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a369ee88 EV |
1 | /* |
2 | * thermal.c - sysfs interface of thermal devices | |
3 | * | |
4 | * Copyright (C) 2016 Eduardo Valentin <edubezval@gmail.com> | |
5 | * | |
6 | * Highly based on original thermal_core.c | |
7 | * Copyright (C) 2008 Intel Corp | |
8 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
9 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; version 2 of the License. | |
14 | */ | |
15 | ||
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
17 | ||
18 | #include <linux/sysfs.h> | |
19 | #include <linux/device.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/string.h> | |
23 | ||
24 | #include "thermal_core.h" | |
25 | ||
26 | /* sys I/F for thermal zone */ | |
27 | ||
28 | static ssize_t | |
29 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
30 | { | |
31 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
32 | ||
33 | return sprintf(buf, "%s\n", tz->type); | |
34 | } | |
35 | ||
36 | static ssize_t | |
37 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
38 | { | |
39 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
40 | int temperature, ret; | |
41 | ||
42 | ret = thermal_zone_get_temp(tz, &temperature); | |
43 | ||
44 | if (ret) | |
45 | return ret; | |
46 | ||
47 | return sprintf(buf, "%d\n", temperature); | |
48 | } | |
49 | ||
50 | static ssize_t | |
51 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
52 | { | |
53 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
54 | enum thermal_device_mode mode; | |
55 | int result; | |
56 | ||
57 | if (!tz->ops->get_mode) | |
58 | return -EPERM; | |
59 | ||
60 | result = tz->ops->get_mode(tz, &mode); | |
61 | if (result) | |
62 | return result; | |
63 | ||
64 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
65 | : "disabled"); | |
66 | } | |
67 | ||
68 | static ssize_t | |
69 | mode_store(struct device *dev, struct device_attribute *attr, | |
70 | const char *buf, size_t count) | |
71 | { | |
72 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
73 | int result; | |
74 | ||
75 | if (!tz->ops->set_mode) | |
76 | return -EPERM; | |
77 | ||
78 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) | |
79 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); | |
80 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) | |
81 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); | |
82 | else | |
83 | result = -EINVAL; | |
84 | ||
85 | if (result) | |
86 | return result; | |
87 | ||
88 | return count; | |
89 | } | |
90 | ||
91 | static ssize_t | |
92 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
93 | char *buf) | |
94 | { | |
95 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
96 | enum thermal_trip_type type; | |
97 | int trip, result; | |
98 | ||
99 | if (!tz->ops->get_trip_type) | |
100 | return -EPERM; | |
101 | ||
102 | if (sscanf(attr->attr.name, "trip_point_%d_type", &trip) != 1) | |
103 | return -EINVAL; | |
104 | ||
105 | result = tz->ops->get_trip_type(tz, trip, &type); | |
106 | if (result) | |
107 | return result; | |
108 | ||
109 | switch (type) { | |
110 | case THERMAL_TRIP_CRITICAL: | |
111 | return sprintf(buf, "critical\n"); | |
112 | case THERMAL_TRIP_HOT: | |
113 | return sprintf(buf, "hot\n"); | |
114 | case THERMAL_TRIP_PASSIVE: | |
115 | return sprintf(buf, "passive\n"); | |
116 | case THERMAL_TRIP_ACTIVE: | |
117 | return sprintf(buf, "active\n"); | |
118 | default: | |
119 | return sprintf(buf, "unknown\n"); | |
120 | } | |
121 | } | |
122 | ||
123 | static ssize_t | |
124 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
125 | const char *buf, size_t count) | |
126 | { | |
127 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
128 | int trip, ret; | |
129 | int temperature; | |
130 | ||
131 | if (!tz->ops->set_trip_temp) | |
132 | return -EPERM; | |
133 | ||
134 | if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) | |
135 | return -EINVAL; | |
136 | ||
137 | if (kstrtoint(buf, 10, &temperature)) | |
138 | return -EINVAL; | |
139 | ||
140 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
141 | if (ret) | |
142 | return ret; | |
143 | ||
144 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); | |
145 | ||
146 | return count; | |
147 | } | |
148 | ||
149 | static ssize_t | |
150 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
151 | char *buf) | |
152 | { | |
153 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
154 | int trip, ret; | |
155 | int temperature; | |
156 | ||
157 | if (!tz->ops->get_trip_temp) | |
158 | return -EPERM; | |
159 | ||
160 | if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) | |
161 | return -EINVAL; | |
162 | ||
163 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); | |
164 | ||
165 | if (ret) | |
166 | return ret; | |
167 | ||
168 | return sprintf(buf, "%d\n", temperature); | |
169 | } | |
170 | ||
171 | static ssize_t | |
172 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
173 | const char *buf, size_t count) | |
174 | { | |
175 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
176 | int trip, ret; | |
177 | int temperature; | |
178 | ||
179 | if (!tz->ops->set_trip_hyst) | |
180 | return -EPERM; | |
181 | ||
182 | if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) | |
183 | return -EINVAL; | |
184 | ||
185 | if (kstrtoint(buf, 10, &temperature)) | |
186 | return -EINVAL; | |
187 | ||
188 | /* | |
189 | * We are not doing any check on the 'temperature' value | |
190 | * here. The driver implementing 'set_trip_hyst' has to | |
191 | * take care of this. | |
192 | */ | |
193 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
194 | ||
195 | if (!ret) | |
196 | thermal_zone_set_trips(tz); | |
197 | ||
198 | return ret ? ret : count; | |
199 | } | |
200 | ||
201 | static ssize_t | |
202 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
203 | char *buf) | |
204 | { | |
205 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
206 | int trip, ret; | |
207 | int temperature; | |
208 | ||
209 | if (!tz->ops->get_trip_hyst) | |
210 | return -EPERM; | |
211 | ||
212 | if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) | |
213 | return -EINVAL; | |
214 | ||
215 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
216 | ||
217 | return ret ? ret : sprintf(buf, "%d\n", temperature); | |
218 | } | |
219 | ||
220 | static ssize_t | |
221 | passive_store(struct device *dev, struct device_attribute *attr, | |
222 | const char *buf, size_t count) | |
223 | { | |
224 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
225 | int state; | |
226 | ||
227 | if (sscanf(buf, "%d\n", &state) != 1) | |
228 | return -EINVAL; | |
229 | ||
230 | /* sanity check: values below 1000 millicelcius don't make sense | |
231 | * and can cause the system to go into a thermal heart attack | |
232 | */ | |
233 | if (state && state < 1000) | |
234 | return -EINVAL; | |
235 | ||
236 | if (state && !tz->forced_passive) { | |
237 | if (!tz->passive_delay) | |
238 | tz->passive_delay = 1000; | |
239 | thermal_zone_device_rebind_exception(tz, "Processor", | |
240 | sizeof("Processor")); | |
241 | } else if (!state && tz->forced_passive) { | |
242 | tz->passive_delay = 0; | |
243 | thermal_zone_device_unbind_exception(tz, "Processor", | |
244 | sizeof("Processor")); | |
245 | } | |
246 | ||
247 | tz->forced_passive = state; | |
248 | ||
249 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); | |
250 | ||
251 | return count; | |
252 | } | |
253 | ||
254 | static ssize_t | |
255 | passive_show(struct device *dev, struct device_attribute *attr, | |
256 | char *buf) | |
257 | { | |
258 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
259 | ||
260 | return sprintf(buf, "%d\n", tz->forced_passive); | |
261 | } | |
262 | ||
263 | static ssize_t | |
264 | policy_store(struct device *dev, struct device_attribute *attr, | |
265 | const char *buf, size_t count) | |
266 | { | |
267 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
268 | char name[THERMAL_NAME_LENGTH]; | |
269 | int ret; | |
270 | ||
271 | snprintf(name, sizeof(name), "%s", buf); | |
272 | ||
273 | ret = thermal_zone_device_set_policy(tz, name); | |
274 | if (!ret) | |
275 | ret = count; | |
276 | ||
277 | return ret; | |
278 | } | |
279 | ||
280 | static ssize_t | |
281 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
282 | { | |
283 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
284 | ||
285 | return sprintf(buf, "%s\n", tz->governor->name); | |
286 | } | |
287 | ||
288 | static ssize_t | |
289 | available_policies_show(struct device *dev, struct device_attribute *devattr, | |
290 | char *buf) | |
291 | { | |
292 | return thermal_build_list_of_policies(buf); | |
293 | } | |
294 | ||
698db4fd | 295 | #if (IS_ENABLED(CONFIG_THERMAL_EMULATION)) |
a369ee88 EV |
296 | static ssize_t |
297 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
298 | const char *buf, size_t count) | |
299 | { | |
300 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
301 | int ret = 0; | |
302 | int temperature; | |
303 | ||
304 | if (kstrtoint(buf, 10, &temperature)) | |
305 | return -EINVAL; | |
306 | ||
307 | if (!tz->ops->set_emul_temp) { | |
308 | mutex_lock(&tz->lock); | |
309 | tz->emul_temperature = temperature; | |
310 | mutex_unlock(&tz->lock); | |
311 | } else { | |
312 | ret = tz->ops->set_emul_temp(tz, temperature); | |
313 | } | |
314 | ||
315 | if (!ret) | |
316 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); | |
317 | ||
318 | return ret ? ret : count; | |
319 | } | |
698db4fd EV |
320 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); |
321 | #endif | |
a369ee88 EV |
322 | |
323 | static ssize_t | |
324 | sustainable_power_show(struct device *dev, struct device_attribute *devattr, | |
325 | char *buf) | |
326 | { | |
327 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
328 | ||
329 | if (tz->tzp) | |
330 | return sprintf(buf, "%u\n", tz->tzp->sustainable_power); | |
331 | else | |
332 | return -EIO; | |
333 | } | |
334 | ||
335 | static ssize_t | |
336 | sustainable_power_store(struct device *dev, struct device_attribute *devattr, | |
337 | const char *buf, size_t count) | |
338 | { | |
339 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
340 | u32 sustainable_power; | |
341 | ||
342 | if (!tz->tzp) | |
343 | return -EIO; | |
344 | ||
345 | if (kstrtou32(buf, 10, &sustainable_power)) | |
346 | return -EINVAL; | |
347 | ||
348 | tz->tzp->sustainable_power = sustainable_power; | |
349 | ||
350 | return count; | |
351 | } | |
352 | ||
353 | #define create_s32_tzp_attr(name) \ | |
354 | static ssize_t \ | |
355 | name##_show(struct device *dev, struct device_attribute *devattr, \ | |
356 | char *buf) \ | |
357 | { \ | |
358 | struct thermal_zone_device *tz = to_thermal_zone(dev); \ | |
359 | \ | |
360 | if (tz->tzp) \ | |
361 | return sprintf(buf, "%d\n", tz->tzp->name); \ | |
362 | else \ | |
363 | return -EIO; \ | |
364 | } \ | |
365 | \ | |
366 | static ssize_t \ | |
367 | name##_store(struct device *dev, struct device_attribute *devattr, \ | |
368 | const char *buf, size_t count) \ | |
369 | { \ | |
370 | struct thermal_zone_device *tz = to_thermal_zone(dev); \ | |
371 | s32 value; \ | |
372 | \ | |
373 | if (!tz->tzp) \ | |
374 | return -EIO; \ | |
375 | \ | |
376 | if (kstrtos32(buf, 10, &value)) \ | |
377 | return -EINVAL; \ | |
378 | \ | |
379 | tz->tzp->name = value; \ | |
380 | \ | |
381 | return count; \ | |
382 | } \ | |
383 | static DEVICE_ATTR(name, S_IWUSR | S_IRUGO, name##_show, name##_store) | |
384 | ||
385 | create_s32_tzp_attr(k_po); | |
386 | create_s32_tzp_attr(k_pu); | |
387 | create_s32_tzp_attr(k_i); | |
388 | create_s32_tzp_attr(k_d); | |
389 | create_s32_tzp_attr(integral_cutoff); | |
390 | create_s32_tzp_attr(slope); | |
391 | create_s32_tzp_attr(offset); | |
392 | #undef create_s32_tzp_attr | |
393 | ||
394 | /* | |
395 | * These are thermal zone device attributes that will always be present. | |
396 | * All the attributes created for tzp (create_s32_tzp_attr) also are always | |
397 | * present on the sysfs interface. | |
398 | */ | |
c828a892 JP |
399 | static DEVICE_ATTR_RO(type); |
400 | static DEVICE_ATTR_RO(temp); | |
b6b996b6 | 401 | static DEVICE_ATTR_RW(policy); |
c828a892 | 402 | static DEVICE_ATTR_RO(available_policies); |
b6b996b6 | 403 | static DEVICE_ATTR_RW(sustainable_power); |
a369ee88 EV |
404 | |
405 | /* These thermal zone device attributes are created based on conditions */ | |
b6b996b6 JP |
406 | static DEVICE_ATTR_RW(mode); |
407 | static DEVICE_ATTR_RW(passive); | |
a369ee88 EV |
408 | |
409 | /* These attributes are unconditionally added to a thermal zone */ | |
410 | static struct attribute *thermal_zone_dev_attrs[] = { | |
411 | &dev_attr_type.attr, | |
412 | &dev_attr_temp.attr, | |
413 | #if (IS_ENABLED(CONFIG_THERMAL_EMULATION)) | |
414 | &dev_attr_emul_temp.attr, | |
415 | #endif | |
416 | &dev_attr_policy.attr, | |
417 | &dev_attr_available_policies.attr, | |
418 | &dev_attr_sustainable_power.attr, | |
419 | &dev_attr_k_po.attr, | |
420 | &dev_attr_k_pu.attr, | |
421 | &dev_attr_k_i.attr, | |
422 | &dev_attr_k_d.attr, | |
423 | &dev_attr_integral_cutoff.attr, | |
424 | &dev_attr_slope.attr, | |
425 | &dev_attr_offset.attr, | |
426 | NULL, | |
427 | }; | |
428 | ||
429 | static struct attribute_group thermal_zone_attribute_group = { | |
430 | .attrs = thermal_zone_dev_attrs, | |
431 | }; | |
432 | ||
433 | /* We expose mode only if .get_mode is present */ | |
434 | static struct attribute *thermal_zone_mode_attrs[] = { | |
435 | &dev_attr_mode.attr, | |
436 | NULL, | |
437 | }; | |
438 | ||
439 | static umode_t thermal_zone_mode_is_visible(struct kobject *kobj, | |
440 | struct attribute *attr, | |
441 | int attrno) | |
442 | { | |
443 | struct device *dev = container_of(kobj, struct device, kobj); | |
444 | struct thermal_zone_device *tz; | |
445 | ||
446 | tz = container_of(dev, struct thermal_zone_device, device); | |
447 | ||
448 | if (tz->ops->get_mode) | |
449 | return attr->mode; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static struct attribute_group thermal_zone_mode_attribute_group = { | |
455 | .attrs = thermal_zone_mode_attrs, | |
456 | .is_visible = thermal_zone_mode_is_visible, | |
457 | }; | |
458 | ||
459 | /* We expose passive only if passive trips are present */ | |
460 | static struct attribute *thermal_zone_passive_attrs[] = { | |
461 | &dev_attr_passive.attr, | |
462 | NULL, | |
463 | }; | |
464 | ||
465 | static umode_t thermal_zone_passive_is_visible(struct kobject *kobj, | |
466 | struct attribute *attr, | |
467 | int attrno) | |
468 | { | |
469 | struct device *dev = container_of(kobj, struct device, kobj); | |
470 | struct thermal_zone_device *tz; | |
471 | enum thermal_trip_type trip_type; | |
472 | int count, passive = 0; | |
473 | ||
474 | tz = container_of(dev, struct thermal_zone_device, device); | |
475 | ||
476 | for (count = 0; count < tz->trips && !passive; count++) { | |
477 | tz->ops->get_trip_type(tz, count, &trip_type); | |
478 | ||
479 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
480 | passive = 1; | |
481 | } | |
482 | ||
483 | if (!passive) | |
484 | return attr->mode; | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | static struct attribute_group thermal_zone_passive_attribute_group = { | |
490 | .attrs = thermal_zone_passive_attrs, | |
491 | .is_visible = thermal_zone_passive_is_visible, | |
492 | }; | |
493 | ||
494 | static const struct attribute_group *thermal_zone_attribute_groups[] = { | |
495 | &thermal_zone_attribute_group, | |
496 | &thermal_zone_mode_attribute_group, | |
497 | &thermal_zone_passive_attribute_group, | |
498 | /* This is not NULL terminated as we create the group dynamically */ | |
499 | }; | |
500 | ||
501 | /** | |
502 | * create_trip_attrs() - create attributes for trip points | |
503 | * @tz: the thermal zone device | |
504 | * @mask: Writeable trip point bitmap. | |
505 | * | |
506 | * helper function to instantiate sysfs entries for every trip | |
507 | * point and its properties of a struct thermal_zone_device. | |
508 | * | |
509 | * Return: 0 on success, the proper error value otherwise. | |
510 | */ | |
511 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
512 | { | |
a369ee88 EV |
513 | struct attribute **attrs; |
514 | int indx; | |
515 | ||
516 | /* This function works only for zones with at least one trip */ | |
517 | if (tz->trips <= 0) | |
518 | return -EINVAL; | |
519 | ||
b819dc9e EV |
520 | tz->trip_type_attrs = kcalloc(tz->trips, sizeof(*tz->trip_type_attrs), |
521 | GFP_KERNEL); | |
a369ee88 EV |
522 | if (!tz->trip_type_attrs) |
523 | return -ENOMEM; | |
524 | ||
b819dc9e EV |
525 | tz->trip_temp_attrs = kcalloc(tz->trips, sizeof(*tz->trip_temp_attrs), |
526 | GFP_KERNEL); | |
a369ee88 EV |
527 | if (!tz->trip_temp_attrs) { |
528 | kfree(tz->trip_type_attrs); | |
529 | return -ENOMEM; | |
530 | } | |
531 | ||
532 | if (tz->ops->get_trip_hyst) { | |
b819dc9e EV |
533 | tz->trip_hyst_attrs = kcalloc(tz->trips, |
534 | sizeof(*tz->trip_hyst_attrs), | |
535 | GFP_KERNEL); | |
a369ee88 EV |
536 | if (!tz->trip_hyst_attrs) { |
537 | kfree(tz->trip_type_attrs); | |
538 | kfree(tz->trip_temp_attrs); | |
539 | return -ENOMEM; | |
540 | } | |
541 | } | |
542 | ||
b819dc9e | 543 | attrs = kcalloc(tz->trips * 3 + 1, sizeof(*attrs), GFP_KERNEL); |
a369ee88 EV |
544 | if (!attrs) { |
545 | kfree(tz->trip_type_attrs); | |
546 | kfree(tz->trip_temp_attrs); | |
547 | if (tz->ops->get_trip_hyst) | |
548 | kfree(tz->trip_hyst_attrs); | |
549 | return -ENOMEM; | |
550 | } | |
551 | ||
552 | for (indx = 0; indx < tz->trips; indx++) { | |
553 | /* create trip type attribute */ | |
554 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
555 | "trip_point_%d_type", indx); | |
556 | ||
557 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
558 | tz->trip_type_attrs[indx].attr.attr.name = | |
559 | tz->trip_type_attrs[indx].name; | |
560 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
561 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
562 | attrs[indx] = &tz->trip_type_attrs[indx].attr.attr; | |
563 | ||
564 | /* create trip temp attribute */ | |
565 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
566 | "trip_point_%d_temp", indx); | |
567 | ||
568 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
569 | tz->trip_temp_attrs[indx].attr.attr.name = | |
570 | tz->trip_temp_attrs[indx].name; | |
571 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
572 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
573 | if (IS_ENABLED(CONFIG_THERMAL_WRITABLE_TRIPS) && | |
574 | mask & (1 << indx)) { | |
575 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
576 | tz->trip_temp_attrs[indx].attr.store = | |
577 | trip_point_temp_store; | |
578 | } | |
579 | attrs[indx + tz->trips] = &tz->trip_temp_attrs[indx].attr.attr; | |
580 | ||
581 | /* create Optional trip hyst attribute */ | |
582 | if (!tz->ops->get_trip_hyst) | |
583 | continue; | |
584 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
585 | "trip_point_%d_hyst", indx); | |
586 | ||
587 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
588 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
589 | tz->trip_hyst_attrs[indx].name; | |
590 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
591 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
592 | if (tz->ops->set_trip_hyst) { | |
593 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
594 | tz->trip_hyst_attrs[indx].attr.store = | |
595 | trip_point_hyst_store; | |
596 | } | |
597 | attrs[indx + tz->trips * 2] = | |
598 | &tz->trip_hyst_attrs[indx].attr.attr; | |
599 | } | |
600 | attrs[tz->trips * 3] = NULL; | |
601 | ||
602 | tz->trips_attribute_group.attrs = attrs; | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
32fa5ba3 CJ |
607 | /** |
608 | * destroy_trip_attrs() - destroy attributes for trip points | |
609 | * @tz: the thermal zone device | |
610 | * | |
611 | * helper function to free resources allocated by create_trip_attrs() | |
612 | */ | |
613 | static void destroy_trip_attrs(struct thermal_zone_device *tz) | |
614 | { | |
615 | if (!tz) | |
616 | return; | |
617 | ||
618 | kfree(tz->trip_type_attrs); | |
619 | kfree(tz->trip_temp_attrs); | |
620 | if (tz->ops->get_trip_hyst) | |
621 | kfree(tz->trip_hyst_attrs); | |
622 | kfree(tz->trips_attribute_group.attrs); | |
623 | } | |
624 | ||
a369ee88 EV |
625 | int thermal_zone_create_device_groups(struct thermal_zone_device *tz, |
626 | int mask) | |
627 | { | |
628 | const struct attribute_group **groups; | |
629 | int i, size, result; | |
630 | ||
631 | /* we need one extra for trips and the NULL to terminate the array */ | |
632 | size = ARRAY_SIZE(thermal_zone_attribute_groups) + 2; | |
633 | /* This also takes care of API requirement to be NULL terminated */ | |
634 | groups = kcalloc(size, sizeof(*groups), GFP_KERNEL); | |
635 | if (!groups) | |
636 | return -ENOMEM; | |
637 | ||
638 | for (i = 0; i < size - 2; i++) | |
639 | groups[i] = thermal_zone_attribute_groups[i]; | |
640 | ||
641 | if (tz->trips) { | |
642 | result = create_trip_attrs(tz, mask); | |
643 | if (result) { | |
644 | kfree(groups); | |
645 | ||
646 | return result; | |
647 | } | |
648 | ||
649 | groups[size - 2] = &tz->trips_attribute_group; | |
650 | } | |
651 | ||
652 | tz->device.groups = groups; | |
653 | ||
654 | return 0; | |
655 | } | |
45cf2ec9 | 656 | |
32fa5ba3 CJ |
657 | void thermal_zone_destroy_device_groups(struct thermal_zone_device *tz) |
658 | { | |
659 | if (!tz) | |
660 | return; | |
661 | ||
662 | if (tz->trips) | |
663 | destroy_trip_attrs(tz); | |
664 | ||
665 | kfree(tz->device.groups); | |
666 | } | |
667 | ||
45cf2ec9 EV |
668 | /* sys I/F for cooling device */ |
669 | static ssize_t | |
670 | thermal_cooling_device_type_show(struct device *dev, | |
671 | struct device_attribute *attr, char *buf) | |
672 | { | |
673 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
674 | ||
675 | return sprintf(buf, "%s\n", cdev->type); | |
676 | } | |
677 | ||
678 | static ssize_t | |
679 | thermal_cooling_device_max_state_show(struct device *dev, | |
680 | struct device_attribute *attr, char *buf) | |
681 | { | |
682 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
683 | unsigned long state; | |
684 | int ret; | |
685 | ||
686 | ret = cdev->ops->get_max_state(cdev, &state); | |
687 | if (ret) | |
688 | return ret; | |
689 | return sprintf(buf, "%ld\n", state); | |
690 | } | |
691 | ||
692 | static ssize_t | |
693 | thermal_cooling_device_cur_state_show(struct device *dev, | |
694 | struct device_attribute *attr, char *buf) | |
695 | { | |
696 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
697 | unsigned long state; | |
698 | int ret; | |
699 | ||
700 | ret = cdev->ops->get_cur_state(cdev, &state); | |
701 | if (ret) | |
702 | return ret; | |
703 | return sprintf(buf, "%ld\n", state); | |
704 | } | |
705 | ||
706 | static ssize_t | |
707 | thermal_cooling_device_cur_state_store(struct device *dev, | |
708 | struct device_attribute *attr, | |
709 | const char *buf, size_t count) | |
710 | { | |
711 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
712 | unsigned long state; | |
713 | int result; | |
714 | ||
715 | if (sscanf(buf, "%ld\n", &state) != 1) | |
716 | return -EINVAL; | |
717 | ||
718 | if ((long)state < 0) | |
719 | return -EINVAL; | |
720 | ||
721 | result = cdev->ops->set_cur_state(cdev, state); | |
722 | if (result) | |
723 | return result; | |
724 | return count; | |
725 | } | |
726 | ||
727 | static struct device_attribute dev_attr_cdev_type = | |
728 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); | |
729 | static DEVICE_ATTR(max_state, 0444, | |
730 | thermal_cooling_device_max_state_show, NULL); | |
731 | static DEVICE_ATTR(cur_state, 0644, | |
732 | thermal_cooling_device_cur_state_show, | |
733 | thermal_cooling_device_cur_state_store); | |
734 | ||
735 | static struct attribute *cooling_device_attrs[] = { | |
736 | &dev_attr_cdev_type.attr, | |
737 | &dev_attr_max_state.attr, | |
738 | &dev_attr_cur_state.attr, | |
739 | NULL, | |
740 | }; | |
741 | ||
742 | static const struct attribute_group cooling_device_attr_group = { | |
743 | .attrs = cooling_device_attrs, | |
744 | }; | |
745 | ||
746 | static const struct attribute_group *cooling_device_attr_groups[] = { | |
747 | &cooling_device_attr_group, | |
748 | NULL, | |
749 | }; | |
750 | ||
751 | void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *cdev) | |
752 | { | |
753 | cdev->device.groups = cooling_device_attr_groups; | |
754 | } | |
755 | ||
756 | /* these helper will be used only at the time of bindig */ | |
757 | ssize_t | |
758 | thermal_cooling_device_trip_point_show(struct device *dev, | |
759 | struct device_attribute *attr, char *buf) | |
760 | { | |
761 | struct thermal_instance *instance; | |
762 | ||
763 | instance = | |
764 | container_of(attr, struct thermal_instance, attr); | |
765 | ||
766 | if (instance->trip == THERMAL_TRIPS_NONE) | |
767 | return sprintf(buf, "-1\n"); | |
768 | else | |
769 | return sprintf(buf, "%d\n", instance->trip); | |
770 | } | |
771 | ||
772 | ssize_t | |
773 | thermal_cooling_device_weight_show(struct device *dev, | |
774 | struct device_attribute *attr, char *buf) | |
775 | { | |
776 | struct thermal_instance *instance; | |
777 | ||
778 | instance = container_of(attr, struct thermal_instance, weight_attr); | |
779 | ||
780 | return sprintf(buf, "%d\n", instance->weight); | |
781 | } | |
782 | ||
783 | ssize_t | |
784 | thermal_cooling_device_weight_store(struct device *dev, | |
785 | struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
787 | { | |
788 | struct thermal_instance *instance; | |
789 | int ret, weight; | |
790 | ||
791 | ret = kstrtoint(buf, 0, &weight); | |
792 | if (ret) | |
793 | return ret; | |
794 | ||
795 | instance = container_of(attr, struct thermal_instance, weight_attr); | |
796 | instance->weight = weight; | |
797 | ||
798 | return count; | |
799 | } |