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 | ||
86430c1a GR |
111 | /* |
112 | * The complex conditional is necessary to avoid a cyclic dependency | |
113 | * between hwmon and thermal_sys modules. | |
114 | */ | |
115 | #if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) && \ | |
116 | (!defined(CONFIG_THERMAL_HWMON) || \ | |
117 | !(defined(MODULE) && IS_MODULE(CONFIG_THERMAL))) | |
d560168b GR |
118 | static int hwmon_thermal_get_temp(void *data, int *temp) |
119 | { | |
120 | struct hwmon_thermal_data *tdata = data; | |
121 | struct hwmon_device *hwdev = tdata->hwdev; | |
122 | int ret; | |
123 | long t; | |
124 | ||
125 | ret = hwdev->chip->ops->read(&hwdev->dev, hwmon_temp, hwmon_temp_input, | |
126 | tdata->index, &t); | |
127 | if (ret < 0) | |
128 | return ret; | |
129 | ||
130 | *temp = t; | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static struct thermal_zone_of_device_ops hwmon_thermal_ops = { | |
136 | .get_temp = hwmon_thermal_get_temp, | |
137 | }; | |
138 | ||
139 | static int hwmon_thermal_add_sensor(struct device *dev, | |
140 | struct hwmon_device *hwdev, int index) | |
141 | { | |
142 | struct hwmon_thermal_data *tdata; | |
143 | ||
144 | tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL); | |
145 | if (!tdata) | |
146 | return -ENOMEM; | |
147 | ||
148 | tdata->hwdev = hwdev; | |
149 | tdata->index = index; | |
150 | ||
151 | devm_thermal_zone_of_sensor_register(&hwdev->dev, index, tdata, | |
152 | &hwmon_thermal_ops); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | #else | |
157 | static int hwmon_thermal_add_sensor(struct device *dev, | |
158 | struct hwmon_device *hwdev, int index) | |
159 | { | |
160 | return 0; | |
161 | } | |
86430c1a | 162 | #endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */ |
d560168b GR |
163 | |
164 | /* sysfs attribute management */ | |
165 | ||
166 | static ssize_t hwmon_attr_show(struct device *dev, | |
167 | struct device_attribute *devattr, char *buf) | |
168 | { | |
169 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
170 | long val; | |
171 | int ret; | |
172 | ||
173 | ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index, | |
174 | &val); | |
175 | if (ret < 0) | |
176 | return ret; | |
177 | ||
178 | return sprintf(buf, "%ld\n", val); | |
179 | } | |
180 | ||
181 | static ssize_t hwmon_attr_store(struct device *dev, | |
182 | struct device_attribute *devattr, | |
183 | const char *buf, size_t count) | |
184 | { | |
185 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); | |
186 | long val; | |
187 | int ret; | |
188 | ||
189 | ret = kstrtol(buf, 10, &val); | |
190 | if (ret < 0) | |
191 | return ret; | |
192 | ||
193 | ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index, | |
194 | val); | |
195 | if (ret < 0) | |
196 | return ret; | |
197 | ||
198 | return count; | |
199 | } | |
200 | ||
201 | static int hwmon_attr_base(enum hwmon_sensor_types type) | |
202 | { | |
203 | if (type == hwmon_in) | |
204 | return 0; | |
205 | return 1; | |
206 | } | |
207 | ||
208 | static struct attribute *hwmon_genattr(struct device *dev, | |
209 | const void *drvdata, | |
210 | enum hwmon_sensor_types type, | |
211 | u32 attr, | |
212 | int index, | |
213 | const char *template, | |
214 | const struct hwmon_ops *ops) | |
215 | { | |
216 | struct hwmon_device_attribute *hattr; | |
217 | struct device_attribute *dattr; | |
218 | struct attribute *a; | |
219 | umode_t mode; | |
220 | char *name; | |
221 | ||
222 | /* The attribute is invisible if there is no template string */ | |
223 | if (!template) | |
224 | return ERR_PTR(-ENOENT); | |
225 | ||
226 | mode = ops->is_visible(drvdata, type, attr, index); | |
227 | if (!mode) | |
228 | return ERR_PTR(-ENOENT); | |
229 | ||
230 | if ((mode & S_IRUGO) && !ops->read) | |
231 | return ERR_PTR(-EINVAL); | |
232 | if ((mode & S_IWUGO) && !ops->write) | |
233 | return ERR_PTR(-EINVAL); | |
234 | ||
235 | if (type == hwmon_chip) { | |
236 | name = (char *)template; | |
237 | } else { | |
238 | name = devm_kzalloc(dev, strlen(template) + 16, GFP_KERNEL); | |
239 | if (!name) | |
240 | return ERR_PTR(-ENOMEM); | |
241 | scnprintf(name, strlen(template) + 16, template, | |
242 | index + hwmon_attr_base(type)); | |
243 | } | |
244 | ||
245 | hattr = devm_kzalloc(dev, sizeof(*hattr), GFP_KERNEL); | |
246 | if (!hattr) | |
247 | return ERR_PTR(-ENOMEM); | |
248 | ||
249 | hattr->type = type; | |
250 | hattr->attr = attr; | |
251 | hattr->index = index; | |
252 | hattr->ops = ops; | |
253 | ||
254 | dattr = &hattr->dev_attr; | |
255 | dattr->show = hwmon_attr_show; | |
256 | dattr->store = hwmon_attr_store; | |
257 | ||
258 | a = &dattr->attr; | |
259 | sysfs_attr_init(a); | |
260 | a->name = name; | |
261 | a->mode = mode; | |
262 | ||
263 | return a; | |
264 | } | |
265 | ||
266 | static const char * const hwmon_chip_attr_templates[] = { | |
267 | [hwmon_chip_temp_reset_history] = "temp_reset_history", | |
00d616cf | 268 | [hwmon_chip_in_reset_history] = "in_reset_history", |
9b26947c | 269 | [hwmon_chip_curr_reset_history] = "curr_reset_history", |
b308f5c7 | 270 | [hwmon_chip_power_reset_history] = "power_reset_history", |
d560168b GR |
271 | [hwmon_chip_update_interval] = "update_interval", |
272 | [hwmon_chip_alarms] = "alarms", | |
273 | }; | |
274 | ||
275 | static const char * const hwmon_temp_attr_templates[] = { | |
276 | [hwmon_temp_input] = "temp%d_input", | |
277 | [hwmon_temp_type] = "temp%d_type", | |
278 | [hwmon_temp_lcrit] = "temp%d_lcrit", | |
279 | [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst", | |
280 | [hwmon_temp_min] = "temp%d_min", | |
281 | [hwmon_temp_min_hyst] = "temp%d_min_hyst", | |
282 | [hwmon_temp_max] = "temp%d_max", | |
283 | [hwmon_temp_max_hyst] = "temp%d_max_hyst", | |
284 | [hwmon_temp_crit] = "temp%d_crit", | |
285 | [hwmon_temp_crit_hyst] = "temp%d_crit_hyst", | |
286 | [hwmon_temp_emergency] = "temp%d_emergency", | |
287 | [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst", | |
288 | [hwmon_temp_alarm] = "temp%d_alarm", | |
289 | [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm", | |
290 | [hwmon_temp_min_alarm] = "temp%d_min_alarm", | |
291 | [hwmon_temp_max_alarm] = "temp%d_max_alarm", | |
292 | [hwmon_temp_crit_alarm] = "temp%d_crit_alarm", | |
293 | [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm", | |
294 | [hwmon_temp_fault] = "temp%d_fault", | |
295 | [hwmon_temp_offset] = "temp%d_offset", | |
296 | [hwmon_temp_label] = "temp%d_label", | |
297 | [hwmon_temp_lowest] = "temp%d_lowest", | |
298 | [hwmon_temp_highest] = "temp%d_highest", | |
299 | [hwmon_temp_reset_history] = "temp%d_reset_history", | |
300 | }; | |
301 | ||
00d616cf GR |
302 | static const char * const hwmon_in_attr_templates[] = { |
303 | [hwmon_in_input] = "in%d_input", | |
304 | [hwmon_in_min] = "in%d_min", | |
305 | [hwmon_in_max] = "in%d_max", | |
306 | [hwmon_in_lcrit] = "in%d_lcrit", | |
307 | [hwmon_in_crit] = "in%d_crit", | |
308 | [hwmon_in_average] = "in%d_average", | |
309 | [hwmon_in_lowest] = "in%d_lowest", | |
310 | [hwmon_in_highest] = "in%d_highest", | |
311 | [hwmon_in_reset_history] = "in%d_reset_history", | |
312 | [hwmon_in_label] = "in%d_label", | |
313 | [hwmon_in_alarm] = "in%d_alarm", | |
314 | [hwmon_in_min_alarm] = "in%d_min_alarm", | |
315 | [hwmon_in_max_alarm] = "in%d_max_alarm", | |
316 | [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm", | |
317 | [hwmon_in_crit_alarm] = "in%d_crit_alarm", | |
318 | }; | |
319 | ||
9b26947c GR |
320 | static const char * const hwmon_curr_attr_templates[] = { |
321 | [hwmon_curr_input] = "curr%d_input", | |
322 | [hwmon_curr_min] = "curr%d_min", | |
323 | [hwmon_curr_max] = "curr%d_max", | |
324 | [hwmon_curr_lcrit] = "curr%d_lcrit", | |
325 | [hwmon_curr_crit] = "curr%d_crit", | |
326 | [hwmon_curr_average] = "curr%d_average", | |
327 | [hwmon_curr_lowest] = "curr%d_lowest", | |
328 | [hwmon_curr_highest] = "curr%d_highest", | |
329 | [hwmon_curr_reset_history] = "curr%d_reset_history", | |
330 | [hwmon_curr_label] = "curr%d_label", | |
331 | [hwmon_curr_alarm] = "curr%d_alarm", | |
332 | [hwmon_curr_min_alarm] = "curr%d_min_alarm", | |
333 | [hwmon_curr_max_alarm] = "curr%d_max_alarm", | |
334 | [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm", | |
335 | [hwmon_curr_crit_alarm] = "curr%d_crit_alarm", | |
336 | }; | |
337 | ||
b308f5c7 GR |
338 | static const char * const hwmon_power_attr_templates[] = { |
339 | [hwmon_power_average] = "power%d_average", | |
340 | [hwmon_power_average_interval] = "power%d_average_interval", | |
341 | [hwmon_power_average_interval_max] = "power%d_interval_max", | |
342 | [hwmon_power_average_interval_min] = "power%d_interval_min", | |
343 | [hwmon_power_average_highest] = "power%d_average_highest", | |
344 | [hwmon_power_average_lowest] = "power%d_average_lowest", | |
345 | [hwmon_power_average_max] = "power%d_average_max", | |
346 | [hwmon_power_average_min] = "power%d_average_min", | |
347 | [hwmon_power_input] = "power%d_input", | |
348 | [hwmon_power_input_highest] = "power%d_input_highest", | |
349 | [hwmon_power_input_lowest] = "power%d_input_lowest", | |
350 | [hwmon_power_reset_history] = "power%d_reset_history", | |
351 | [hwmon_power_accuracy] = "power%d_accuracy", | |
352 | [hwmon_power_cap] = "power%d_cap", | |
353 | [hwmon_power_cap_hyst] = "power%d_cap_hyst", | |
354 | [hwmon_power_cap_max] = "power%d_cap_max", | |
355 | [hwmon_power_cap_min] = "power%d_cap_min", | |
356 | [hwmon_power_max] = "power%d_max", | |
357 | [hwmon_power_crit] = "power%d_crit", | |
358 | [hwmon_power_label] = "power%d_label", | |
359 | [hwmon_power_alarm] = "power%d_alarm", | |
360 | [hwmon_power_cap_alarm] = "power%d_cap_alarm", | |
361 | [hwmon_power_max_alarm] = "power%d_max_alarm", | |
362 | [hwmon_power_crit_alarm] = "power%d_crit_alarm", | |
363 | }; | |
364 | ||
6bfcca44 GR |
365 | static const char * const hwmon_energy_attr_templates[] = { |
366 | [hwmon_energy_input] = "energy%d_input", | |
367 | [hwmon_energy_label] = "energy%d_label", | |
368 | }; | |
369 | ||
370 | static const char * const hwmon_humidity_attr_templates[] = { | |
371 | [hwmon_humidity_input] = "humidity%d_input", | |
372 | [hwmon_humidity_label] = "humidity%d_label", | |
373 | [hwmon_humidity_min] = "humidity%d_min", | |
374 | [hwmon_humidity_min_hyst] = "humidity%d_min_hyst", | |
375 | [hwmon_humidity_max] = "humidity%d_max", | |
376 | [hwmon_humidity_max_hyst] = "humidity%d_max_hyst", | |
377 | [hwmon_humidity_alarm] = "humidity%d_alarm", | |
378 | [hwmon_humidity_fault] = "humidity%d_fault", | |
379 | }; | |
380 | ||
8faee73f GR |
381 | static const char * const hwmon_fan_attr_templates[] = { |
382 | [hwmon_fan_input] = "fan%d_input", | |
383 | [hwmon_fan_label] = "fan%d_label", | |
384 | [hwmon_fan_min] = "fan%d_min", | |
385 | [hwmon_fan_max] = "fan%d_max", | |
386 | [hwmon_fan_div] = "fan%d_div", | |
387 | [hwmon_fan_pulses] = "fan%d_pulses", | |
388 | [hwmon_fan_target] = "fan%d_target", | |
389 | [hwmon_fan_alarm] = "fan%d_alarm", | |
390 | [hwmon_fan_min_alarm] = "fan%d_min_alarm", | |
391 | [hwmon_fan_max_alarm] = "fan%d_max_alarm", | |
392 | [hwmon_fan_fault] = "fan%d_fault", | |
393 | }; | |
394 | ||
f9f7bb3a GR |
395 | static const char * const hwmon_pwm_attr_templates[] = { |
396 | [hwmon_pwm_input] = "pwm%d", | |
397 | [hwmon_pwm_enable] = "pwm%d_enable", | |
398 | [hwmon_pwm_mode] = "pwm%d_mode", | |
399 | [hwmon_pwm_freq] = "pwm%d_freq", | |
400 | }; | |
401 | ||
d560168b GR |
402 | static const char * const *__templates[] = { |
403 | [hwmon_chip] = hwmon_chip_attr_templates, | |
404 | [hwmon_temp] = hwmon_temp_attr_templates, | |
00d616cf | 405 | [hwmon_in] = hwmon_in_attr_templates, |
9b26947c | 406 | [hwmon_curr] = hwmon_curr_attr_templates, |
b308f5c7 | 407 | [hwmon_power] = hwmon_power_attr_templates, |
6bfcca44 GR |
408 | [hwmon_energy] = hwmon_energy_attr_templates, |
409 | [hwmon_humidity] = hwmon_humidity_attr_templates, | |
8faee73f | 410 | [hwmon_fan] = hwmon_fan_attr_templates, |
f9f7bb3a | 411 | [hwmon_pwm] = hwmon_pwm_attr_templates, |
d560168b GR |
412 | }; |
413 | ||
414 | static const int __templates_size[] = { | |
415 | [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attr_templates), | |
416 | [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates), | |
00d616cf | 417 | [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates), |
9b26947c | 418 | [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates), |
b308f5c7 | 419 | [hwmon_power] = ARRAY_SIZE(hwmon_power_attr_templates), |
6bfcca44 GR |
420 | [hwmon_energy] = ARRAY_SIZE(hwmon_energy_attr_templates), |
421 | [hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates), | |
8faee73f | 422 | [hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates), |
f9f7bb3a | 423 | [hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates), |
d560168b GR |
424 | }; |
425 | ||
426 | static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info) | |
427 | { | |
428 | int i, n; | |
429 | ||
430 | for (i = n = 0; info->config[i]; i++) | |
431 | n += hweight32(info->config[i]); | |
432 | ||
433 | return n; | |
434 | } | |
435 | ||
436 | static int hwmon_genattrs(struct device *dev, | |
437 | const void *drvdata, | |
438 | struct attribute **attrs, | |
439 | const struct hwmon_ops *ops, | |
440 | const struct hwmon_channel_info *info) | |
441 | { | |
442 | const char * const *templates; | |
443 | int template_size; | |
444 | int i, aindex = 0; | |
445 | ||
446 | if (info->type >= ARRAY_SIZE(__templates)) | |
447 | return -EINVAL; | |
448 | ||
449 | templates = __templates[info->type]; | |
450 | template_size = __templates_size[info->type]; | |
451 | ||
452 | for (i = 0; info->config[i]; i++) { | |
453 | u32 attr_mask = info->config[i]; | |
454 | u32 attr; | |
455 | ||
456 | while (attr_mask) { | |
457 | struct attribute *a; | |
458 | ||
459 | attr = __ffs(attr_mask); | |
460 | attr_mask &= ~BIT(attr); | |
461 | if (attr >= template_size) | |
462 | return -EINVAL; | |
463 | a = hwmon_genattr(dev, drvdata, info->type, attr, i, | |
464 | templates[attr], ops); | |
465 | if (IS_ERR(a)) { | |
466 | if (PTR_ERR(a) != -ENOENT) | |
467 | return PTR_ERR(a); | |
468 | continue; | |
469 | } | |
470 | attrs[aindex++] = a; | |
471 | } | |
472 | } | |
473 | return aindex; | |
474 | } | |
475 | ||
476 | static struct attribute ** | |
477 | __hwmon_create_attrs(struct device *dev, const void *drvdata, | |
478 | const struct hwmon_chip_info *chip) | |
479 | { | |
480 | int ret, i, aindex = 0, nattrs = 0; | |
481 | struct attribute **attrs; | |
482 | ||
483 | for (i = 0; chip->info[i]; i++) | |
484 | nattrs += hwmon_num_channel_attrs(chip->info[i]); | |
485 | ||
486 | if (nattrs == 0) | |
487 | return ERR_PTR(-EINVAL); | |
488 | ||
489 | attrs = devm_kcalloc(dev, nattrs + 1, sizeof(*attrs), GFP_KERNEL); | |
490 | if (!attrs) | |
491 | return ERR_PTR(-ENOMEM); | |
492 | ||
493 | for (i = 0; chip->info[i]; i++) { | |
494 | ret = hwmon_genattrs(dev, drvdata, &attrs[aindex], chip->ops, | |
495 | chip->info[i]); | |
496 | if (ret < 0) | |
497 | return ERR_PTR(ret); | |
498 | aindex += ret; | |
499 | } | |
500 | ||
501 | return attrs; | |
502 | } | |
503 | ||
504 | static struct device * | |
505 | __hwmon_device_register(struct device *dev, const char *name, void *drvdata, | |
506 | const struct hwmon_chip_info *chip, | |
507 | const struct attribute_group **groups) | |
1236441f | 508 | { |
bab2243c | 509 | struct hwmon_device *hwdev; |
d560168b GR |
510 | struct device *hdev; |
511 | int i, j, err, id; | |
ded2b666 | 512 | |
648cd48c GR |
513 | /* Do not accept invalid characters in hwmon name attribute */ |
514 | if (name && (!strlen(name) || strpbrk(name, "-* \t\n"))) | |
515 | return ERR_PTR(-EINVAL); | |
516 | ||
4ca5f468 JC |
517 | id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL); |
518 | if (id < 0) | |
519 | return ERR_PTR(id); | |
1236441f | 520 | |
bab2243c GR |
521 | hwdev = kzalloc(sizeof(*hwdev), GFP_KERNEL); |
522 | if (hwdev == NULL) { | |
523 | err = -ENOMEM; | |
524 | goto ida_remove; | |
525 | } | |
1236441f | 526 | |
d560168b GR |
527 | hdev = &hwdev->dev; |
528 | ||
529 | if (chip && chip->ops->is_visible) { | |
530 | struct attribute **attrs; | |
531 | int ngroups = 2; | |
532 | ||
533 | if (groups) | |
534 | for (i = 0; groups[i]; i++) | |
535 | ngroups++; | |
536 | ||
537 | hwdev->groups = devm_kcalloc(dev, ngroups, sizeof(*groups), | |
538 | GFP_KERNEL); | |
539 | if (!hwdev->groups) | |
540 | return ERR_PTR(-ENOMEM); | |
541 | ||
542 | attrs = __hwmon_create_attrs(dev, drvdata, chip); | |
543 | if (IS_ERR(attrs)) { | |
544 | err = PTR_ERR(attrs); | |
545 | goto free_hwmon; | |
546 | } | |
547 | ||
548 | hwdev->group.attrs = attrs; | |
549 | ngroups = 0; | |
550 | hwdev->groups[ngroups++] = &hwdev->group; | |
551 | ||
552 | if (groups) { | |
553 | for (i = 0; groups[i]; i++) | |
554 | hwdev->groups[ngroups++] = groups[i]; | |
555 | } | |
556 | ||
557 | hdev->groups = hwdev->groups; | |
558 | } else { | |
559 | hdev->groups = groups; | |
560 | } | |
561 | ||
bab2243c | 562 | hwdev->name = name; |
d560168b GR |
563 | hdev->class = &hwmon_class; |
564 | hdev->parent = dev; | |
565 | hdev->of_node = dev ? dev->of_node : NULL; | |
566 | hwdev->chip = chip; | |
567 | dev_set_drvdata(hdev, drvdata); | |
568 | dev_set_name(hdev, HWMON_ID_FORMAT, id); | |
569 | err = device_register(hdev); | |
bab2243c | 570 | if (err) |
d560168b GR |
571 | goto free_hwmon; |
572 | ||
573 | if (chip && chip->ops->is_visible && chip->ops->read && | |
574 | chip->info[0]->type == hwmon_chip && | |
575 | (chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) { | |
576 | const struct hwmon_channel_info **info = chip->info; | |
577 | ||
578 | for (i = 1; info[i]; i++) { | |
579 | if (info[i]->type != hwmon_temp) | |
580 | continue; | |
581 | ||
582 | for (j = 0; info[i]->config[j]; j++) { | |
583 | if (!chip->ops->is_visible(drvdata, hwmon_temp, | |
584 | hwmon_temp_input, j)) | |
585 | continue; | |
586 | if (info[i]->config[j] & HWMON_T_INPUT) | |
587 | hwmon_thermal_add_sensor(dev, hwdev, j); | |
588 | } | |
589 | } | |
590 | } | |
bab2243c | 591 | |
d560168b | 592 | return hdev; |
bab2243c | 593 | |
d560168b | 594 | free_hwmon: |
bab2243c GR |
595 | kfree(hwdev); |
596 | ida_remove: | |
597 | ida_simple_remove(&hwmon_ida, id); | |
598 | return ERR_PTR(err); | |
599 | } | |
d560168b GR |
600 | |
601 | /** | |
602 | * hwmon_device_register_with_groups - register w/ hwmon | |
603 | * @dev: the parent device | |
604 | * @name: hwmon name attribute | |
605 | * @drvdata: driver data to attach to created device | |
606 | * @groups: List of attribute groups to create | |
607 | * | |
608 | * hwmon_device_unregister() must be called when the device is no | |
609 | * longer needed. | |
610 | * | |
611 | * Returns the pointer to the new device. | |
612 | */ | |
613 | struct device * | |
614 | hwmon_device_register_with_groups(struct device *dev, const char *name, | |
615 | void *drvdata, | |
616 | const struct attribute_group **groups) | |
617 | { | |
618 | return __hwmon_device_register(dev, name, drvdata, NULL, groups); | |
619 | } | |
bab2243c | 620 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups); |
1236441f | 621 | |
d560168b GR |
622 | /** |
623 | * hwmon_device_register_with_info - register w/ hwmon | |
624 | * @dev: the parent device | |
625 | * @name: hwmon name attribute | |
626 | * @drvdata: driver data to attach to created device | |
627 | * @info: Pointer to hwmon chip information | |
628 | * @groups - pointer to list of driver specific attribute groups | |
629 | * | |
630 | * hwmon_device_unregister() must be called when the device is no | |
631 | * longer needed. | |
632 | * | |
633 | * Returns the pointer to the new device. | |
634 | */ | |
635 | struct device * | |
636 | hwmon_device_register_with_info(struct device *dev, const char *name, | |
637 | void *drvdata, | |
638 | const struct hwmon_chip_info *chip, | |
639 | const struct attribute_group **groups) | |
640 | { | |
641 | if (chip && (!chip->ops || !chip->info)) | |
642 | return ERR_PTR(-EINVAL); | |
643 | ||
644 | return __hwmon_device_register(dev, name, drvdata, chip, groups); | |
645 | } | |
646 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_info); | |
647 | ||
bab2243c GR |
648 | /** |
649 | * hwmon_device_register - register w/ hwmon | |
650 | * @dev: the device to register | |
651 | * | |
652 | * hwmon_device_unregister() must be called when the device is no | |
653 | * longer needed. | |
654 | * | |
655 | * Returns the pointer to the new device. | |
656 | */ | |
657 | struct device *hwmon_device_register(struct device *dev) | |
658 | { | |
659 | return hwmon_device_register_with_groups(dev, NULL, NULL, NULL); | |
1236441f | 660 | } |
839a9eef | 661 | EXPORT_SYMBOL_GPL(hwmon_device_register); |
1236441f MH |
662 | |
663 | /** | |
664 | * hwmon_device_unregister - removes the previously registered class device | |
665 | * | |
1beeffe4 | 666 | * @dev: the class device to destroy |
1236441f | 667 | */ |
1beeffe4 | 668 | void hwmon_device_unregister(struct device *dev) |
1236441f MH |
669 | { |
670 | int id; | |
671 | ||
739cf3a2 | 672 | if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { |
1beeffe4 | 673 | device_unregister(dev); |
4ca5f468 | 674 | ida_simple_remove(&hwmon_ida, id); |
1236441f | 675 | } else |
1beeffe4 | 676 | dev_dbg(dev->parent, |
1236441f MH |
677 | "hwmon_device_unregister() failed: bad class ID!\n"); |
678 | } | |
839a9eef | 679 | EXPORT_SYMBOL_GPL(hwmon_device_unregister); |
1236441f | 680 | |
74188cba GR |
681 | static void devm_hwmon_release(struct device *dev, void *res) |
682 | { | |
683 | struct device *hwdev = *(struct device **)res; | |
684 | ||
685 | hwmon_device_unregister(hwdev); | |
686 | } | |
687 | ||
688 | /** | |
689 | * devm_hwmon_device_register_with_groups - register w/ hwmon | |
690 | * @dev: the parent device | |
691 | * @name: hwmon name attribute | |
692 | * @drvdata: driver data to attach to created device | |
693 | * @groups: List of attribute groups to create | |
694 | * | |
695 | * Returns the pointer to the new device. The new device is automatically | |
696 | * unregistered with the parent device. | |
697 | */ | |
698 | struct device * | |
699 | devm_hwmon_device_register_with_groups(struct device *dev, const char *name, | |
700 | void *drvdata, | |
701 | const struct attribute_group **groups) | |
702 | { | |
703 | struct device **ptr, *hwdev; | |
704 | ||
705 | if (!dev) | |
706 | return ERR_PTR(-EINVAL); | |
707 | ||
708 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); | |
709 | if (!ptr) | |
710 | return ERR_PTR(-ENOMEM); | |
711 | ||
712 | hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups); | |
713 | if (IS_ERR(hwdev)) | |
714 | goto error; | |
715 | ||
716 | *ptr = hwdev; | |
717 | devres_add(dev, ptr); | |
718 | return hwdev; | |
719 | ||
720 | error: | |
721 | devres_free(ptr); | |
722 | return hwdev; | |
723 | } | |
724 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups); | |
725 | ||
d560168b GR |
726 | /** |
727 | * devm_hwmon_device_register_with_info - register w/ hwmon | |
728 | * @dev: the parent device | |
729 | * @name: hwmon name attribute | |
730 | * @drvdata: driver data to attach to created device | |
731 | * @info: Pointer to hwmon chip information | |
732 | * @groups - pointer to list of driver specific attribute groups | |
733 | * | |
734 | * Returns the pointer to the new device. The new device is automatically | |
735 | * unregistered with the parent device. | |
736 | */ | |
737 | struct device * | |
738 | devm_hwmon_device_register_with_info(struct device *dev, const char *name, | |
739 | void *drvdata, | |
740 | const struct hwmon_chip_info *chip, | |
741 | const struct attribute_group **groups) | |
742 | { | |
743 | struct device **ptr, *hwdev; | |
744 | ||
745 | if (!dev) | |
746 | return ERR_PTR(-EINVAL); | |
747 | ||
748 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); | |
749 | if (!ptr) | |
750 | return ERR_PTR(-ENOMEM); | |
751 | ||
752 | hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip, | |
753 | groups); | |
754 | if (IS_ERR(hwdev)) | |
755 | goto error; | |
756 | ||
757 | *ptr = hwdev; | |
758 | devres_add(dev, ptr); | |
759 | ||
760 | return hwdev; | |
761 | ||
762 | error: | |
763 | devres_free(ptr); | |
764 | return hwdev; | |
765 | } | |
766 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info); | |
767 | ||
74188cba GR |
768 | static int devm_hwmon_match(struct device *dev, void *res, void *data) |
769 | { | |
770 | struct device **hwdev = res; | |
771 | ||
772 | return *hwdev == data; | |
773 | } | |
774 | ||
775 | /** | |
776 | * devm_hwmon_device_unregister - removes a previously registered hwmon device | |
777 | * | |
778 | * @dev: the parent device of the device to unregister | |
779 | */ | |
780 | void devm_hwmon_device_unregister(struct device *dev) | |
781 | { | |
782 | WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev)); | |
783 | } | |
784 | EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister); | |
785 | ||
2958b1ec JD |
786 | static void __init hwmon_pci_quirks(void) |
787 | { | |
788 | #if defined CONFIG_X86 && defined CONFIG_PCI | |
789 | struct pci_dev *sb; | |
790 | u16 base; | |
791 | u8 enable; | |
792 | ||
793 | /* Open access to 0x295-0x296 on MSI MS-7031 */ | |
794 | sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL); | |
d6dab7dd JD |
795 | if (sb) { |
796 | if (sb->subsystem_vendor == 0x1462 && /* MSI */ | |
797 | sb->subsystem_device == 0x0031) { /* MS-7031 */ | |
798 | pci_read_config_byte(sb, 0x48, &enable); | |
799 | pci_read_config_word(sb, 0x64, &base); | |
800 | ||
801 | if (base == 0 && !(enable & BIT(2))) { | |
802 | dev_info(&sb->dev, | |
803 | "Opening wide generic port at 0x295\n"); | |
804 | pci_write_config_word(sb, 0x64, 0x295); | |
805 | pci_write_config_byte(sb, 0x48, | |
806 | enable | BIT(2)); | |
807 | } | |
2958b1ec | 808 | } |
d6dab7dd | 809 | pci_dev_put(sb); |
2958b1ec JD |
810 | } |
811 | #endif | |
812 | } | |
813 | ||
1236441f MH |
814 | static int __init hwmon_init(void) |
815 | { | |
bab2243c GR |
816 | int err; |
817 | ||
2958b1ec JD |
818 | hwmon_pci_quirks(); |
819 | ||
bab2243c GR |
820 | err = class_register(&hwmon_class); |
821 | if (err) { | |
822 | pr_err("couldn't register hwmon sysfs class\n"); | |
823 | return err; | |
1236441f MH |
824 | } |
825 | return 0; | |
826 | } | |
827 | ||
828 | static void __exit hwmon_exit(void) | |
829 | { | |
bab2243c | 830 | class_unregister(&hwmon_class); |
1236441f MH |
831 | } |
832 | ||
37f54ee5 | 833 | subsys_initcall(hwmon_init); |
1236441f MH |
834 | module_exit(hwmon_exit); |
835 | ||
1236441f MH |
836 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); |
837 | MODULE_DESCRIPTION("hardware monitoring sysfs/class support"); | |
838 | MODULE_LICENSE("GPL"); | |
839 |