1 | // SPDX-License-Identifier: GPL-2.0-only |
---|---|
2 | /* |
3 | * hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring |
4 | * |
5 | * This file defines the sysfs class "hwmon", for use by sensors drivers. |
6 | * |
7 | * Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com> |
8 | */ |
9 | |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | |
12 | #include <linux/bitops.h> |
13 | #include <linux/device.h> |
14 | #include <linux/err.h> |
15 | #include <linux/gfp.h> |
16 | #include <linux/hwmon.h> |
17 | #include <linux/i2c.h> |
18 | #include <linux/idr.h> |
19 | #include <linux/kstrtox.h> |
20 | #include <linux/list.h> |
21 | #include <linux/module.h> |
22 | #include <linux/pci.h> |
23 | #include <linux/property.h> |
24 | #include <linux/slab.h> |
25 | #include <linux/string.h> |
26 | #include <linux/thermal.h> |
27 | |
28 | #define CREATE_TRACE_POINTS |
29 | #include <trace/events/hwmon.h> |
30 | |
31 | #define HWMON_ID_PREFIX "hwmon" |
32 | #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" |
33 | |
34 | struct hwmon_device { |
35 | const char *name; |
36 | const char *label; |
37 | struct device dev; |
38 | const struct hwmon_chip_info *chip; |
39 | struct list_head tzdata; |
40 | struct attribute_group group; |
41 | const struct attribute_group **groups; |
42 | }; |
43 | |
44 | #define to_hwmon_device(d) container_of(d, struct hwmon_device, dev) |
45 | |
46 | #define MAX_SYSFS_ATTR_NAME_LENGTH 32 |
47 | |
48 | struct hwmon_device_attribute { |
49 | struct device_attribute dev_attr; |
50 | const struct hwmon_ops *ops; |
51 | enum hwmon_sensor_types type; |
52 | u32 attr; |
53 | int index; |
54 | char name[MAX_SYSFS_ATTR_NAME_LENGTH]; |
55 | }; |
56 | |
57 | #define to_hwmon_attr(d) \ |
58 | container_of(d, struct hwmon_device_attribute, dev_attr) |
59 | #define to_dev_attr(a) container_of(a, struct device_attribute, attr) |
60 | |
61 | /* |
62 | * Thermal zone information |
63 | */ |
64 | struct hwmon_thermal_data { |
65 | struct list_head node; /* hwmon tzdata list entry */ |
66 | struct device *dev; /* Reference to hwmon device */ |
67 | int index; /* sensor index */ |
68 | struct thermal_zone_device *tzd;/* thermal zone device */ |
69 | }; |
70 | |
71 | static ssize_t |
72 | name_show(struct device *dev, struct device_attribute *attr, char *buf) |
73 | { |
74 | return sprintf(buf, fmt: "%s\n", to_hwmon_device(dev)->name); |
75 | } |
76 | static DEVICE_ATTR_RO(name); |
77 | |
78 | static ssize_t |
79 | label_show(struct device *dev, struct device_attribute *attr, char *buf) |
80 | { |
81 | return sysfs_emit(buf, fmt: "%s\n", to_hwmon_device(dev)->label); |
82 | } |
83 | static DEVICE_ATTR_RO(label); |
84 | |
85 | static struct attribute *hwmon_dev_attrs[] = { |
86 | &dev_attr_name.attr, |
87 | &dev_attr_label.attr, |
88 | NULL |
89 | }; |
90 | |
91 | static umode_t hwmon_dev_attr_is_visible(struct kobject *kobj, |
92 | struct attribute *attr, int n) |
93 | { |
94 | struct device *dev = kobj_to_dev(kobj); |
95 | struct hwmon_device *hdev = to_hwmon_device(dev); |
96 | |
97 | if (attr == &dev_attr_name.attr && hdev->name == NULL) |
98 | return 0; |
99 | |
100 | if (attr == &dev_attr_label.attr && hdev->label == NULL) |
101 | return 0; |
102 | |
103 | return attr->mode; |
104 | } |
105 | |
106 | static const struct attribute_group hwmon_dev_attr_group = { |
107 | .attrs = hwmon_dev_attrs, |
108 | .is_visible = hwmon_dev_attr_is_visible, |
109 | }; |
110 | |
111 | static const struct attribute_group *hwmon_dev_attr_groups[] = { |
112 | &hwmon_dev_attr_group, |
113 | NULL |
114 | }; |
115 | |
116 | static void hwmon_free_attrs(struct attribute **attrs) |
117 | { |
118 | int i; |
119 | |
120 | for (i = 0; attrs[i]; i++) { |
121 | struct device_attribute *dattr = to_dev_attr(attrs[i]); |
122 | struct hwmon_device_attribute *hattr = to_hwmon_attr(dattr); |
123 | |
124 | kfree(objp: hattr); |
125 | } |
126 | kfree(objp: attrs); |
127 | } |
128 | |
129 | static void hwmon_dev_release(struct device *dev) |
130 | { |
131 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
132 | |
133 | if (hwdev->group.attrs) |
134 | hwmon_free_attrs(attrs: hwdev->group.attrs); |
135 | kfree(objp: hwdev->groups); |
136 | kfree(objp: hwdev->label); |
137 | kfree(objp: hwdev); |
138 | } |
139 | |
140 | static const struct class hwmon_class = { |
141 | .name = "hwmon", |
142 | .dev_groups = hwmon_dev_attr_groups, |
143 | .dev_release = hwmon_dev_release, |
144 | }; |
145 | |
146 | static DEFINE_IDA(hwmon_ida); |
147 | |
148 | static umode_t hwmon_is_visible(const struct hwmon_ops *ops, |
149 | const void *drvdata, |
150 | enum hwmon_sensor_types type, |
151 | u32 attr, int channel) |
152 | { |
153 | if (ops->visible) |
154 | return ops->visible; |
155 | |
156 | return ops->is_visible(drvdata, type, attr, channel); |
157 | } |
158 | |
159 | /* Thermal zone handling */ |
160 | |
161 | static int hwmon_thermal_get_temp(struct thermal_zone_device *tz, int *temp) |
162 | { |
163 | struct hwmon_thermal_data *tdata = thermal_zone_device_priv(tzd: tz); |
164 | struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); |
165 | int ret; |
166 | long t; |
167 | |
168 | ret = hwdev->chip->ops->read(tdata->dev, hwmon_temp, hwmon_temp_input, |
169 | tdata->index, &t); |
170 | if (ret < 0) |
171 | return ret; |
172 | |
173 | *temp = t; |
174 | |
175 | return 0; |
176 | } |
177 | |
178 | static int hwmon_thermal_set_trips(struct thermal_zone_device *tz, int low, int high) |
179 | { |
180 | struct hwmon_thermal_data *tdata = thermal_zone_device_priv(tzd: tz); |
181 | struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); |
182 | const struct hwmon_chip_info *chip = hwdev->chip; |
183 | const struct hwmon_channel_info * const *info = chip->info; |
184 | unsigned int i; |
185 | int err; |
186 | |
187 | if (!chip->ops->write) |
188 | return 0; |
189 | |
190 | for (i = 0; info[i] && info[i]->type != hwmon_temp; i++) |
191 | continue; |
192 | |
193 | if (!info[i]) |
194 | return 0; |
195 | |
196 | if (info[i]->config[tdata->index] & HWMON_T_MIN) { |
197 | err = chip->ops->write(tdata->dev, hwmon_temp, |
198 | hwmon_temp_min, tdata->index, low); |
199 | if (err && err != -EOPNOTSUPP) |
200 | return err; |
201 | } |
202 | |
203 | if (info[i]->config[tdata->index] & HWMON_T_MAX) { |
204 | err = chip->ops->write(tdata->dev, hwmon_temp, |
205 | hwmon_temp_max, tdata->index, high); |
206 | if (err && err != -EOPNOTSUPP) |
207 | return err; |
208 | } |
209 | |
210 | return 0; |
211 | } |
212 | |
213 | static const struct thermal_zone_device_ops hwmon_thermal_ops = { |
214 | .get_temp = hwmon_thermal_get_temp, |
215 | .set_trips = hwmon_thermal_set_trips, |
216 | }; |
217 | |
218 | static void hwmon_thermal_remove_sensor(void *data) |
219 | { |
220 | list_del(entry: data); |
221 | } |
222 | |
223 | static int hwmon_thermal_add_sensor(struct device *dev, int index) |
224 | { |
225 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
226 | struct hwmon_thermal_data *tdata; |
227 | struct thermal_zone_device *tzd; |
228 | int err; |
229 | |
230 | tdata = devm_kzalloc(dev, size: sizeof(*tdata), GFP_KERNEL); |
231 | if (!tdata) |
232 | return -ENOMEM; |
233 | |
234 | tdata->dev = dev; |
235 | tdata->index = index; |
236 | |
237 | tzd = devm_thermal_of_zone_register(dev, id: index, data: tdata, |
238 | ops: &hwmon_thermal_ops); |
239 | if (IS_ERR(ptr: tzd)) { |
240 | if (PTR_ERR(ptr: tzd) != -ENODEV) |
241 | return PTR_ERR(ptr: tzd); |
242 | dev_info(dev, "temp%d_input not attached to any thermal zone\n", |
243 | index + 1); |
244 | devm_kfree(dev, p: tdata); |
245 | return 0; |
246 | } |
247 | |
248 | err = devm_add_action(dev, hwmon_thermal_remove_sensor, &tdata->node); |
249 | if (err) |
250 | return err; |
251 | |
252 | tdata->tzd = tzd; |
253 | list_add(new: &tdata->node, head: &hwdev->tzdata); |
254 | |
255 | return 0; |
256 | } |
257 | |
258 | static int hwmon_thermal_register_sensors(struct device *dev) |
259 | { |
260 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
261 | const struct hwmon_chip_info *chip = hwdev->chip; |
262 | const struct hwmon_channel_info * const *info = chip->info; |
263 | void *drvdata = dev_get_drvdata(dev); |
264 | int i; |
265 | |
266 | if (!IS_ENABLED(CONFIG_THERMAL_OF)) |
267 | return 0; |
268 | |
269 | for (i = 1; info[i]; i++) { |
270 | int j; |
271 | |
272 | if (info[i]->type != hwmon_temp) |
273 | continue; |
274 | |
275 | for (j = 0; info[i]->config[j]; j++) { |
276 | int err; |
277 | |
278 | if (!(info[i]->config[j] & HWMON_T_INPUT) || |
279 | !hwmon_is_visible(ops: chip->ops, drvdata, type: hwmon_temp, |
280 | attr: hwmon_temp_input, channel: j)) |
281 | continue; |
282 | |
283 | err = hwmon_thermal_add_sensor(dev, index: j); |
284 | if (err) |
285 | return err; |
286 | } |
287 | } |
288 | |
289 | return 0; |
290 | } |
291 | |
292 | static void hwmon_thermal_notify(struct device *dev, int index) |
293 | { |
294 | struct hwmon_device *hwdev = to_hwmon_device(dev); |
295 | struct hwmon_thermal_data *tzdata; |
296 | |
297 | if (!IS_ENABLED(CONFIG_THERMAL_OF)) |
298 | return; |
299 | |
300 | list_for_each_entry(tzdata, &hwdev->tzdata, node) { |
301 | if (tzdata->index == index) { |
302 | thermal_zone_device_update(tzdata->tzd, |
303 | THERMAL_EVENT_UNSPECIFIED); |
304 | } |
305 | } |
306 | } |
307 | |
308 | static int hwmon_attr_base(enum hwmon_sensor_types type) |
309 | { |
310 | if (type == hwmon_in || type == hwmon_intrusion) |
311 | return 0; |
312 | return 1; |
313 | } |
314 | |
315 | #if IS_REACHABLE(CONFIG_I2C) |
316 | |
317 | /* |
318 | * PEC support |
319 | * |
320 | * The 'pec' attribute is attached to I2C client devices. It is only provided |
321 | * if the i2c controller supports PEC. |
322 | * |
323 | * The mutex ensures that PEC configuration between i2c device and the hardware |
324 | * is consistent. Use a single mutex because attribute writes are supposed to be |
325 | * rare, and maintaining a separate mutex for each hardware monitoring device |
326 | * would add substantial complexity to the driver for little if any gain. |
327 | * |
328 | * The hardware monitoring device is identified as child of the i2c client |
329 | * device. This assumes that only a single hardware monitoring device is |
330 | * attached to an i2c client device. |
331 | */ |
332 | |
333 | static DEFINE_MUTEX(hwmon_pec_mutex); |
334 | |
335 | static int hwmon_match_device(struct device *dev, const void *data) |
336 | { |
337 | return dev->class == &hwmon_class; |
338 | } |
339 | |
340 | static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, |
341 | char *buf) |
342 | { |
343 | struct i2c_client *client = to_i2c_client(dev); |
344 | |
345 | return sysfs_emit(buf, fmt: "%d\n", !!(client->flags & I2C_CLIENT_PEC)); |
346 | } |
347 | |
348 | static ssize_t pec_store(struct device *dev, struct device_attribute *devattr, |
349 | const char *buf, size_t count) |
350 | { |
351 | struct i2c_client *client = to_i2c_client(dev); |
352 | struct hwmon_device *hwdev; |
353 | struct device *hdev; |
354 | bool val; |
355 | int err; |
356 | |
357 | err = kstrtobool(s: buf, res: &val); |
358 | if (err < 0) |
359 | return err; |
360 | |
361 | hdev = device_find_child(parent: dev, NULL, match: hwmon_match_device); |
362 | if (!hdev) |
363 | return -ENODEV; |
364 | |
365 | mutex_lock(&hwmon_pec_mutex); |
366 | |
367 | /* |
368 | * If there is no write function, we assume that chip specific |
369 | * handling is not required. |
370 | */ |
371 | hwdev = to_hwmon_device(hdev); |
372 | if (hwdev->chip->ops->write) { |
373 | err = hwdev->chip->ops->write(hdev, hwmon_chip, hwmon_chip_pec, 0, val); |
374 | if (err && err != -EOPNOTSUPP) |
375 | goto unlock; |
376 | } |
377 | |
378 | if (!val) |
379 | client->flags &= ~I2C_CLIENT_PEC; |
380 | else |
381 | client->flags |= I2C_CLIENT_PEC; |
382 | |
383 | err = count; |
384 | unlock: |
385 | mutex_unlock(lock: &hwmon_pec_mutex); |
386 | put_device(dev: hdev); |
387 | |
388 | return err; |
389 | } |
390 | |
391 | static DEVICE_ATTR_RW(pec); |
392 | |
393 | static void hwmon_remove_pec(void *dev) |
394 | { |
395 | device_remove_file(dev, attr: &dev_attr_pec); |
396 | } |
397 | |
398 | static int hwmon_pec_register(struct device *hdev) |
399 | { |
400 | struct i2c_client *client = i2c_verify_client(dev: hdev->parent); |
401 | int err; |
402 | |
403 | if (!client) |
404 | return -EINVAL; |
405 | |
406 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_PEC)) |
407 | return 0; |
408 | |
409 | err = device_create_file(device: &client->dev, entry: &dev_attr_pec); |
410 | if (err) |
411 | return err; |
412 | |
413 | return devm_add_action_or_reset(hdev, hwmon_remove_pec, &client->dev); |
414 | } |
415 | |
416 | #else /* CONFIG_I2C */ |
417 | static int hwmon_pec_register(struct device *hdev) |
418 | { |
419 | return -EINVAL; |
420 | } |
421 | #endif /* CONFIG_I2C */ |
422 | |
423 | /* sysfs attribute management */ |
424 | |
425 | static ssize_t hwmon_attr_show(struct device *dev, |
426 | struct device_attribute *devattr, char *buf) |
427 | { |
428 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
429 | long val; |
430 | int ret; |
431 | |
432 | ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index, |
433 | &val); |
434 | if (ret < 0) |
435 | return ret; |
436 | |
437 | trace_hwmon_attr_show(index: hattr->index + hwmon_attr_base(type: hattr->type), |
438 | attr_name: hattr->name, val); |
439 | |
440 | return sprintf(buf, fmt: "%ld\n", val); |
441 | } |
442 | |
443 | static ssize_t hwmon_attr_show_string(struct device *dev, |
444 | struct device_attribute *devattr, |
445 | char *buf) |
446 | { |
447 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
448 | enum hwmon_sensor_types type = hattr->type; |
449 | const char *s; |
450 | int ret; |
451 | |
452 | ret = hattr->ops->read_string(dev, hattr->type, hattr->attr, |
453 | hattr->index, &s); |
454 | if (ret < 0) |
455 | return ret; |
456 | |
457 | trace_hwmon_attr_show_string(index: hattr->index + hwmon_attr_base(type), |
458 | attr_name: hattr->name, s); |
459 | |
460 | return sprintf(buf, fmt: "%s\n", s); |
461 | } |
462 | |
463 | static ssize_t hwmon_attr_store(struct device *dev, |
464 | struct device_attribute *devattr, |
465 | const char *buf, size_t count) |
466 | { |
467 | struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
468 | long val; |
469 | int ret; |
470 | |
471 | ret = kstrtol(s: buf, base: 10, res: &val); |
472 | if (ret < 0) |
473 | return ret; |
474 | |
475 | ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index, |
476 | val); |
477 | if (ret < 0) |
478 | return ret; |
479 | |
480 | trace_hwmon_attr_store(index: hattr->index + hwmon_attr_base(type: hattr->type), |
481 | attr_name: hattr->name, val); |
482 | |
483 | return count; |
484 | } |
485 | |
486 | static bool is_string_attr(enum hwmon_sensor_types type, u32 attr) |
487 | { |
488 | return (type == hwmon_temp && attr == hwmon_temp_label) || |
489 | (type == hwmon_in && attr == hwmon_in_label) || |
490 | (type == hwmon_curr && attr == hwmon_curr_label) || |
491 | (type == hwmon_power && attr == hwmon_power_label) || |
492 | (type == hwmon_energy && attr == hwmon_energy_label) || |
493 | (type == hwmon_humidity && attr == hwmon_humidity_label) || |
494 | (type == hwmon_fan && attr == hwmon_fan_label); |
495 | } |
496 | |
497 | static struct attribute *hwmon_genattr(const void *drvdata, |
498 | enum hwmon_sensor_types type, |
499 | u32 attr, |
500 | int index, |
501 | const char *template, |
502 | const struct hwmon_ops *ops) |
503 | { |
504 | struct hwmon_device_attribute *hattr; |
505 | struct device_attribute *dattr; |
506 | struct attribute *a; |
507 | umode_t mode; |
508 | const char *name; |
509 | bool is_string = is_string_attr(type, attr); |
510 | |
511 | mode = hwmon_is_visible(ops, drvdata, type, attr, channel: index); |
512 | if (!mode) |
513 | return ERR_PTR(error: -ENOENT); |
514 | |
515 | if ((mode & 0444) && ((is_string && !ops->read_string) || |
516 | (!is_string && !ops->read))) |
517 | return ERR_PTR(error: -EINVAL); |
518 | if ((mode & 0222) && !ops->write) |
519 | return ERR_PTR(error: -EINVAL); |
520 | |
521 | hattr = kzalloc(sizeof(*hattr), GFP_KERNEL); |
522 | if (!hattr) |
523 | return ERR_PTR(error: -ENOMEM); |
524 | |
525 | if (type == hwmon_chip) { |
526 | name = template; |
527 | } else { |
528 | scnprintf(buf: hattr->name, size: sizeof(hattr->name), fmt: template, |
529 | index + hwmon_attr_base(type)); |
530 | name = hattr->name; |
531 | } |
532 | |
533 | hattr->type = type; |
534 | hattr->attr = attr; |
535 | hattr->index = index; |
536 | hattr->ops = ops; |
537 | |
538 | dattr = &hattr->dev_attr; |
539 | dattr->show = is_string ? hwmon_attr_show_string : hwmon_attr_show; |
540 | dattr->store = hwmon_attr_store; |
541 | |
542 | a = &dattr->attr; |
543 | sysfs_attr_init(a); |
544 | a->name = name; |
545 | a->mode = mode; |
546 | |
547 | return a; |
548 | } |
549 | |
550 | /* |
551 | * Chip attributes are not attribute templates but actual sysfs attributes. |
552 | * See hwmon_genattr() for special handling. |
553 | */ |
554 | static const char * const hwmon_chip_attrs[] = { |
555 | [hwmon_chip_temp_reset_history] = "temp_reset_history", |
556 | [hwmon_chip_in_reset_history] = "in_reset_history", |
557 | [hwmon_chip_curr_reset_history] = "curr_reset_history", |
558 | [hwmon_chip_power_reset_history] = "power_reset_history", |
559 | [hwmon_chip_update_interval] = "update_interval", |
560 | [hwmon_chip_alarms] = "alarms", |
561 | [hwmon_chip_samples] = "samples", |
562 | [hwmon_chip_curr_samples] = "curr_samples", |
563 | [hwmon_chip_in_samples] = "in_samples", |
564 | [hwmon_chip_power_samples] = "power_samples", |
565 | [hwmon_chip_temp_samples] = "temp_samples", |
566 | [hwmon_chip_beep_enable] = "beep_enable", |
567 | }; |
568 | |
569 | static const char * const hwmon_temp_attr_templates[] = { |
570 | [hwmon_temp_enable] = "temp%d_enable", |
571 | [hwmon_temp_input] = "temp%d_input", |
572 | [hwmon_temp_type] = "temp%d_type", |
573 | [hwmon_temp_lcrit] = "temp%d_lcrit", |
574 | [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst", |
575 | [hwmon_temp_min] = "temp%d_min", |
576 | [hwmon_temp_min_hyst] = "temp%d_min_hyst", |
577 | [hwmon_temp_max] = "temp%d_max", |
578 | [hwmon_temp_max_hyst] = "temp%d_max_hyst", |
579 | [hwmon_temp_crit] = "temp%d_crit", |
580 | [hwmon_temp_crit_hyst] = "temp%d_crit_hyst", |
581 | [hwmon_temp_emergency] = "temp%d_emergency", |
582 | [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst", |
583 | [hwmon_temp_alarm] = "temp%d_alarm", |
584 | [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm", |
585 | [hwmon_temp_min_alarm] = "temp%d_min_alarm", |
586 | [hwmon_temp_max_alarm] = "temp%d_max_alarm", |
587 | [hwmon_temp_crit_alarm] = "temp%d_crit_alarm", |
588 | [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm", |
589 | [hwmon_temp_fault] = "temp%d_fault", |
590 | [hwmon_temp_offset] = "temp%d_offset", |
591 | [hwmon_temp_label] = "temp%d_label", |
592 | [hwmon_temp_lowest] = "temp%d_lowest", |
593 | [hwmon_temp_highest] = "temp%d_highest", |
594 | [hwmon_temp_reset_history] = "temp%d_reset_history", |
595 | [hwmon_temp_rated_min] = "temp%d_rated_min", |
596 | [hwmon_temp_rated_max] = "temp%d_rated_max", |
597 | [hwmon_temp_beep] = "temp%d_beep", |
598 | }; |
599 | |
600 | static const char * const hwmon_in_attr_templates[] = { |
601 | [hwmon_in_enable] = "in%d_enable", |
602 | [hwmon_in_input] = "in%d_input", |
603 | [hwmon_in_min] = "in%d_min", |
604 | [hwmon_in_max] = "in%d_max", |
605 | [hwmon_in_lcrit] = "in%d_lcrit", |
606 | [hwmon_in_crit] = "in%d_crit", |
607 | [hwmon_in_average] = "in%d_average", |
608 | [hwmon_in_lowest] = "in%d_lowest", |
609 | [hwmon_in_highest] = "in%d_highest", |
610 | [hwmon_in_reset_history] = "in%d_reset_history", |
611 | [hwmon_in_label] = "in%d_label", |
612 | [hwmon_in_alarm] = "in%d_alarm", |
613 | [hwmon_in_min_alarm] = "in%d_min_alarm", |
614 | [hwmon_in_max_alarm] = "in%d_max_alarm", |
615 | [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm", |
616 | [hwmon_in_crit_alarm] = "in%d_crit_alarm", |
617 | [hwmon_in_rated_min] = "in%d_rated_min", |
618 | [hwmon_in_rated_max] = "in%d_rated_max", |
619 | [hwmon_in_beep] = "in%d_beep", |
620 | [hwmon_in_fault] = "in%d_fault", |
621 | }; |
622 | |
623 | static const char * const hwmon_curr_attr_templates[] = { |
624 | [hwmon_curr_enable] = "curr%d_enable", |
625 | [hwmon_curr_input] = "curr%d_input", |
626 | [hwmon_curr_min] = "curr%d_min", |
627 | [hwmon_curr_max] = "curr%d_max", |
628 | [hwmon_curr_lcrit] = "curr%d_lcrit", |
629 | [hwmon_curr_crit] = "curr%d_crit", |
630 | [hwmon_curr_average] = "curr%d_average", |
631 | [hwmon_curr_lowest] = "curr%d_lowest", |
632 | [hwmon_curr_highest] = "curr%d_highest", |
633 | [hwmon_curr_reset_history] = "curr%d_reset_history", |
634 | [hwmon_curr_label] = "curr%d_label", |
635 | [hwmon_curr_alarm] = "curr%d_alarm", |
636 | [hwmon_curr_min_alarm] = "curr%d_min_alarm", |
637 | [hwmon_curr_max_alarm] = "curr%d_max_alarm", |
638 | [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm", |
639 | [hwmon_curr_crit_alarm] = "curr%d_crit_alarm", |
640 | [hwmon_curr_rated_min] = "curr%d_rated_min", |
641 | [hwmon_curr_rated_max] = "curr%d_rated_max", |
642 | [hwmon_curr_beep] = "curr%d_beep", |
643 | }; |
644 | |
645 | static const char * const hwmon_power_attr_templates[] = { |
646 | [hwmon_power_enable] = "power%d_enable", |
647 | [hwmon_power_average] = "power%d_average", |
648 | [hwmon_power_average_interval] = "power%d_average_interval", |
649 | [hwmon_power_average_interval_max] = "power%d_average_interval_max", |
650 | [hwmon_power_average_interval_min] = "power%d_average_interval_min", |
651 | [hwmon_power_average_highest] = "power%d_average_highest", |
652 | [hwmon_power_average_lowest] = "power%d_average_lowest", |
653 | [hwmon_power_average_max] = "power%d_average_max", |
654 | [hwmon_power_average_min] = "power%d_average_min", |
655 | [hwmon_power_input] = "power%d_input", |
656 | [hwmon_power_input_highest] = "power%d_input_highest", |
657 | [hwmon_power_input_lowest] = "power%d_input_lowest", |
658 | [hwmon_power_reset_history] = "power%d_reset_history", |
659 | [hwmon_power_accuracy] = "power%d_accuracy", |
660 | [hwmon_power_cap] = "power%d_cap", |
661 | [hwmon_power_cap_hyst] = "power%d_cap_hyst", |
662 | [hwmon_power_cap_max] = "power%d_cap_max", |
663 | [hwmon_power_cap_min] = "power%d_cap_min", |
664 | [hwmon_power_min] = "power%d_min", |
665 | [hwmon_power_max] = "power%d_max", |
666 | [hwmon_power_lcrit] = "power%d_lcrit", |
667 | [hwmon_power_crit] = "power%d_crit", |
668 | [hwmon_power_label] = "power%d_label", |
669 | [hwmon_power_alarm] = "power%d_alarm", |
670 | [hwmon_power_cap_alarm] = "power%d_cap_alarm", |
671 | [hwmon_power_min_alarm] = "power%d_min_alarm", |
672 | [hwmon_power_max_alarm] = "power%d_max_alarm", |
673 | [hwmon_power_lcrit_alarm] = "power%d_lcrit_alarm", |
674 | [hwmon_power_crit_alarm] = "power%d_crit_alarm", |
675 | [hwmon_power_rated_min] = "power%d_rated_min", |
676 | [hwmon_power_rated_max] = "power%d_rated_max", |
677 | }; |
678 | |
679 | static const char * const hwmon_energy_attr_templates[] = { |
680 | [hwmon_energy_enable] = "energy%d_enable", |
681 | [hwmon_energy_input] = "energy%d_input", |
682 | [hwmon_energy_label] = "energy%d_label", |
683 | }; |
684 | |
685 | static const char * const hwmon_humidity_attr_templates[] = { |
686 | [hwmon_humidity_enable] = "humidity%d_enable", |
687 | [hwmon_humidity_input] = "humidity%d_input", |
688 | [hwmon_humidity_label] = "humidity%d_label", |
689 | [hwmon_humidity_min] = "humidity%d_min", |
690 | [hwmon_humidity_min_hyst] = "humidity%d_min_hyst", |
691 | [hwmon_humidity_max] = "humidity%d_max", |
692 | [hwmon_humidity_max_hyst] = "humidity%d_max_hyst", |
693 | [hwmon_humidity_alarm] = "humidity%d_alarm", |
694 | [hwmon_humidity_fault] = "humidity%d_fault", |
695 | [hwmon_humidity_rated_min] = "humidity%d_rated_min", |
696 | [hwmon_humidity_rated_max] = "humidity%d_rated_max", |
697 | [hwmon_humidity_min_alarm] = "humidity%d_min_alarm", |
698 | [hwmon_humidity_max_alarm] = "humidity%d_max_alarm", |
699 | }; |
700 | |
701 | static const char * const hwmon_fan_attr_templates[] = { |
702 | [hwmon_fan_enable] = "fan%d_enable", |
703 | [hwmon_fan_input] = "fan%d_input", |
704 | [hwmon_fan_label] = "fan%d_label", |
705 | [hwmon_fan_min] = "fan%d_min", |
706 | [hwmon_fan_max] = "fan%d_max", |
707 | [hwmon_fan_div] = "fan%d_div", |
708 | [hwmon_fan_pulses] = "fan%d_pulses", |
709 | [hwmon_fan_target] = "fan%d_target", |
710 | [hwmon_fan_alarm] = "fan%d_alarm", |
711 | [hwmon_fan_min_alarm] = "fan%d_min_alarm", |
712 | [hwmon_fan_max_alarm] = "fan%d_max_alarm", |
713 | [hwmon_fan_fault] = "fan%d_fault", |
714 | [hwmon_fan_beep] = "fan%d_beep", |
715 | }; |
716 | |
717 | static const char * const hwmon_pwm_attr_templates[] = { |
718 | [hwmon_pwm_input] = "pwm%d", |
719 | [hwmon_pwm_enable] = "pwm%d_enable", |
720 | [hwmon_pwm_mode] = "pwm%d_mode", |
721 | [hwmon_pwm_freq] = "pwm%d_freq", |
722 | [hwmon_pwm_auto_channels_temp] = "pwm%d_auto_channels_temp", |
723 | }; |
724 | |
725 | static const char * const hwmon_intrusion_attr_templates[] = { |
726 | [hwmon_intrusion_alarm] = "intrusion%d_alarm", |
727 | [hwmon_intrusion_beep] = "intrusion%d_beep", |
728 | }; |
729 | |
730 | static const char * const *__templates[] = { |
731 | [hwmon_chip] = hwmon_chip_attrs, |
732 | [hwmon_temp] = hwmon_temp_attr_templates, |
733 | [hwmon_in] = hwmon_in_attr_templates, |
734 | [hwmon_curr] = hwmon_curr_attr_templates, |
735 | [hwmon_power] = hwmon_power_attr_templates, |
736 | [hwmon_energy] = hwmon_energy_attr_templates, |
737 | [hwmon_humidity] = hwmon_humidity_attr_templates, |
738 | [hwmon_fan] = hwmon_fan_attr_templates, |
739 | [hwmon_pwm] = hwmon_pwm_attr_templates, |
740 | [hwmon_intrusion] = hwmon_intrusion_attr_templates, |
741 | }; |
742 | |
743 | static const int __templates_size[] = { |
744 | [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attrs), |
745 | [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates), |
746 | [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates), |
747 | [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates), |
748 | [hwmon_power] = ARRAY_SIZE(hwmon_power_attr_templates), |
749 | [hwmon_energy] = ARRAY_SIZE(hwmon_energy_attr_templates), |
750 | [hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates), |
751 | [hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates), |
752 | [hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates), |
753 | [hwmon_intrusion] = ARRAY_SIZE(hwmon_intrusion_attr_templates), |
754 | }; |
755 | |
756 | int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, |
757 | u32 attr, int channel) |
758 | { |
759 | char event[MAX_SYSFS_ATTR_NAME_LENGTH + 5]; |
760 | char sattr[MAX_SYSFS_ATTR_NAME_LENGTH]; |
761 | char *envp[] = { event, NULL }; |
762 | const char * const *templates; |
763 | const char *template; |
764 | int base; |
765 | |
766 | if (type >= ARRAY_SIZE(__templates)) |
767 | return -EINVAL; |
768 | if (attr >= __templates_size[type]) |
769 | return -EINVAL; |
770 | |
771 | templates = __templates[type]; |
772 | template = templates[attr]; |
773 | |
774 | base = hwmon_attr_base(type); |
775 | |
776 | scnprintf(buf: sattr, MAX_SYSFS_ATTR_NAME_LENGTH, fmt: template, base + channel); |
777 | scnprintf(buf: event, size: sizeof(event), fmt: "NAME=%s", sattr); |
778 | sysfs_notify(kobj: &dev->kobj, NULL, attr: sattr); |
779 | kobject_uevent_env(kobj: &dev->kobj, action: KOBJ_CHANGE, envp); |
780 | |
781 | if (type == hwmon_temp) |
782 | hwmon_thermal_notify(dev, index: channel); |
783 | |
784 | return 0; |
785 | } |
786 | EXPORT_SYMBOL_GPL(hwmon_notify_event); |
787 | |
788 | static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info) |
789 | { |
790 | int i, n; |
791 | |
792 | for (i = n = 0; info->config[i]; i++) |
793 | n += hweight32(info->config[i]); |
794 | |
795 | return n; |
796 | } |
797 | |
798 | static int hwmon_genattrs(const void *drvdata, |
799 | struct attribute **attrs, |
800 | const struct hwmon_ops *ops, |
801 | const struct hwmon_channel_info *info) |
802 | { |
803 | const char * const *templates; |
804 | int template_size; |
805 | int i, aindex = 0; |
806 | |
807 | if (info->type >= ARRAY_SIZE(__templates)) |
808 | return -EINVAL; |
809 | |
810 | templates = __templates[info->type]; |
811 | template_size = __templates_size[info->type]; |
812 | |
813 | for (i = 0; info->config[i]; i++) { |
814 | u32 attr_mask = info->config[i]; |
815 | u32 attr; |
816 | |
817 | while (attr_mask) { |
818 | struct attribute *a; |
819 | |
820 | attr = __ffs(attr_mask); |
821 | attr_mask &= ~BIT(attr); |
822 | if (attr >= template_size || !templates[attr]) |
823 | continue; /* attribute is invisible */ |
824 | a = hwmon_genattr(drvdata, type: info->type, attr, index: i, |
825 | template: templates[attr], ops); |
826 | if (IS_ERR(ptr: a)) { |
827 | if (PTR_ERR(ptr: a) != -ENOENT) |
828 | return PTR_ERR(ptr: a); |
829 | continue; |
830 | } |
831 | attrs[aindex++] = a; |
832 | } |
833 | } |
834 | return aindex; |
835 | } |
836 | |
837 | static struct attribute ** |
838 | __hwmon_create_attrs(const void *drvdata, const struct hwmon_chip_info *chip) |
839 | { |
840 | int ret, i, aindex = 0, nattrs = 0; |
841 | struct attribute **attrs; |
842 | |
843 | for (i = 0; chip->info[i]; i++) |
844 | nattrs += hwmon_num_channel_attrs(info: chip->info[i]); |
845 | |
846 | if (nattrs == 0) |
847 | return ERR_PTR(error: -EINVAL); |
848 | |
849 | attrs = kcalloc(nattrs + 1, sizeof(*attrs), GFP_KERNEL); |
850 | if (!attrs) |
851 | return ERR_PTR(error: -ENOMEM); |
852 | |
853 | for (i = 0; chip->info[i]; i++) { |
854 | ret = hwmon_genattrs(drvdata, attrs: &attrs[aindex], ops: chip->ops, |
855 | info: chip->info[i]); |
856 | if (ret < 0) { |
857 | hwmon_free_attrs(attrs); |
858 | return ERR_PTR(error: ret); |
859 | } |
860 | aindex += ret; |
861 | } |
862 | |
863 | return attrs; |
864 | } |
865 | |
866 | static struct device * |
867 | __hwmon_device_register(struct device *dev, const char *name, void *drvdata, |
868 | const struct hwmon_chip_info *chip, |
869 | const struct attribute_group **groups) |
870 | { |
871 | struct hwmon_device *hwdev; |
872 | const char *label; |
873 | struct device *hdev; |
874 | struct device *tdev = dev; |
875 | int i, err, id; |
876 | |
877 | /* Complain about invalid characters in hwmon name attribute */ |
878 | if (name && (!strlen(name) || strpbrk(name, "-* \t\n"))) |
879 | dev_warn(dev, |
880 | "hwmon: '%s' is not a valid name attribute, please fix\n", |
881 | name); |
882 | |
883 | id = ida_alloc(ida: &hwmon_ida, GFP_KERNEL); |
884 | if (id < 0) |
885 | return ERR_PTR(error: id); |
886 | |
887 | hwdev = kzalloc(sizeof(*hwdev), GFP_KERNEL); |
888 | if (hwdev == NULL) { |
889 | err = -ENOMEM; |
890 | goto ida_remove; |
891 | } |
892 | |
893 | hdev = &hwdev->dev; |
894 | |
895 | if (chip) { |
896 | struct attribute **attrs; |
897 | int ngroups = 2; /* terminating NULL plus &hwdev->groups */ |
898 | |
899 | if (groups) |
900 | for (i = 0; groups[i]; i++) |
901 | ngroups++; |
902 | |
903 | hwdev->groups = kcalloc(ngroups, sizeof(*groups), GFP_KERNEL); |
904 | if (!hwdev->groups) { |
905 | err = -ENOMEM; |
906 | goto free_hwmon; |
907 | } |
908 | |
909 | attrs = __hwmon_create_attrs(drvdata, chip); |
910 | if (IS_ERR(ptr: attrs)) { |
911 | err = PTR_ERR(ptr: attrs); |
912 | goto free_hwmon; |
913 | } |
914 | |
915 | hwdev->group.attrs = attrs; |
916 | ngroups = 0; |
917 | hwdev->groups[ngroups++] = &hwdev->group; |
918 | |
919 | if (groups) { |
920 | for (i = 0; groups[i]; i++) |
921 | hwdev->groups[ngroups++] = groups[i]; |
922 | } |
923 | |
924 | hdev->groups = hwdev->groups; |
925 | } else { |
926 | hdev->groups = groups; |
927 | } |
928 | |
929 | if (dev && device_property_present(dev, propname: "label")) { |
930 | err = device_property_read_string(dev, propname: "label", val: &label); |
931 | if (err < 0) |
932 | goto free_hwmon; |
933 | |
934 | hwdev->label = kstrdup(s: label, GFP_KERNEL); |
935 | if (hwdev->label == NULL) { |
936 | err = -ENOMEM; |
937 | goto free_hwmon; |
938 | } |
939 | } |
940 | |
941 | hwdev->name = name; |
942 | hdev->class = &hwmon_class; |
943 | hdev->parent = dev; |
944 | while (tdev && !tdev->of_node) |
945 | tdev = tdev->parent; |
946 | hdev->of_node = tdev ? tdev->of_node : NULL; |
947 | hwdev->chip = chip; |
948 | dev_set_drvdata(dev: hdev, data: drvdata); |
949 | dev_set_name(dev: hdev, HWMON_ID_FORMAT, id); |
950 | err = device_register(dev: hdev); |
951 | if (err) { |
952 | put_device(dev: hdev); |
953 | goto ida_remove; |
954 | } |
955 | |
956 | INIT_LIST_HEAD(list: &hwdev->tzdata); |
957 | |
958 | if (hdev->of_node && chip && chip->ops->read && |
959 | chip->info[0]->type == hwmon_chip) { |
960 | u32 config = chip->info[0]->config[0]; |
961 | |
962 | if (config & HWMON_C_REGISTER_TZ) { |
963 | err = hwmon_thermal_register_sensors(dev: hdev); |
964 | if (err) { |
965 | device_unregister(dev: hdev); |
966 | /* |
967 | * Don't worry about hwdev; hwmon_dev_release(), |
968 | * called from device_unregister(), will free it. |
969 | */ |
970 | goto ida_remove; |
971 | } |
972 | } |
973 | if (config & HWMON_C_PEC) { |
974 | err = hwmon_pec_register(hdev); |
975 | if (err) { |
976 | device_unregister(dev: hdev); |
977 | goto ida_remove; |
978 | } |
979 | } |
980 | } |
981 | |
982 | return hdev; |
983 | |
984 | free_hwmon: |
985 | hwmon_dev_release(dev: hdev); |
986 | ida_remove: |
987 | ida_free(&hwmon_ida, id); |
988 | return ERR_PTR(error: err); |
989 | } |
990 | |
991 | /** |
992 | * hwmon_device_register_with_groups - register w/ hwmon |
993 | * @dev: the parent device |
994 | * @name: hwmon name attribute |
995 | * @drvdata: driver data to attach to created device |
996 | * @groups: List of attribute groups to create |
997 | * |
998 | * hwmon_device_unregister() must be called when the device is no |
999 | * longer needed. |
1000 | * |
1001 | * Returns the pointer to the new device. |
1002 | */ |
1003 | struct device * |
1004 | hwmon_device_register_with_groups(struct device *dev, const char *name, |
1005 | void *drvdata, |
1006 | const struct attribute_group **groups) |
1007 | { |
1008 | if (!name) |
1009 | return ERR_PTR(error: -EINVAL); |
1010 | |
1011 | return __hwmon_device_register(dev, name, drvdata, NULL, groups); |
1012 | } |
1013 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups); |
1014 | |
1015 | /** |
1016 | * hwmon_device_register_with_info - register w/ hwmon |
1017 | * @dev: the parent device (mandatory) |
1018 | * @name: hwmon name attribute (mandatory) |
1019 | * @drvdata: driver data to attach to created device (optional) |
1020 | * @chip: pointer to hwmon chip information (mandatory) |
1021 | * @extra_groups: pointer to list of additional non-standard attribute groups |
1022 | * (optional) |
1023 | * |
1024 | * hwmon_device_unregister() must be called when the device is no |
1025 | * longer needed. |
1026 | * |
1027 | * Returns the pointer to the new device. |
1028 | */ |
1029 | struct device * |
1030 | hwmon_device_register_with_info(struct device *dev, const char *name, |
1031 | void *drvdata, |
1032 | const struct hwmon_chip_info *chip, |
1033 | const struct attribute_group **extra_groups) |
1034 | { |
1035 | if (!dev || !name || !chip) |
1036 | return ERR_PTR(error: -EINVAL); |
1037 | |
1038 | if (!chip->ops || !(chip->ops->visible || chip->ops->is_visible) || !chip->info) |
1039 | return ERR_PTR(error: -EINVAL); |
1040 | |
1041 | return __hwmon_device_register(dev, name, drvdata, chip, groups: extra_groups); |
1042 | } |
1043 | EXPORT_SYMBOL_GPL(hwmon_device_register_with_info); |
1044 | |
1045 | /** |
1046 | * hwmon_device_register_for_thermal - register hwmon device for thermal subsystem |
1047 | * @dev: the parent device |
1048 | * @name: hwmon name attribute |
1049 | * @drvdata: driver data to attach to created device |
1050 | * |
1051 | * The use of this function is restricted. It is provided for legacy reasons |
1052 | * and must only be called from the thermal subsystem. |
1053 | * |
1054 | * hwmon_device_unregister() must be called when the device is no |
1055 | * longer needed. |
1056 | * |
1057 | * Returns the pointer to the new device. |
1058 | */ |
1059 | struct device * |
1060 | hwmon_device_register_for_thermal(struct device *dev, const char *name, |
1061 | void *drvdata) |
1062 | { |
1063 | if (!name || !dev) |
1064 | return ERR_PTR(error: -EINVAL); |
1065 | |
1066 | return __hwmon_device_register(dev, name, drvdata, NULL, NULL); |
1067 | } |
1068 | EXPORT_SYMBOL_NS_GPL(hwmon_device_register_for_thermal, "HWMON_THERMAL"); |
1069 | |
1070 | /** |
1071 | * hwmon_device_register - register w/ hwmon |
1072 | * @dev: the device to register |
1073 | * |
1074 | * hwmon_device_unregister() must be called when the device is no |
1075 | * longer needed. |
1076 | * |
1077 | * Returns the pointer to the new device. |
1078 | */ |
1079 | struct device *hwmon_device_register(struct device *dev) |
1080 | { |
1081 | dev_warn(dev, |
1082 | "hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().\n"); |
1083 | |
1084 | return __hwmon_device_register(dev, NULL, NULL, NULL, NULL); |
1085 | } |
1086 | EXPORT_SYMBOL_GPL(hwmon_device_register); |
1087 | |
1088 | /** |
1089 | * hwmon_device_unregister - removes the previously registered class device |
1090 | * |
1091 | * @dev: the class device to destroy |
1092 | */ |
1093 | void hwmon_device_unregister(struct device *dev) |
1094 | { |
1095 | int id; |
1096 | |
1097 | if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { |
1098 | device_unregister(dev); |
1099 | ida_free(&hwmon_ida, id); |
1100 | } else |
1101 | dev_dbg(dev->parent, |
1102 | "hwmon_device_unregister() failed: bad class ID!\n"); |
1103 | } |
1104 | EXPORT_SYMBOL_GPL(hwmon_device_unregister); |
1105 | |
1106 | static void devm_hwmon_release(struct device *dev, void *res) |
1107 | { |
1108 | struct device *hwdev = *(struct device **)res; |
1109 | |
1110 | hwmon_device_unregister(hwdev); |
1111 | } |
1112 | |
1113 | /** |
1114 | * devm_hwmon_device_register_with_groups - register w/ hwmon |
1115 | * @dev: the parent device |
1116 | * @name: hwmon name attribute |
1117 | * @drvdata: driver data to attach to created device |
1118 | * @groups: List of attribute groups to create |
1119 | * |
1120 | * Returns the pointer to the new device. The new device is automatically |
1121 | * unregistered with the parent device. |
1122 | */ |
1123 | struct device * |
1124 | devm_hwmon_device_register_with_groups(struct device *dev, const char *name, |
1125 | void *drvdata, |
1126 | const struct attribute_group **groups) |
1127 | { |
1128 | struct device **ptr, *hwdev; |
1129 | |
1130 | if (!dev) |
1131 | return ERR_PTR(error: -EINVAL); |
1132 | |
1133 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); |
1134 | if (!ptr) |
1135 | return ERR_PTR(error: -ENOMEM); |
1136 | |
1137 | hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups); |
1138 | if (IS_ERR(ptr: hwdev)) |
1139 | goto error; |
1140 | |
1141 | *ptr = hwdev; |
1142 | devres_add(dev, res: ptr); |
1143 | return hwdev; |
1144 | |
1145 | error: |
1146 | devres_free(res: ptr); |
1147 | return hwdev; |
1148 | } |
1149 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups); |
1150 | |
1151 | /** |
1152 | * devm_hwmon_device_register_with_info - register w/ hwmon |
1153 | * @dev: the parent device |
1154 | * @name: hwmon name attribute |
1155 | * @drvdata: driver data to attach to created device |
1156 | * @chip: pointer to hwmon chip information |
1157 | * @extra_groups: pointer to list of driver specific attribute groups |
1158 | * |
1159 | * Returns the pointer to the new device. The new device is automatically |
1160 | * unregistered with the parent device. |
1161 | */ |
1162 | struct device * |
1163 | devm_hwmon_device_register_with_info(struct device *dev, const char *name, |
1164 | void *drvdata, |
1165 | const struct hwmon_chip_info *chip, |
1166 | const struct attribute_group **extra_groups) |
1167 | { |
1168 | struct device **ptr, *hwdev; |
1169 | |
1170 | if (!dev) |
1171 | return ERR_PTR(error: -EINVAL); |
1172 | |
1173 | if (!name) { |
1174 | name = devm_hwmon_sanitize_name(dev, name: dev_name(dev)); |
1175 | if (IS_ERR(ptr: name)) |
1176 | return ERR_CAST(ptr: name); |
1177 | } |
1178 | |
1179 | ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL); |
1180 | if (!ptr) |
1181 | return ERR_PTR(error: -ENOMEM); |
1182 | |
1183 | hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip, |
1184 | extra_groups); |
1185 | if (IS_ERR(ptr: hwdev)) |
1186 | goto error; |
1187 | |
1188 | *ptr = hwdev; |
1189 | devres_add(dev, res: ptr); |
1190 | |
1191 | return hwdev; |
1192 | |
1193 | error: |
1194 | devres_free(res: ptr); |
1195 | return hwdev; |
1196 | } |
1197 | EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info); |
1198 | |
1199 | static char *__hwmon_sanitize_name(struct device *dev, const char *old_name) |
1200 | { |
1201 | char *name, *p; |
1202 | |
1203 | if (dev) |
1204 | name = devm_kstrdup(dev, s: old_name, GFP_KERNEL); |
1205 | else |
1206 | name = kstrdup(s: old_name, GFP_KERNEL); |
1207 | if (!name) |
1208 | return ERR_PTR(error: -ENOMEM); |
1209 | |
1210 | for (p = name; *p; p++) |
1211 | if (hwmon_is_bad_char(ch: *p)) |
1212 | *p = '_'; |
1213 | |
1214 | return name; |
1215 | } |
1216 | |
1217 | /** |
1218 | * hwmon_sanitize_name - Replaces invalid characters in a hwmon name |
1219 | * @name: NUL-terminated name |
1220 | * |
1221 | * Allocates a new string where any invalid characters will be replaced |
1222 | * by an underscore. It is the responsibility of the caller to release |
1223 | * the memory. |
1224 | * |
1225 | * Returns newly allocated name, or ERR_PTR on error. |
1226 | */ |
1227 | char *hwmon_sanitize_name(const char *name) |
1228 | { |
1229 | return __hwmon_sanitize_name(NULL, old_name: name); |
1230 | } |
1231 | EXPORT_SYMBOL_GPL(hwmon_sanitize_name); |
1232 | |
1233 | /** |
1234 | * devm_hwmon_sanitize_name - resource managed hwmon_sanitize_name() |
1235 | * @dev: device to allocate memory for |
1236 | * @name: NUL-terminated name |
1237 | * |
1238 | * Allocates a new string where any invalid characters will be replaced |
1239 | * by an underscore. |
1240 | * |
1241 | * Returns newly allocated name, or ERR_PTR on error. |
1242 | */ |
1243 | char *devm_hwmon_sanitize_name(struct device *dev, const char *name) |
1244 | { |
1245 | if (!dev) |
1246 | return ERR_PTR(error: -EINVAL); |
1247 | |
1248 | return __hwmon_sanitize_name(dev, old_name: name); |
1249 | } |
1250 | EXPORT_SYMBOL_GPL(devm_hwmon_sanitize_name); |
1251 | |
1252 | static void __init hwmon_pci_quirks(void) |
1253 | { |
1254 | #if defined CONFIG_X86 && defined CONFIG_PCI |
1255 | struct pci_dev *sb; |
1256 | u16 base; |
1257 | u8 enable; |
1258 | |
1259 | /* Open access to 0x295-0x296 on MSI MS-7031 */ |
1260 | sb = pci_get_device(PCI_VENDOR_ID_ATI, device: 0x436c, NULL); |
1261 | if (sb) { |
1262 | if (sb->subsystem_vendor == 0x1462 && /* MSI */ |
1263 | sb->subsystem_device == 0x0031) { /* MS-7031 */ |
1264 | pci_read_config_byte(dev: sb, where: 0x48, val: &enable); |
1265 | pci_read_config_word(dev: sb, where: 0x64, val: &base); |
1266 | |
1267 | if (base == 0 && !(enable & BIT(2))) { |
1268 | dev_info(&sb->dev, |
1269 | "Opening wide generic port at 0x295\n"); |
1270 | pci_write_config_word(dev: sb, where: 0x64, val: 0x295); |
1271 | pci_write_config_byte(dev: sb, where: 0x48, |
1272 | val: enable | BIT(2)); |
1273 | } |
1274 | } |
1275 | pci_dev_put(dev: sb); |
1276 | } |
1277 | #endif |
1278 | } |
1279 | |
1280 | static int __init hwmon_init(void) |
1281 | { |
1282 | int err; |
1283 | |
1284 | hwmon_pci_quirks(); |
1285 | |
1286 | err = class_register(class: &hwmon_class); |
1287 | if (err) { |
1288 | pr_err("couldn't register hwmon sysfs class\n"); |
1289 | return err; |
1290 | } |
1291 | return 0; |
1292 | } |
1293 | |
1294 | static void __exit hwmon_exit(void) |
1295 | { |
1296 | class_unregister(class: &hwmon_class); |
1297 | } |
1298 | |
1299 | subsys_initcall(hwmon_init); |
1300 | module_exit(hwmon_exit); |
1301 | |
1302 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); |
1303 | MODULE_DESCRIPTION("hardware monitoring sysfs/class support"); |
1304 | MODULE_LICENSE("GPL"); |
1305 | |
1306 |
Definitions
- hwmon_device
- hwmon_device_attribute
- hwmon_thermal_data
- name_show
- label_show
- hwmon_dev_attrs
- hwmon_dev_attr_is_visible
- hwmon_dev_attr_group
- hwmon_dev_attr_groups
- hwmon_free_attrs
- hwmon_dev_release
- hwmon_class
- hwmon_ida
- hwmon_is_visible
- hwmon_thermal_get_temp
- hwmon_thermal_set_trips
- hwmon_thermal_ops
- hwmon_thermal_remove_sensor
- hwmon_thermal_add_sensor
- hwmon_thermal_register_sensors
- hwmon_thermal_notify
- hwmon_attr_base
- hwmon_pec_mutex
- hwmon_match_device
- pec_show
- pec_store
- hwmon_remove_pec
- hwmon_pec_register
- hwmon_attr_show
- hwmon_attr_show_string
- hwmon_attr_store
- is_string_attr
- hwmon_genattr
- hwmon_chip_attrs
- hwmon_temp_attr_templates
- hwmon_in_attr_templates
- hwmon_curr_attr_templates
- hwmon_power_attr_templates
- hwmon_energy_attr_templates
- hwmon_humidity_attr_templates
- hwmon_fan_attr_templates
- hwmon_pwm_attr_templates
- hwmon_intrusion_attr_templates
- __templates
- __templates_size
- hwmon_notify_event
- hwmon_num_channel_attrs
- hwmon_genattrs
- __hwmon_create_attrs
- __hwmon_device_register
- hwmon_device_register_with_groups
- hwmon_device_register_with_info
- hwmon_device_register_for_thermal
- hwmon_device_register
- hwmon_device_unregister
- devm_hwmon_release
- devm_hwmon_device_register_with_groups
- devm_hwmon_device_register_with_info
- __hwmon_sanitize_name
- hwmon_sanitize_name
- devm_hwmon_sanitize_name
- hwmon_pci_quirks
- hwmon_init
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