struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); | |
160 | const struct hwmon_chip_info *chip = hwdev->chip; | |
161 | const struct hwmon_channel_info **info = chip->info; | |
162 | unsigned int i; | |
163 | int err; | |
164 | ||
165 | if (!chip->ops->write) | |
166 | return 0; | |
167 | ||
168 | for (i = 0; info[i] && info[i]->type != hwmon_temp; i++) | |
169 | continue; | |
170 | ||
171 | if (!info[i]) | |
172 | return 0; | |
173 | ||
174 | if (info[i]->config[tdata->index] & HWMON_T_MIN) { | |
175 | err = chip->ops->write(tdata->dev, hwmon_temp, | |
176 | hwmon_temp_min, tdata->index, low); | |
177 | if (err && err != -EOPNOTSUPP) | |
178 | return err; | |
179 | } | |
180 | ||
181 | if (info[i]->config[tdata->index] & HWMON_T_MAX) { | |
182 | err = chip->ops->write(tdata->dev, hwmon_temp, | |
183 | hwmon_temp_max, tdata->index, high); | |
184 | if (err && err != -EOPNOTSUPP) | |
185 | return err; | |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
c9920650 | 191 | static const struct thermal_zone_of_device_ops hwmon_thermal_ops = { |
d560168b | 192 | .get_temp = hwmon_thermal_get_temp, |
a5f6c0f8 | 193 | .set_trips = hwmon_thermal_set_trips, |
d560168b GR |
194 | }; |
195 | ||
1597b374 GR |
196 | static void hwmon_thermal_remove_sensor(void *data) |
197 | { | |
198 | list_del(data); | |
199 | } | |
200 | ||
3bf8bdcf | 201 | static int hwmon_thermal_add_sensor(struct device *dev, int index) |
d560168b | 202 | { |
1597b374 | 203 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
d560168b | 204 | struct hwmon_thermal_data *tdata; |
47c332de | 205 | struct thermal_zone_device *tzd; |
1597b374 | 206 | int err; |
d560168b GR |
207 | |
208 | tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL); | |
209 | if (!tdata) | |
210 | return -ENOMEM; | |
211 | ||
3bf8bdcf | 212 | tdata->dev = dev; |
d560168b GR |
213 | tdata->index = index; |
214 | ||
3bf8bdcf | 215 | tzd = devm_thermal_zone_of_sensor_register(dev, index, tdata, |
47c332de LW |
216 | &hwmon_thermal_ops); |
217 | /* | |
218 | * If CONFIG_THERMAL_OF is disabled, this returns -ENODEV, | |
219 | * so ignore that error but forward any other error. | |
220 | */ | |
221 | if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV)) | |
222 | return PTR_ERR(tzd); | |
d560168b | 223 | |
1597b374 GR |
224 | err = devm_add_action(dev, hwmon_thermal_remove_sensor, &tdata->node); |
225 | if (err) | |
226 | return err; | |
227 | ||
228 | tdata->tzd = tzd; | |
229 | list_add(&tdata->node, &hwdev->tzdata); | |
230 | ||
d560168b GR |
231 | return 0; |
232 | } | |
44e3ad88 AM |
233 | |
234 | static int hwmon_thermal_register_sensors(struct device *dev) | |
235 | { | |
236 | struct hwmon_device *hwdev = to_hwmon_device(dev); | |
237 | const struct hwmon_chip_info *chip = hwdev->chip; | |
238 | const struct hwmon_channel_info **info = chip->info; | |
239 | void *drvdata = dev_get_drvdata(dev); | |
240 | int i; | |
241 | ||
242 | for (i = 1; info[i]; i++) { | |
243 | int j; | |
244 | ||
245 | if (info[i]->type != hwmon_temp) | |
246 | continue; | |
247 | ||
248 | for (j = 0; info[i]->config[j]; j++) { | |
249 | int err; | |
250 | ||
251 | if (!(info[i]->config[j] & HWMON_T_INPUT) || | |
252 | !chip->ops->is_visible(drvdata, hwmon_temp, | |
253 | hwmon_temp_input, j)) | |
254 | continue; | |
255 | ||
256 | err = hwmon_thermal_add_sensor(dev, j); | |
257 | if (err) | |
258 | return err; | |
259 | } | |
260 | } | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
1597b374 GR |
265 | static void hwmon_thermal_notify(struct device *dev, int index) |
266 | { | |
267 | struct hwmon_device *hwdev = to_hwmon_device(dev); | |
268 | struct hwmon_thermal_data *tzdata; | |
269 | ||
270 | list_for_each_entry(tzdata, &hwdev->tzdata, node) { | |
271 | if (tzdata->index == index) { | |
272 | thermal_zone_device_update(tzdata->tzd, | |
273 | THERMAL_EVENT_UNSPECIFIED); | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
d560168b | 278 | #else |
44e3ad88 | 279 | static int hwmon_thermal_register_sensors(struct device *dev) |
d560168b GR |
280 | { |
281 | return 0; | |
282 | } | |
1597b374 GR |
283 | |
284 | static void hwmon_thermal_notify(struct device *dev, int index) { } | |
285 | ||
86430c1a | 286 | #endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */ |
d560168b | 287 | |
61b8ab2c NC |
288 | static int hwmon_attr_base(enum hwmon_sensor_types type) |
289 | { | |
4413405f | 290 | if (type == hwmon_in || type == hwmon_intrusion) |
61b8ab2c NC |
291 | return 0; |
292 | return 1; | |
293 | } | |
294 | ||
d560168b GR |
295 | /* sysfs attribute management */ |
296 | ||
297 | static ssize_t hwmon_attr_show(struct device *dev, | |
298 | struct device_attribute *devattr, char *buf) | |
299 | { | |
300 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
301 | long val; | |
302 | int ret; | |
303 | ||
304 | ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index, | |
305 | &val); | |
306 | if (ret < 0) | |
307 | return ret; | |
308 | ||
61b8ab2c NC |
309 | trace_hwmon_attr_show(hattr->index + hwmon_attr_base(hattr->type), |
310 | hattr->name, val); | |
311 | ||
d560168b GR |
312 | return sprintf(buf, "%ld\n", val); |
313 | } | |
314 | ||
e159ab5c GR |
315 | static ssize_t hwmon_attr_show_string(struct device *dev, |
316 | struct device_attribute *devattr, | |
317 | char *buf) | |
318 | { | |
319 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
61b8ab2c | 320 | enum hwmon_sensor_types type = hattr->type; |
5ba6bcbc | 321 | const char *s; |
e159ab5c GR |
322 | int ret; |
323 | ||
324 | ret = hattr->ops->read_string(dev, hattr->type, hattr->attr, | |
325 | hattr->index, &s); | |
326 | if (ret < 0) | |
327 | return ret; | |
328 | ||
61b8ab2c NC |
329 | trace_hwmon_attr_show_string(hattr->index + hwmon_attr_base(type), |
330 | hattr->name, s); | |
331 | ||
e159ab5c GR |
332 | return sprintf(buf, "%s\n", s); |
333 | } | |
334 | ||
d560168b GR |
335 | static ssize_t hwmon_attr_store(struct device *dev, |
336 | struct device_attribute *devattr, | |
337 | const char *buf, size_t count) | |
338 | { | |
339 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
340 | long val; | |
341 | int ret; | |
342 | ||
343 | ret = kstrtol(buf, 10, &val); | |
344 | if (ret < 0) | |
345 | return ret; | |
346 | ||
347 | ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index, | |
348 | val); | |
349 | if (ret < 0) | |
350 | return ret; | |
351 | ||
61b8ab2c NC |
352 | trace_hwmon_attr_store(hattr->index + hwmon_attr_base(hattr->type), |
353 | hattr->name, val); | |
d560168b | 354 | |
61b8ab2c | 355 | return count; |
d560168b GR |
356 | } |
357 | ||
e159ab5c GR |
358 | static bool is_string_attr(enum hwmon_sensor_types type, u32 attr) |
359 | { | |
360 | return (type == hwmon_temp && attr == hwmon_temp_label) || | |
361 | (type == hwmon_in && attr == hwmon_in_label) || | |
362 | (type == hwmon_curr && attr == hwmon_curr_label) || | |
363 | (type == hwmon_power && attr == hwmon_power_label) || | |
364 | (type == hwmon_energy && attr == hwmon_energy_label) || | |
365 | (type == hwmon_humidity && attr == hwmon_humidity_label) || | |
366 | (type == hwmon_fan && attr == hwmon_fan_label); | |
367 | } | |
368 | ||
3bf8bdcf | 369 | static struct attribute *hwmon_genattr(const void *drvdata, |
d560168b GR |
370 | enum hwmon_sensor_types type, |
371 | u32 attr, | |
372 | int index, | |
373 | const char *template, | |
374 | const struct hwmon_ops *ops) | |
375 | { | |
376 | struct hwmon_device_attribute *hattr; | |
377 | struct device_attribute *dattr; | |
378 | struct attribute *a; | |
379 | umode_t mode; | |
3b443def | 380 | const char *name; |
e159ab5c | 381 | bool is_string = is_string_attr(type, attr); |
d560168b GR |
382 | |
383 | /* The attribute is invisible if there is no template string */ | |
384 | if (!template) | |
385 | return ERR_PTR(-ENOENT); | |
386 | ||
387 | mode = ops->is_visible(drvdata, type, attr, index); | |
388 | if (!mode) | |
389 | return ERR_PTR(-ENOENT); | |
390 | ||
0d87116f | 391 | if ((mode & 0444) && ((is_string && !ops->read_string) || |
e159ab5c | 392 | (!is_string && !ops->read))) |
d560168b | 393 | return ERR_PTR(-EINVAL); |
0d87116f | 394 | if ((mode & 0222) && !ops->write) |
d560168b GR |
395 | return ERR_PTR(-EINVAL); |
396 | ||
3bf8bdcf | 397 | hattr = kzalloc(sizeof(*hattr), GFP_KERNEL); |
3a412d5e GR |
398 | if (!hattr) |
399 | return ERR_PTR(-ENOMEM); | |
400 | ||
d560168b | 401 | if (type == hwmon_chip) { |
3b443def | 402 | name = template; |
d560168b | 403 | } else { |
3a412d5e | 404 | scnprintf(hattr->name, sizeof(hattr->name), template, |
d560168b | 405 | index + hwmon_attr_base(type)); |
3a412d5e | 406 | name = hattr->name; |
d560168b GR |
407 | } |
408 | ||
d560168b GR |
409 | hattr->type = type; |
410 | hattr->attr = attr; | |
411 | hattr->index = index; | |
412 | hattr->ops = ops; | |
413 | ||
414 | dattr = &hattr->dev_attr; | |
e159ab5c | 415 | dattr->show = is_string ? hwmon_attr_show_string : hwmon_attr_show; |
d560168b GR |
416 | dattr->store = hwmon_attr_store; |
417 | ||
418 | a = &dattr->attr; | |
419 | sysfs_attr_init(a); | |
420 | a->name = name; | |
421 | a->mode = mode; | |
422 | ||
423 | return a; | |
424 | } | |
425 | ||
f4d325d5 GR |
426 | /* |
427 | * Chip attributes are not attribute templates but actual sysfs attributes. | |
428 | * See hwmon_genattr() for special handling. | |
429 | */ | |
430 | static const char * const hwmon_chip_attrs[] = { | |
d560168b | 431 | [hwmon_chip_temp_reset_history] = "temp_reset_history", |
00d616cf | 432 | [hwmon_chip_in_reset_history] = "in_reset_history", |
9b26947c | 433 | [hwmon_chip_curr_reset_history] = "curr_reset_history", |
b308f5c7 | 434 | [hwmon_chip_power_reset_history] = "power_reset_history", |
d560168b GR |
435 | [hwmon_chip_update_interval] = "update_interval", |
436 | [hwmon_chip_alarms] = "alarms", | |
9f00995e GR |
437 | [hwmon_chip_samples] = "samples", |
438 | [hwmon_chip_curr_samples] = "curr_samples", | |
439 | [hwmon_chip_in_samples] = "in_samples", | |
440 | [hwmon_chip_power_samples] = "power_samples", | |
441 | [hwmon_chip_temp_samples] = "temp_samples", | |
d560168b GR |
442 | }; |
443 | ||
444 | static const char * const hwmon_temp_attr_templates[] = { | |
002c6b54 | 445 | [hwmon_temp_enable] = "temp%d_enable", |
d560168b GR |
446 | [hwmon_temp_input] = "temp%d_input", |
447 | [hwmon_temp_type] = "temp%d_type", | |
448 | [hwmon_temp_lcrit] = "temp%d_lcrit", | |
449 | [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst", | |
450 | [hwmon_temp_min] = "temp%d_min", | |
451 | [hwmon_temp_min_hyst] = "temp%d_min_hyst", | |
452 | [hwmon_temp_max] = "temp%d_max", | |
453 | [hwmon_temp_max_hyst] = "temp%d_max_hyst", | |
454 | [hwmon_temp_crit] = "temp%d_crit", | |
455 | [hwmon_temp_crit_hyst] = "temp%d_crit_hyst", | |
456 | [hwmon_temp_emergency] = "temp%d_emergency", | |
457 | [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst", | |
458 | [hwmon_temp_alarm] = "temp%d_alarm", | |
459 | [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm", | |
460 | [hwmon_temp_min_alarm] = "temp%d_min_alarm", | |
461 | [hwmon_temp_max_alarm] = "temp%d_max_alarm", | |
462 | [hwmon_temp_crit_alarm] = "temp%d_crit_alarm", | |
463 | [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm", | |
464 | [hwmon_temp_fault] = "temp%d_fault", | |
465 | [hwmon_temp_offset] = "temp%d_offset", | |
466 | [hwmon_temp_label] = "temp%d_label", | |
467 | [hwmon_temp_lowest] = "temp%d_lowest", | |
468 | [hwmon_temp_highest] = "temp%d_highest", | |
469 | [hwmon_temp_reset_history] = "temp%d_reset_history", | |
1967f712 ZL |
470 | [hwmon_temp_rated_min] = "temp%d_rated_min", |
471 | [hwmon_temp_rated_max] = "temp%d_rated_max", | |
d560168b GR |
472 | }; |
473 | ||
00d616cf | 474 | static const char * const hwmon_in_attr_templates[] = { |
002c6b54 | 475 | [hwmon_in_enable] = "in%d_enable", |
00d616cf GR |
476 | [hwmon_in_input] = "in%d_input", |
477 | [hwmon_in_min] = "in%d_min", | |
478 | [hwmon_in_max] = "in%d_max", | |
479 | [hwmon_in_lcrit] = "in%d_lcrit", | |
480 | [hwmon_in_crit] = "in%d_crit", | |
481 | [hwmon_in_average] = "in%d_average", | |
482 | [hwmon_in_lowest] = "in%d_lowest", | |
483 | [hwmon_in_highest] = "in%d_highest", | |
484 | [hwmon_in_reset_history] = "in%d_reset_history", | |
485 | [hwmon_in_label] = "in%d_label", | |
486 | [hwmon_in_alarm] = "in%d_alarm", | |
487 | [hwmon_in_min_alarm] = "in%d_min_alarm", | |
488 | [hwmon_in_max_alarm] = "in%d_max_alarm", | |
489 | [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm", | |
490 | [hwmon_in_crit_alarm] = "in%d_crit_alarm", | |
1967f712 ZL |
491 | [hwmon_in_rated_min] = "in%d_rated_min", |
492 | [hwmon_in_rated_max] = "in%d_rated_max", | |
00d616cf GR |
493 | }; |
494 | ||
9b26947c | 495 | static const char * const hwmon_curr_attr_templates[] = { |
002c6b54 | 496 | [hwmon_curr_enable] = "curr%d_enable", |
9b26947c GR |
497 | [hwmon_curr_input] = "curr%d_input", |
498 | [hwmon_curr_min] = "curr%d_min", | |
499 | [hwmon_curr_max] = "curr%d_max", | |
500 | [hwmon_curr_lcrit] = "curr%d_lcrit", | |
501 | [hwmon_curr_crit] = "curr%d_crit", | |
502 | [hwmon_curr_average] = "curr%d_average", | |
503 | [hwmon_curr_lowest] = "curr%d_lowest", | |
504 | [hwmon_curr_highest] = "curr%d_highest", | |
505 | [hwmon_curr_reset_history] = "curr%d_reset_history", | |
506 | [hwmon_curr_label] = "curr%d_label", | |
507 | [hwmon_curr_alarm] = "curr%d_alarm", | |
508 | [hwmon_curr_min_alarm] = "curr%d_min_alarm", | |
509 | [hwmon_curr_max_alarm] = "curr%d_max_alarm", | |
510 | [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm", | |
511 | [hwmon_curr_crit_alarm] = "curr%d_crit_alarm", | |
1967f712 ZL |
512 | [hwmon_curr_rated_min] = "curr%d_rated_min", |
513 | [hwmon_curr_rated_max] = "curr%d_rated_max", | |
9b26947c GR |
514 | }; |
515 | ||
b308f5c7 | 516 | static const char * const hwmon_power_attr_templates[] = { |
002c6b54 | 517 | [hwmon_power_enable] = "power%d_enable", |
b308f5c7 GR |
518 | [hwmon_power_average] = "power%d_average", |
519 | [hwmon_power_average_interval] = "power%d_average_interval", | |
520 | [hwmon_power_average_interval_max] = "power%d_interval_max", | |
521 | [hwmon_power_average_interval_min] = "power%d_interval_min", | |
522 | [hwmon_power_average_highest] = "power%d_average_highest", | |
523 | [hwmon_power_average_lowest] = "power%d_average_lowest", | |
524 | [hwmon_power_average_max] = "power%d_average_max", | |
525 | [hwmon_power_average_min] = "power%d_average_min", | |
526 | [hwmon_power_input] = "power%d_input", | |
527 | [hwmon_power_input_highest] = "power%d_input_highest", | |
528 | [hwmon_power_input_lowest] = "power%d_input_lowest", | |
529 | [hwmon_power_reset_history] = "power%d_reset_history", | |
530 | [hwmon_power_accuracy] = "power%d_accuracy", | |
531 | [hwmon_power_cap] = "power%d_cap", | |
532 | [hwmon_power_cap_hyst] = "power%d_cap_hyst", | |
533 | [hwmon_power_cap_max] = "power%d_cap_max", | |
534 | [hwmon_power_cap_min] = "power%d_cap_min", | |
aa7f29b0 | 535 | [hwmon_power_min] = "power%d_min", |
b308f5c7 | 536 | [hwmon_power_max] = "power%d_max", |
aa7f29b0 | 537 | [hwmon_power_lcrit] = "power%d_lcrit", |
b308f5c7 GR |
538 | [hwmon_power_crit] = "power%d_crit", |
539 | [hwmon_power_label] = "power%d_label", | |
540 | [hwmon_power_alarm] = "power%d_alarm", | |
541 | [hwmon_power_cap_alarm] = "power%d_cap_alarm", | |
aa7f29b0 | 542 | [hwmon_power_min_alarm] = "power%d_min_alarm", |
b308f5c7 | 543 | [hwmon_power_max_alarm] = "power%d_max_alarm", |
aa7f29b0 | 544 | [hwmon_power_lcrit_alarm] = "power%d_lcrit_alarm", |
b308f5c7 | 545 | [hwmon_power_crit_alarm] = "power%d_crit_alarm", |
1967f712 ZL |
546 | [hwmon_power_rated_min] = "power%d_rated_min", |
547 | [hwmon_power_rated_max] = "power%d_rated_max", | |
b308f5c7 GR |
548 | }; |
549 | ||
6bfcca44 | 550 | static const char * const hwmon_energy_attr_templates[] = { |
002c6b54 | 551 | [hwmon_energy_enable] = "energy%d_enable", |
6bfcca44 GR |
552 | [hwmon_energy_input] = "energy%d_input", |
553 | [hwmon_energy_label] = "energy%d_label", | |
554 | }; | |
555 | ||
556 | static const char * const hwmon_humidity_attr_templates[] = { | |
002c6b54 | 557 | [hwmon_humidity_enable] = "humidity%d_enable", |
6bfcca44 GR |
558 | [hwmon_humidity_input] = "humidity%d_input", |
559 | [hwmon_humidity_label] = "humidity%d_label", | |
560 | [hwmon_humidity_min] = "humidity%d_min", | |
561 | [hwmon_humidity_min_hyst] = "humidity%d_min_hyst", | |
562 | [hwmon_humidity_max] = "humidity%d_max", | |
563 | [hwmon_humidity_max_hyst] = "humidity%d_max_hyst", | |
564 | [hwmon_humidity_alarm] = "humidity%d_alarm", | |
565 | [hwmon_humidity_fault] = "humidity%d_fault", | |
1967f712 ZL |
566 | [hwmon_humidity_rated_min] = "humidity%d_rated_min", |
567 | [hwmon_humidity_rated_max] = "humidity%d_rated_max", | |
6bfcca44 GR |
568 | }; |
569 | ||
8faee73f | 570 | static const char * const hwmon_fan_attr_templates[] = { |
002c6b54 | 571 | [hwmon_fan_enable] = "fan%d_enable", |
8faee73f GR |
572 | [hwmon_fan_input] = "fan%d_input", |
573 | [hwmon_fan_label] = "fan%d_label", | |
574 | [hwmon_fan_min] = "fan%d_min", | |
575 | [hwmon_fan_max] = "fan%d_max", | |
576 | [hwmon_fan_div] = "fan%d_div", | |
577 | [hwmon_fan_pulses] = "fan%d_pulses", | |
578 | [hwmon_fan_target] = "fan%d_target", | |
579 | [hwmon_fan_alarm] = "fan%d_alarm", | |
580 | [hwmon_fan_min_alarm] = "fan%d_min_alarm", | |
581 | [hwmon_fan_max_alarm] = "fan%d_max_alarm", | |
582 | [hwmon_fan_fault] = "fan%d_fault", | |
583 | }; | |
584 | ||
f9f7bb3a GR |
585 | static const char * const hwmon_pwm_attr_templates[] = { |
586 | [hwmon_pwm_input] = "pwm%d", | |
587 | [hwmon_pwm_enable] = "pwm%d_enable", | |
588 | [hwmon_pwm_mode] = "pwm%d_mode", | |
589 | [hwmon_pwm_freq] = "pwm%d_freq", | |
590 | }; | |
591 | ||
4413405f DDAG |
592 | static const char * const hwmon_intrusion_attr_templates[] = { |
593 | [hwmon_intrusion_alarm] = "intrusion%d_alarm", | |
594 | [hwmon_intrusion_beep] = "intrusion%d_beep", | |
595 | }; | |
596 | ||
d560168b | 597 | static const char * const *__templates[] = { |
f4d325d5 | 598 | [hwmon_chip] = hwmon_chip_attrs, |
d560168b | 599 | [hwmon_temp] = hwmon_temp_attr_templates, |
00d616cf | 600 | [hwmon_in] = hwmon_in_attr_templates, |
9b26947c | 601 | [hwmon_curr] = hwmon_curr_attr_templates, |
b308f5c7 | 602 | [hwmon_power] = hwmon_power_attr_templates, |
6bfcca44 GR |
603 | [hwmon_energy] = hwmon_energy_attr_templates, |
604 | [hwmon_humidity] = hwmon_humidity_attr_templates, | |
8faee73f | 605 | [hwmon_fan] = hwmon_fan_attr_templates, |
f9f7bb3a | 606 | [hwmon_pwm] = hwmon_pwm_attr_templates, |
4413405f | 607 | [hwmon_intrusion] = hwmon_intrusion_attr_templates, |
d560168b GR |
608 | }; |
609 | ||
610 | static const int __templates_size[] = { | |
f4d325d5 | 611 | [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attrs), |
d560168b | 612 | [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates), |
00d616cf | 613 | [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates), |
9b26947c | 614 | [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates), |
b308f5c7 | 615 | [hwmon_power] = ARRAY_SIZE(hwmon_power_attr_templates), |
6bfcca44 GR |
616 | [hwmon_energy] = ARRAY_SIZE(hwmon_energy_attr_templates), |
617 | [hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates), | |
8faee73f | 618 | [hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates), |
f9f7bb3a | 619 | [hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates), |
4413405f | 620 | [hwmon_intrusion] = ARRAY_SIZE(hwmon_intrusion_attr_templates), |
d560168b GR |
621 | }; |
622 | ||
1597b374 GR |
623 | int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, |
624 | u32 attr, int channel) | |
625 | { | |
626 | char sattr[MAX_SYSFS_ATTR_NAME_LENGTH]; | |
627 | const char * const *templates; | |
628 | const char *template; | |
629 | int base; | |
630 | ||
631 | if (type >= ARRAY_SIZE(__templates)) | |
632 | return -EINVAL; | |
633 | if (attr >= __templates_size[type]) | |
634 | return -EINVAL; | |
635 | ||
636 | templates = __templates[type]; | |
637 | template = templates[attr]; | |
638 | ||
639 | base = hwmon_attr_base(type); | |
640 | ||
641 | scnprintf(sattr, MAX_SYSFS_ATTR_NAME_LENGTH, template, base + channel); | |
642 | sysfs_notify(&dev->kobj, NULL, sattr); | |
643 | kobject_uevent(&dev->kobj, KOBJ_CHANGE); | |
644 | ||
645 | if (type == hwmon_temp) | |
646 | hwmon_thermal_notify(dev, channel); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | EXPORT_SYMBOL_GPL(hwmon_notify_event); | |
651 | ||
d560168b GR |
652 | static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info) |
653 | { | |
654 | int i, n; | |
655 | ||
656 | for (i = n = 0; info->config[i]; i++) | |
657 | n += hweight32(info->config[i]); | |
658 | ||
659 | return n; | |
660 | } | |
661 | ||
3bf8bdcf | 662 | static int hwmon_genattrs(const void *drvdata, |
d560168b GR |
663 | struct attribute **attrs, |
664 | const struct hwmon_ops *ops, | |
665 | const struct hwmon_channel_info *info) | |
666 | { | |
667 | const char * const *templates; | |
668 | int template_size; | |
669 | int i, aindex = 0; | |
670 | ||
671 | if (info->type >= ARRAY_SIZE(__templates)) | |
672 | return -EINVAL; | |
673 | ||
674 | templates = __templates[info->type]; | |
675 | template_size = __templates_size[info->type]; | |
676 | ||
677 | for (i = 0; info->config[i]; i++) { | |
678 | u32 attr_mask = info->config[i]; | |
679 | u32 attr; | |
680 | ||
681 | while (attr_mask) { | |
682 | struct attribute *a; | |
683 | ||
684 | attr = __ffs(attr_mask); | |
685 | attr_mask &= ~BIT(attr); | |
686 | if (attr >= template_size) | |
687 | return -EINVAL; | |
3bf8bdcf | 688 | a = hwmon_genattr(drvdata, info->type, attr, i, |
d560168b GR |
689 | templates[attr], ops); |
690 | if (IS_ERR(a)) { | |
691 | if (PTR_ERR(a) != -ENOENT) | |
692 | return PTR_ERR(a); | |
693 | continue; | |
694 | } | |
695 | attrs[aindex++] = a; | |
696 | } | |
697 | } | |
698 | return aindex; | |
699 | } | |
700 | ||
701 | static struct attribute ** | |
3bf8bdcf | 702 | __hwmon_create_attrs(const void *drvdata, const struct hwmon_chip_info *chip) |
d560168b GR |
703 | { |
704 | int ret, i, aindex = 0, nattrs = 0; | |
705 | struct attribute **attrs; | |
706 | ||
707 | for (i = 0; chip->info[i]; i++) | |
708 | nattrs += hwmon_num_channel_attrs(chip->info[i]); | |
709 | ||
710 | if (nattrs == 0) | |
711 | return ERR_PTR(-EINVAL); | |
712 | ||
3bf8bdcf | 713 | attrs = kcalloc(nattrs + 1, sizeof(*attrs), GFP_KERNEL); |
d560168b GR |
714 | if (!attrs) |
715 | return ERR_PTR(-ENOMEM); | |
716 | ||
717 | for (i = 0; chip->info[i]; i++) { | |
3bf8bdcf | 718 | ret = hwmon_genattrs(drvdata, &attrs[aindex], chip->ops, |
d560168b | 719 | chip->info[i]); |
3bf8bdcf GR |
720 | if (ret < 0) { |
721 | hwmon_free_attrs(attrs); | |
d560168b | 722 | return ERR_PTR(ret); |
3bf8bdcf | 723 | } |
d560168b GR |
724 | aindex += ret; |
725 | } | |
726 | ||
727 | return attrs; | |
728 | } | |
729 | ||
730 | static struct device * | |
731 | __hwmon_device_register(struct device *dev, const char *name, void *drvdata, | |
732 | const struct hwmon_chip_info *chip, | |
733 | const struct attribute_group **groups) | |
1236441f | 734 | { |
bab2243c | 735 | struct hwmon_device *hwdev; |
d560168b | 736 | struct device *hdev; |
44e3ad88 | 737 | int i, err, id; |
ded2b666 | 738 | |
74d3b641 | 739 | /* Complain about invalid characters in hwmon name attribute */ |
648cd48c | 740 | if (name && (!strlen(name) || strpbrk(name, "-* \t\n"))) |
74d3b641 GR |
741 | dev_warn(dev, |
742 | "hwmon: '%s' is not a valid name attribute, please fix\n", | |
743 | name); | |
648cd48c | 744 | |
4ca5f468 JC |
745 | id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL); |
746 | if (id < 0) | |
747 | return ERR_PTR(id); | |
1236441f | 748 | |
bab2243c GR |
749 | hwdev = kzalloc(sizeof(*hwdev), GFP_KERNEL); |
750 | if (hwdev == NULL) { | |
751 | err = -ENOMEM; | |
752 | goto ida_remove; | |
753 | } | |
1236441f | 754 | |
d560168b GR |
755 | hdev = &hwdev->dev; |
756 | ||
239552f4 | 757 | if (chip) { |
d560168b | 758 | struct attribute **attrs; |
b2a4cc3a | 759 | int ngroups = 2; /* terminating NULL plus &hwdev->groups */ |
d560168b GR |
760 | |
761 | if (groups) | |
762 | for (i = 0; groups[i]; i++) | |
763 | ngroups++; | |
764 | ||
3bf8bdcf | 765 | hwdev->groups = kcalloc(ngroups, sizeof(*groups), GFP_KERNEL); |
38d8ed65 CIK |
766 | if (!hwdev->groups) { |
767 | err = -ENOMEM; | |
768 | goto free_hwmon; | |
769 | } | |
d560168b | 770 | |
3bf8bdcf | 771 | attrs = __hwmon_create_attrs(drvdata, chip); |
d560168b GR |
772 | if (IS_ERR(attrs)) { |
773 | err = PTR_ERR(attrs); | |
774 | goto free_hwmon; | |
775 | } | |
776 | ||
777 | hwdev->group.attrs = attrs; | |
778 | ngroups = 0; | |
779 | hwdev->groups[ngroups++] = &hwdev->group; | |
780 | ||
781 | if (groups) { | |
782 | for (i = 0; groups[i]; i++) | |
783 | hwdev->groups[ngroups++] = groups[i]; | |
784 | } | |
785 | ||
786 | hdev->groups = hwdev->groups; | |
787 | } else { | |
788 | hdev->groups = groups; | |
789 | } | |
790 | ||
bab2243c | 791 | hwdev->name = name; |
d560168b GR |
792 | hdev->class = &hwmon_class; |
793 | hdev->parent = dev; | |
794 | hdev->of_node = dev ? dev->of_node : NULL; | |
795 | hwdev->chip = chip; | |
796 | dev_set_drvdata(hdev, drvdata); | |
797 | dev_set_name(hdev, HWMON_ID_FORMAT, id); | |
798 | err = device_register(hdev); | |
bab2243c | 799 | if (err) |
d560168b GR |
800 | goto free_hwmon; |
801 | ||
1597b374 GR |
802 | INIT_LIST_HEAD(&hwdev->tzdata); |
803 | ||
c41dd48e | 804 | if (dev && dev->of_node && chip && chip->ops->read && |
d560168b GR |
805 | chip->info[0]->type == hwmon_chip && |
806 | (chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) { | |
44e3ad88 AM |
807 | err = hwmon_thermal_register_sensors(hdev); |
808 | if (err) { | |
809 | device_unregister(hdev); | |
810 | /* | |
811 | * Don't worry about hwdev; hwmon_dev_release(), called | |
812 | * from device_unregister(), will free it. | |
813 | */ | |
814 | goto ida_remove; | |
d560168b GR |
815 | } |
816 | } | |
bab2243c | 817 | |
d560168b | 818 | return hdev; |
bab2243c | 819 | |
d560168b | 820 | free_hwmon: |
3bf8bdcf | 821 | hwmon_dev_release(hdev); |
bab2243c GR |
822 | ida_remove: |
823 | ida_simple_remove(&hwmon_ida, id); | |
824 | return ERR_PTR(err); | |
825 | } | |
d560168b GR |
826 | |
827 | /** | |
828 | * hwmon_device_register_with_groups - register w/ hwmon | |
829 | * @dev: the parent device | |
830 | * @name: hwmon name attribute | |
831 | * @drvdata: driver data to attach to created device | |
832 | * @groups: List of attribute groups to create | |
833 | * | |
834 | * hwmon_device_unregister() must be called when the device is no | |
835 | * longer needed. | |
836 | * | |
837 | * Returns the pointer to the new device. | |
838 | */ | |
839 | struct device * | |
840 | hwmon_device_register_with_groups(struct device *dev, const char *name, | |
841 | void *drvdata, | |
842 | const struct attribute_group **groups) | |
843 | { | |
8353863a GR |
844 | if (!name) |
845 | return ERR_PTR(-EINVAL); | |
846 | ||
d560168b GR |
847 | return __hwmon_device_register(dev, name, drvdata, NULL, groups); |
848 | } | |
bab2243c | 849 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups); |
1236441f | 850 | |
d560168b GR |
851 | /** |
852 | * hwmon_device_register_with_info - register w/ hwmon | |
853 | * @dev: the parent device | |
854 | * @name: hwmon name attribute | |
855 | * @drvdata: driver data to attach to created device | |
3870945a | 856 | * @chip: pointer to hwmon chip information |
848ba0a2 | 857 | * @extra_groups: pointer to list of additional non-standard attribute groups |
d560168b GR |
858 | * |
859 | * hwmon_device_unregister() must be called when the device is no | |
860 | * longer needed. | |
861 | * | |
862 | * Returns the pointer to the new device. | |
863 | */ | |
864 | struct device * | |
865 | hwmon_device_register_with_info(struct device *dev, const char *name, | |
866 | void *drvdata, | |
867 | const struct hwmon_chip_info *chip, | |
848ba0a2 | 868 | const struct attribute_group **extra_groups) |
d560168b | 869 | { |
8353863a GR |
870 | if (!name) |
871 | return ERR_PTR(-EINVAL); | |
872 | ||
239552f4 | 873 | if (chip && (!chip->ops || !chip->ops->is_visible || !chip->info)) |
d560168b GR |
874 | return ERR_PTR(-EINVAL); |
875 | ||
59df4f4e LM |
876 | if (chip && !dev) |
877 | return ERR_PTR(-EINVAL); | |
878 | ||
848ba0a2 | 879 | return __hwmon_device_register(dev, name, drvdata, chip, extra_groups); |
d560168b GR |
880 | } |
881 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_info); | |
882 | ||
bab2243c GR |
883 | /** |
884 | * hwmon_device_register - register w/ hwmon | |
885 | * @dev: the device to register | |
886 | * | |
887 | * hwmon_device_unregister() must be called when the device is no | |
888 | * longer needed. | |
889 | * | |
890 | * Returns the pointer to the new device. | |
891 | */ | |
892 | struct device *hwmon_device_register(struct device *dev) | |
893 | { | |
af1bd36c GR |
894 | dev_warn(dev, |
895 | "hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().\n"); | |
896 | ||
8353863a | 897 | return __hwmon_device_register(dev, NULL, NULL, NULL, NULL); |
1236441f | 898 | } |
839a9eef | 899 | EXPORT_SYMBOL_GPL(hwmon_device_register); |
1236441f MH |
900 | |
901 | /** | |
902 | * hwmon_device_unregister - removes the previously registered class device | |
903 | * | |
1beeffe4 | 904 | * @dev: the class device to destroy |
1236441f | 905 | */ |
1beeffe4 | 906 | void hwmon_device_unregister(struct device *dev) |
1236441f MH |
907 | { |
908 | int id; | |
909 | ||
739cf3a2 | 910 | if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { |
1beeffe4 | 911 | device_unregister(dev); |
4ca5f468 | 912 | ida_simple_remove(&hwmon_ida, id); |
1236441f | 913 | } else |
1beeffe4 | 914 | dev_dbg(dev->parent, |
1236441f MH |
915 | "hwmon_device_unregister() failed: bad class ID!\n"); |
916 | } | |
839a9eef | 917 | EXPORT_SYMBOL_GPL(hwmon_device_unregister); |
1236441f | 918 | |
74188cba GR |
919 | static void devm_hwmon_release(struct device *dev, void *res) |
920 | { | |
921 | struct device *hwdev = *(struct device **)res; | |
922 | ||
923 | hwmon_device_unregister(hwdev); | |
924 | } | |
925 | ||
926 | /** | |
927 | * devm_hwmon_device_register_with_groups - register w/ hwmon | |
928 | * @dev: the parent device | |
929 | * @name: hwmon name attribute | |
930 | * @drvdata: driver data to attach to created device | |
931 | * @groups: List of attribute groups to create | |
932 | * | |
933 | * Returns the pointer to the new device. The new device is automatically | |
934 | * unregistered with the parent device. | |
935 | */ | |
936 | struct device * | |
937 | devm_hwmon_device_register_with_groups(struct device *dev, const char *name, | |
938 | void *drvdata, | |
939 | const struct attribute_group **groups) | |
940 | { | |
941 | struct device **ptr, *hwdev; | |
942 | ||
943 | if (!dev) | |
944 | return ERR_PTR(-EINVAL); | |
945 | ||
946 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); | |
947 | if (!ptr) | |
948 | return ERR_PTR(-ENOMEM); | |
949 | ||
950 | hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups); | |
951 | if (IS_ERR(hwdev)) | |
952 | goto error; | |
953 | ||
954 | *ptr = hwdev; | |
955 | devres_add(dev, ptr); | |
956 | return hwdev; | |
957 | ||
958 | error: | |
959 | devres_free(ptr); | |
960 | return hwdev; | |
961 | } | |
962 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups); | |
963 | ||
d560168b GR |
964 | /** |
965 | * devm_hwmon_device_register_with_info - register w/ hwmon | |
3870945a GR |
966 | * @dev: the parent device |
967 | * @name: hwmon name attribute | |
968 | * @drvdata: driver data to attach to created device | |
969 | * @chip: pointer to hwmon chip information | |
970 | * @groups: pointer to list of driver specific attribute groups | |
d560168b GR |
971 | * |
972 | * Returns the pointer to the new device. The new device is automatically | |
973 | * unregistered with the parent device. | |
974 | */ | |
975 | struct device * | |
976 | devm_hwmon_device_register_with_info(struct device *dev, const char *name, | |
977 | void *drvdata, | |
978 | const struct hwmon_chip_info *chip, | |
979 | const struct attribute_group **groups) | |
980 | { | |
981 | struct device **ptr, *hwdev; | |
982 | ||
983 | if (!dev) | |
984 | return ERR_PTR(-EINVAL); | |
985 | ||
986 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); | |
987 | if (!ptr) | |
988 | return ERR_PTR(-ENOMEM); | |
989 | ||
990 | hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip, | |
991 | groups); | |
992 | if (IS_ERR(hwdev)) | |
993 | goto error; | |
994 | ||
995 | *ptr = hwdev; | |
996 | devres_add(dev, ptr); | |
997 | ||
998 | return hwdev; | |
999 | ||
1000 | error: | |
1001 | devres_free(ptr); | |
1002 | return hwdev; | |
1003 | } | |
1004 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info); | |
1005 | ||
74188cba GR |
1006 | static int devm_hwmon_match(struct device *dev, void *res, void *data) |
1007 | { | |
1008 | struct device **hwdev = res; | |
1009 | ||
1010 | return *hwdev == data; | |
1011 | } | |
1012 | ||
1013 | /** | |
1014 | * devm_hwmon_device_unregister - removes a previously registered hwmon device | |
1015 | * | |
1016 | * @dev: the parent device of the device to unregister | |
1017 | */ | |
1018 | void devm_hwmon_device_unregister(struct device *dev) | |
1019 | { | |
1020 | WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev)); | |
1021 | } | |
1022 | EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister); | |
1023 | ||
2958b1ec JD |
1024 | static void __init hwmon_pci_quirks(void) |
1025 | { | |
1026 | #if defined CONFIG_X86 && defined CONFIG_PCI | |
1027 | struct pci_dev *sb; | |
1028 | u16 base; | |
1029 | u8 enable; | |
1030 | ||
1031 | /* Open access to 0x295-0x296 on MSI MS-7031 */ | |
1032 | sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL); | |
d6dab7dd JD |
1033 | if (sb) { |
1034 | if (sb->subsystem_vendor == 0x1462 && /* MSI */ | |
1035 | sb->subsystem_device == 0x0031) { /* MS-7031 */ | |
1036 | pci_read_config_byte(sb, 0x48, &enable); | |
1037 | pci_read_config_word(sb, 0x64, &base); | |
1038 | ||
1039 | if (base == 0 && !(enable & BIT(2))) { | |
1040 | dev_info(&sb->dev, | |
1041 | "Opening wide generic port at 0x295\n"); | |
1042 | pci_write_config_word(sb, 0x64, 0x295); | |
1043 | pci_write_config_byte(sb, 0x48, | |
1044 | enable | BIT(2)); | |
1045 | } | |
2958b1ec | 1046 | } |
d6dab7dd | 1047 | pci_dev_put(sb); |
2958b1ec JD |
1048 | } |
1049 | #endif | |
1050 | } | |
1051 | ||
1236441f MH |
1052 | static int __init hwmon_init(void) |
1053 | { | |
bab2243c GR |
1054 | int err; |
1055 | ||
2958b1ec JD |
1056 | hwmon_pci_quirks(); |
1057 | ||
bab2243c GR |
1058 | err = class_register(&hwmon_class); |
1059 | if (err) { | |
1060 | pr_err("couldn't register hwmon sysfs class\n"); | |
1061 | return err; | |
1236441f MH |
1062 | } |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static void __exit hwmon_exit(void) | |
1067 | { | |
bab2243c | 1068 | class_unregister(&hwmon_class); |
1236441f MH |
1069 | } |
1070 | ||
37f54ee5 | 1071 | subsys_initcall(hwmon_init); |
1236441f MH |
1072 | module_exit(hwmon_exit); |
1073 | ||
1236441f MH |
1074 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); |
1075 | MODULE_DESCRIPTION("hardware monitoring sysfs/class support"); | |
1076 | MODULE_LICENSE("GPL"); | |
1077 |