2 * thermal.c - Generic Thermal Management Sysfs support.
4 * Copyright (C) 2008 Intel Corp
5 * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
6 * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2 of the License.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28 #include <linux/module.h>
29 #include <linux/device.h>
30 #include <linux/err.h>
31 #include <linux/slab.h>
32 #include <linux/kdev_t.h>
33 #include <linux/idr.h>
34 #include <linux/thermal.h>
35 #include <linux/reboot.h>
36 #include <net/netlink.h>
37 #include <net/genetlink.h>
39 #include "thermal_core.h"
41 MODULE_AUTHOR("Zhang Rui");
42 MODULE_DESCRIPTION("Generic thermal management sysfs support");
43 MODULE_LICENSE("GPL");
45 static DEFINE_IDR(thermal_tz_idr
);
46 static DEFINE_IDR(thermal_cdev_idr
);
47 static DEFINE_MUTEX(thermal_idr_lock
);
49 static LIST_HEAD(thermal_tz_list
);
50 static LIST_HEAD(thermal_cdev_list
);
51 static LIST_HEAD(thermal_governor_list
);
53 static DEFINE_MUTEX(thermal_list_lock
);
54 static DEFINE_MUTEX(thermal_governor_lock
);
56 static struct thermal_governor
*__find_governor(const char *name
)
58 struct thermal_governor
*pos
;
60 list_for_each_entry(pos
, &thermal_governor_list
, governor_list
)
61 if (!strnicmp(name
, pos
->name
, THERMAL_NAME_LENGTH
))
67 int thermal_register_governor(struct thermal_governor
*governor
)
71 struct thermal_zone_device
*pos
;
76 mutex_lock(&thermal_governor_lock
);
79 if (__find_governor(governor
->name
) == NULL
) {
81 list_add(&governor
->governor_list
, &thermal_governor_list
);
84 mutex_lock(&thermal_list_lock
);
86 list_for_each_entry(pos
, &thermal_tz_list
, node
) {
90 name
= pos
->tzp
->governor_name
;
92 name
= DEFAULT_THERMAL_GOVERNOR
;
93 if (!strnicmp(name
, governor
->name
, THERMAL_NAME_LENGTH
))
94 pos
->governor
= governor
;
97 mutex_unlock(&thermal_list_lock
);
98 mutex_unlock(&thermal_governor_lock
);
102 EXPORT_SYMBOL_GPL(thermal_register_governor
);
104 void thermal_unregister_governor(struct thermal_governor
*governor
)
106 struct thermal_zone_device
*pos
;
111 mutex_lock(&thermal_governor_lock
);
113 if (__find_governor(governor
->name
) == NULL
)
116 mutex_lock(&thermal_list_lock
);
118 list_for_each_entry(pos
, &thermal_tz_list
, node
) {
119 if (!strnicmp(pos
->governor
->name
, governor
->name
,
120 THERMAL_NAME_LENGTH
))
121 pos
->governor
= NULL
;
124 mutex_unlock(&thermal_list_lock
);
125 list_del(&governor
->governor_list
);
127 mutex_unlock(&thermal_governor_lock
);
130 EXPORT_SYMBOL_GPL(thermal_unregister_governor
);
132 static int get_idr(struct idr
*idr
, struct mutex
*lock
, int *id
)
138 ret
= idr_alloc(idr
, NULL
, 0, 0, GFP_KERNEL
);
141 if (unlikely(ret
< 0))
147 static void release_idr(struct idr
*idr
, struct mutex
*lock
, int id
)
156 int get_tz_trend(struct thermal_zone_device
*tz
, int trip
)
158 enum thermal_trend trend
;
160 if (!tz
->ops
->get_trend
|| tz
->ops
->get_trend(tz
, trip
, &trend
)) {
161 if (tz
->temperature
> tz
->last_temperature
)
162 trend
= THERMAL_TREND_RAISING
;
163 else if (tz
->temperature
< tz
->last_temperature
)
164 trend
= THERMAL_TREND_DROPPING
;
166 trend
= THERMAL_TREND_STABLE
;
171 EXPORT_SYMBOL(get_tz_trend
);
173 struct thermal_instance
*get_thermal_instance(struct thermal_zone_device
*tz
,
174 struct thermal_cooling_device
*cdev
, int trip
)
176 struct thermal_instance
*pos
= NULL
;
177 struct thermal_instance
*target_instance
= NULL
;
179 mutex_lock(&tz
->lock
);
180 mutex_lock(&cdev
->lock
);
182 list_for_each_entry(pos
, &tz
->thermal_instances
, tz_node
) {
183 if (pos
->tz
== tz
&& pos
->trip
== trip
&& pos
->cdev
== cdev
) {
184 target_instance
= pos
;
189 mutex_unlock(&cdev
->lock
);
190 mutex_unlock(&tz
->lock
);
192 return target_instance
;
194 EXPORT_SYMBOL(get_thermal_instance
);
196 static void print_bind_err_msg(struct thermal_zone_device
*tz
,
197 struct thermal_cooling_device
*cdev
, int ret
)
199 dev_err(&tz
->device
, "binding zone %s with cdev %s failed:%d\n",
200 tz
->type
, cdev
->type
, ret
);
203 static void __bind(struct thermal_zone_device
*tz
, int mask
,
204 struct thermal_cooling_device
*cdev
)
208 for (i
= 0; i
< tz
->trips
; i
++) {
209 if (mask
& (1 << i
)) {
210 ret
= thermal_zone_bind_cooling_device(tz
, i
, cdev
,
211 THERMAL_NO_LIMIT
, THERMAL_NO_LIMIT
);
213 print_bind_err_msg(tz
, cdev
, ret
);
218 static void __unbind(struct thermal_zone_device
*tz
, int mask
,
219 struct thermal_cooling_device
*cdev
)
223 for (i
= 0; i
< tz
->trips
; i
++)
225 thermal_zone_unbind_cooling_device(tz
, i
, cdev
);
228 static void bind_cdev(struct thermal_cooling_device
*cdev
)
231 const struct thermal_zone_params
*tzp
;
232 struct thermal_zone_device
*pos
= NULL
;
234 mutex_lock(&thermal_list_lock
);
236 list_for_each_entry(pos
, &thermal_tz_list
, node
) {
237 if (!pos
->tzp
&& !pos
->ops
->bind
)
240 if (!pos
->tzp
&& pos
->ops
->bind
) {
241 ret
= pos
->ops
->bind(pos
, cdev
);
243 print_bind_err_msg(pos
, cdev
, ret
);
247 if (!tzp
|| !tzp
->tbp
)
250 for (i
= 0; i
< tzp
->num_tbps
; i
++) {
251 if (tzp
->tbp
[i
].cdev
|| !tzp
->tbp
[i
].match
)
253 if (tzp
->tbp
[i
].match(pos
, cdev
))
255 tzp
->tbp
[i
].cdev
= cdev
;
256 __bind(pos
, tzp
->tbp
[i
].trip_mask
, cdev
);
260 mutex_unlock(&thermal_list_lock
);
263 static void bind_tz(struct thermal_zone_device
*tz
)
266 struct thermal_cooling_device
*pos
= NULL
;
267 const struct thermal_zone_params
*tzp
= tz
->tzp
;
269 if (!tzp
&& !tz
->ops
->bind
)
272 mutex_lock(&thermal_list_lock
);
274 /* If there is no platform data, try to use ops->bind */
275 if (!tzp
&& tz
->ops
->bind
) {
276 list_for_each_entry(pos
, &thermal_cdev_list
, node
) {
277 ret
= tz
->ops
->bind(tz
, pos
);
279 print_bind_err_msg(tz
, pos
, ret
);
284 if (!tzp
|| !tzp
->tbp
)
287 list_for_each_entry(pos
, &thermal_cdev_list
, node
) {
288 for (i
= 0; i
< tzp
->num_tbps
; i
++) {
289 if (tzp
->tbp
[i
].cdev
|| !tzp
->tbp
[i
].match
)
291 if (tzp
->tbp
[i
].match(tz
, pos
))
293 tzp
->tbp
[i
].cdev
= pos
;
294 __bind(tz
, tzp
->tbp
[i
].trip_mask
, pos
);
298 mutex_unlock(&thermal_list_lock
);
301 static void thermal_zone_device_set_polling(struct thermal_zone_device
*tz
,
305 mod_delayed_work(system_freezable_wq
, &tz
->poll_queue
,
306 round_jiffies(msecs_to_jiffies(delay
)));
308 mod_delayed_work(system_freezable_wq
, &tz
->poll_queue
,
309 msecs_to_jiffies(delay
));
311 cancel_delayed_work(&tz
->poll_queue
);
314 static void monitor_thermal_zone(struct thermal_zone_device
*tz
)
316 mutex_lock(&tz
->lock
);
319 thermal_zone_device_set_polling(tz
, tz
->passive_delay
);
320 else if (tz
->polling_delay
)
321 thermal_zone_device_set_polling(tz
, tz
->polling_delay
);
323 thermal_zone_device_set_polling(tz
, 0);
325 mutex_unlock(&tz
->lock
);
328 static void handle_non_critical_trips(struct thermal_zone_device
*tz
,
329 int trip
, enum thermal_trip_type trip_type
)
332 tz
->governor
->throttle(tz
, trip
);
335 static void handle_critical_trips(struct thermal_zone_device
*tz
,
336 int trip
, enum thermal_trip_type trip_type
)
340 tz
->ops
->get_trip_temp(tz
, trip
, &trip_temp
);
342 /* If we have not crossed the trip_temp, we do not care. */
343 if (tz
->temperature
< trip_temp
)
347 tz
->ops
->notify(tz
, trip
, trip_type
);
349 if (trip_type
== THERMAL_TRIP_CRITICAL
) {
350 dev_emerg(&tz
->device
,
351 "critical temperature reached(%d C),shutting down\n",
352 tz
->temperature
/ 1000);
353 orderly_poweroff(true);
357 static void handle_thermal_trip(struct thermal_zone_device
*tz
, int trip
)
359 enum thermal_trip_type type
;
361 tz
->ops
->get_trip_type(tz
, trip
, &type
);
363 if (type
== THERMAL_TRIP_CRITICAL
|| type
== THERMAL_TRIP_HOT
)
364 handle_critical_trips(tz
, trip
, type
);
366 handle_non_critical_trips(tz
, trip
, type
);
368 * Alright, we handled this trip successfully.
369 * So, start monitoring again.
371 monitor_thermal_zone(tz
);
374 static int thermal_zone_get_temp(struct thermal_zone_device
*tz
,
378 #ifdef CONFIG_THERMAL_EMULATION
380 unsigned long crit_temp
= -1UL;
381 enum thermal_trip_type type
;
384 mutex_lock(&tz
->lock
);
386 ret
= tz
->ops
->get_temp(tz
, temp
);
387 #ifdef CONFIG_THERMAL_EMULATION
388 if (!tz
->emul_temperature
)
391 for (count
= 0; count
< tz
->trips
; count
++) {
392 ret
= tz
->ops
->get_trip_type(tz
, count
, &type
);
393 if (!ret
&& type
== THERMAL_TRIP_CRITICAL
) {
394 ret
= tz
->ops
->get_trip_temp(tz
, count
, &crit_temp
);
402 if (*temp
< crit_temp
)
403 *temp
= tz
->emul_temperature
;
406 mutex_unlock(&tz
->lock
);
410 static void update_temperature(struct thermal_zone_device
*tz
)
415 ret
= thermal_zone_get_temp(tz
, &temp
);
417 dev_warn(&tz
->device
, "failed to read out thermal zone %d\n",
422 mutex_lock(&tz
->lock
);
423 tz
->last_temperature
= tz
->temperature
;
424 tz
->temperature
= temp
;
425 mutex_unlock(&tz
->lock
);
428 void thermal_zone_device_update(struct thermal_zone_device
*tz
)
432 update_temperature(tz
);
434 for (count
= 0; count
< tz
->trips
; count
++)
435 handle_thermal_trip(tz
, count
);
437 EXPORT_SYMBOL(thermal_zone_device_update
);
439 static void thermal_zone_device_check(struct work_struct
*work
)
441 struct thermal_zone_device
*tz
= container_of(work
, struct
444 thermal_zone_device_update(tz
);
447 /* sys I/F for thermal zone */
449 #define to_thermal_zone(_dev) \
450 container_of(_dev, struct thermal_zone_device, device)
453 type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
455 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
457 return sprintf(buf
, "%s\n", tz
->type
);
461 temp_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
463 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
467 ret
= thermal_zone_get_temp(tz
, &temperature
);
472 return sprintf(buf
, "%ld\n", temperature
);
476 mode_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
478 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
479 enum thermal_device_mode mode
;
482 if (!tz
->ops
->get_mode
)
485 result
= tz
->ops
->get_mode(tz
, &mode
);
489 return sprintf(buf
, "%s\n", mode
== THERMAL_DEVICE_ENABLED
? "enabled"
494 mode_store(struct device
*dev
, struct device_attribute
*attr
,
495 const char *buf
, size_t count
)
497 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
500 if (!tz
->ops
->set_mode
)
503 if (!strncmp(buf
, "enabled", sizeof("enabled") - 1))
504 result
= tz
->ops
->set_mode(tz
, THERMAL_DEVICE_ENABLED
);
505 else if (!strncmp(buf
, "disabled", sizeof("disabled") - 1))
506 result
= tz
->ops
->set_mode(tz
, THERMAL_DEVICE_DISABLED
);
517 trip_point_type_show(struct device
*dev
, struct device_attribute
*attr
,
520 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
521 enum thermal_trip_type type
;
524 if (!tz
->ops
->get_trip_type
)
527 if (!sscanf(attr
->attr
.name
, "trip_point_%d_type", &trip
))
530 result
= tz
->ops
->get_trip_type(tz
, trip
, &type
);
535 case THERMAL_TRIP_CRITICAL
:
536 return sprintf(buf
, "critical\n");
537 case THERMAL_TRIP_HOT
:
538 return sprintf(buf
, "hot\n");
539 case THERMAL_TRIP_PASSIVE
:
540 return sprintf(buf
, "passive\n");
541 case THERMAL_TRIP_ACTIVE
:
542 return sprintf(buf
, "active\n");
544 return sprintf(buf
, "unknown\n");
549 trip_point_temp_store(struct device
*dev
, struct device_attribute
*attr
,
550 const char *buf
, size_t count
)
552 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
554 unsigned long temperature
;
556 if (!tz
->ops
->set_trip_temp
)
559 if (!sscanf(attr
->attr
.name
, "trip_point_%d_temp", &trip
))
562 if (kstrtoul(buf
, 10, &temperature
))
565 ret
= tz
->ops
->set_trip_temp(tz
, trip
, temperature
);
567 return ret
? ret
: count
;
571 trip_point_temp_show(struct device
*dev
, struct device_attribute
*attr
,
574 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
578 if (!tz
->ops
->get_trip_temp
)
581 if (!sscanf(attr
->attr
.name
, "trip_point_%d_temp", &trip
))
584 ret
= tz
->ops
->get_trip_temp(tz
, trip
, &temperature
);
589 return sprintf(buf
, "%ld\n", temperature
);
593 trip_point_hyst_store(struct device
*dev
, struct device_attribute
*attr
,
594 const char *buf
, size_t count
)
596 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
598 unsigned long temperature
;
600 if (!tz
->ops
->set_trip_hyst
)
603 if (!sscanf(attr
->attr
.name
, "trip_point_%d_hyst", &trip
))
606 if (kstrtoul(buf
, 10, &temperature
))
610 * We are not doing any check on the 'temperature' value
611 * here. The driver implementing 'set_trip_hyst' has to
614 ret
= tz
->ops
->set_trip_hyst(tz
, trip
, temperature
);
616 return ret
? ret
: count
;
620 trip_point_hyst_show(struct device
*dev
, struct device_attribute
*attr
,
623 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
625 unsigned long temperature
;
627 if (!tz
->ops
->get_trip_hyst
)
630 if (!sscanf(attr
->attr
.name
, "trip_point_%d_hyst", &trip
))
633 ret
= tz
->ops
->get_trip_hyst(tz
, trip
, &temperature
);
635 return ret
? ret
: sprintf(buf
, "%ld\n", temperature
);
639 passive_store(struct device
*dev
, struct device_attribute
*attr
,
640 const char *buf
, size_t count
)
642 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
643 struct thermal_cooling_device
*cdev
= NULL
;
646 if (!sscanf(buf
, "%d\n", &state
))
649 /* sanity check: values below 1000 millicelcius don't make sense
650 * and can cause the system to go into a thermal heart attack
652 if (state
&& state
< 1000)
655 if (state
&& !tz
->forced_passive
) {
656 mutex_lock(&thermal_list_lock
);
657 list_for_each_entry(cdev
, &thermal_cdev_list
, node
) {
658 if (!strncmp("Processor", cdev
->type
,
659 sizeof("Processor")))
660 thermal_zone_bind_cooling_device(tz
,
661 THERMAL_TRIPS_NONE
, cdev
,
665 mutex_unlock(&thermal_list_lock
);
666 if (!tz
->passive_delay
)
667 tz
->passive_delay
= 1000;
668 } else if (!state
&& tz
->forced_passive
) {
669 mutex_lock(&thermal_list_lock
);
670 list_for_each_entry(cdev
, &thermal_cdev_list
, node
) {
671 if (!strncmp("Processor", cdev
->type
,
672 sizeof("Processor")))
673 thermal_zone_unbind_cooling_device(tz
,
677 mutex_unlock(&thermal_list_lock
);
678 tz
->passive_delay
= 0;
681 tz
->forced_passive
= state
;
683 thermal_zone_device_update(tz
);
689 passive_show(struct device
*dev
, struct device_attribute
*attr
,
692 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
694 return sprintf(buf
, "%d\n", tz
->forced_passive
);
698 policy_store(struct device
*dev
, struct device_attribute
*attr
,
699 const char *buf
, size_t count
)
702 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
703 struct thermal_governor
*gov
;
705 mutex_lock(&thermal_governor_lock
);
707 gov
= __find_governor(buf
);
715 mutex_unlock(&thermal_governor_lock
);
720 policy_show(struct device
*dev
, struct device_attribute
*devattr
, char *buf
)
722 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
724 return sprintf(buf
, "%s\n", tz
->governor
->name
);
727 #ifdef CONFIG_THERMAL_EMULATION
729 emul_temp_store(struct device
*dev
, struct device_attribute
*attr
,
730 const char *buf
, size_t count
)
732 struct thermal_zone_device
*tz
= to_thermal_zone(dev
);
734 unsigned long temperature
;
736 if (kstrtoul(buf
, 10, &temperature
))
739 if (!tz
->ops
->set_emul_temp
) {
740 mutex_lock(&tz
->lock
);
741 tz
->emul_temperature
= temperature
;
742 mutex_unlock(&tz
->lock
);
744 ret
= tz
->ops
->set_emul_temp(tz
, temperature
);
747 return ret
? ret
: count
;
749 static DEVICE_ATTR(emul_temp
, S_IWUSR
, NULL
, emul_temp_store
);
750 #endif/*CONFIG_THERMAL_EMULATION*/
752 static DEVICE_ATTR(type
, 0444, type_show
, NULL
);
753 static DEVICE_ATTR(temp
, 0444, temp_show
, NULL
);
754 static DEVICE_ATTR(mode
, 0644, mode_show
, mode_store
);
755 static DEVICE_ATTR(passive
, S_IRUGO
| S_IWUSR
, passive_show
, passive_store
);
756 static DEVICE_ATTR(policy
, S_IRUGO
| S_IWUSR
, policy_show
, policy_store
);
758 /* sys I/F for cooling device */
759 #define to_cooling_device(_dev) \
760 container_of(_dev, struct thermal_cooling_device, device)
763 thermal_cooling_device_type_show(struct device
*dev
,
764 struct device_attribute
*attr
, char *buf
)
766 struct thermal_cooling_device
*cdev
= to_cooling_device(dev
);
768 return sprintf(buf
, "%s\n", cdev
->type
);
772 thermal_cooling_device_max_state_show(struct device
*dev
,
773 struct device_attribute
*attr
, char *buf
)
775 struct thermal_cooling_device
*cdev
= to_cooling_device(dev
);
779 ret
= cdev
->ops
->get_max_state(cdev
, &state
);
782 return sprintf(buf
, "%ld\n", state
);
786 thermal_cooling_device_cur_state_show(struct device
*dev
,
787 struct device_attribute
*attr
, char *buf
)
789 struct thermal_cooling_device
*cdev
= to_cooling_device(dev
);
793 ret
= cdev
->ops
->get_cur_state(cdev
, &state
);
796 return sprintf(buf
, "%ld\n", state
);
800 thermal_cooling_device_cur_state_store(struct device
*dev
,
801 struct device_attribute
*attr
,
802 const char *buf
, size_t count
)
804 struct thermal_cooling_device
*cdev
= to_cooling_device(dev
);
808 if (!sscanf(buf
, "%ld\n", &state
))
814 result
= cdev
->ops
->set_cur_state(cdev
, state
);
820 static struct device_attribute dev_attr_cdev_type
=
821 __ATTR(type
, 0444, thermal_cooling_device_type_show
, NULL
);
822 static DEVICE_ATTR(max_state
, 0444,
823 thermal_cooling_device_max_state_show
, NULL
);
824 static DEVICE_ATTR(cur_state
, 0644,
825 thermal_cooling_device_cur_state_show
,
826 thermal_cooling_device_cur_state_store
);
829 thermal_cooling_device_trip_point_show(struct device
*dev
,
830 struct device_attribute
*attr
, char *buf
)
832 struct thermal_instance
*instance
;
835 container_of(attr
, struct thermal_instance
, attr
);
837 if (instance
->trip
== THERMAL_TRIPS_NONE
)
838 return sprintf(buf
, "-1\n");
840 return sprintf(buf
, "%d\n", instance
->trip
);
843 /* Device management */
845 #if defined(CONFIG_THERMAL_HWMON)
848 #include <linux/hwmon.h>
850 /* thermal zone devices with the same type share one hwmon device */
851 struct thermal_hwmon_device
{
852 char type
[THERMAL_NAME_LENGTH
];
853 struct device
*device
;
855 struct list_head tz_list
;
856 struct list_head node
;
859 struct thermal_hwmon_attr
{
860 struct device_attribute attr
;
864 /* one temperature input for each thermal zone */
865 struct thermal_hwmon_temp
{
866 struct list_head hwmon_node
;
867 struct thermal_zone_device
*tz
;
868 struct thermal_hwmon_attr temp_input
; /* hwmon sys attr */
869 struct thermal_hwmon_attr temp_crit
; /* hwmon sys attr */
872 static LIST_HEAD(thermal_hwmon_list
);
875 name_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
877 struct thermal_hwmon_device
*hwmon
= dev_get_drvdata(dev
);
878 return sprintf(buf
, "%s\n", hwmon
->type
);
880 static DEVICE_ATTR(name
, 0444, name_show
, NULL
);
883 temp_input_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
887 struct thermal_hwmon_attr
*hwmon_attr
888 = container_of(attr
, struct thermal_hwmon_attr
, attr
);
889 struct thermal_hwmon_temp
*temp
890 = container_of(hwmon_attr
, struct thermal_hwmon_temp
,
892 struct thermal_zone_device
*tz
= temp
->tz
;
894 ret
= thermal_zone_get_temp(tz
, &temperature
);
899 return sprintf(buf
, "%ld\n", temperature
);
903 temp_crit_show(struct device
*dev
, struct device_attribute
*attr
,
906 struct thermal_hwmon_attr
*hwmon_attr
907 = container_of(attr
, struct thermal_hwmon_attr
, attr
);
908 struct thermal_hwmon_temp
*temp
909 = container_of(hwmon_attr
, struct thermal_hwmon_temp
,
911 struct thermal_zone_device
*tz
= temp
->tz
;
915 ret
= tz
->ops
->get_trip_temp(tz
, 0, &temperature
);
919 return sprintf(buf
, "%ld\n", temperature
);
923 static struct thermal_hwmon_device
*
924 thermal_hwmon_lookup_by_type(const struct thermal_zone_device
*tz
)
926 struct thermal_hwmon_device
*hwmon
;
928 mutex_lock(&thermal_list_lock
);
929 list_for_each_entry(hwmon
, &thermal_hwmon_list
, node
)
930 if (!strcmp(hwmon
->type
, tz
->type
)) {
931 mutex_unlock(&thermal_list_lock
);
934 mutex_unlock(&thermal_list_lock
);
939 /* Find the temperature input matching a given thermal zone */
940 static struct thermal_hwmon_temp
*
941 thermal_hwmon_lookup_temp(const struct thermal_hwmon_device
*hwmon
,
942 const struct thermal_zone_device
*tz
)
944 struct thermal_hwmon_temp
*temp
;
946 mutex_lock(&thermal_list_lock
);
947 list_for_each_entry(temp
, &hwmon
->tz_list
, hwmon_node
)
948 if (temp
->tz
== tz
) {
949 mutex_unlock(&thermal_list_lock
);
952 mutex_unlock(&thermal_list_lock
);
958 thermal_add_hwmon_sysfs(struct thermal_zone_device
*tz
)
960 struct thermal_hwmon_device
*hwmon
;
961 struct thermal_hwmon_temp
*temp
;
962 int new_hwmon_device
= 1;
965 hwmon
= thermal_hwmon_lookup_by_type(tz
);
967 new_hwmon_device
= 0;
968 goto register_sys_interface
;
971 hwmon
= kzalloc(sizeof(struct thermal_hwmon_device
), GFP_KERNEL
);
975 INIT_LIST_HEAD(&hwmon
->tz_list
);
976 strlcpy(hwmon
->type
, tz
->type
, THERMAL_NAME_LENGTH
);
977 hwmon
->device
= hwmon_device_register(NULL
);
978 if (IS_ERR(hwmon
->device
)) {
979 result
= PTR_ERR(hwmon
->device
);
982 dev_set_drvdata(hwmon
->device
, hwmon
);
983 result
= device_create_file(hwmon
->device
, &dev_attr_name
);
987 register_sys_interface
:
988 temp
= kzalloc(sizeof(struct thermal_hwmon_temp
), GFP_KERNEL
);
991 goto unregister_name
;
997 snprintf(temp
->temp_input
.name
, sizeof(temp
->temp_input
.name
),
998 "temp%d_input", hwmon
->count
);
999 temp
->temp_input
.attr
.attr
.name
= temp
->temp_input
.name
;
1000 temp
->temp_input
.attr
.attr
.mode
= 0444;
1001 temp
->temp_input
.attr
.show
= temp_input_show
;
1002 sysfs_attr_init(&temp
->temp_input
.attr
.attr
);
1003 result
= device_create_file(hwmon
->device
, &temp
->temp_input
.attr
);
1007 if (tz
->ops
->get_crit_temp
) {
1008 unsigned long temperature
;
1009 if (!tz
->ops
->get_crit_temp(tz
, &temperature
)) {
1010 snprintf(temp
->temp_crit
.name
,
1011 sizeof(temp
->temp_crit
.name
),
1012 "temp%d_crit", hwmon
->count
);
1013 temp
->temp_crit
.attr
.attr
.name
= temp
->temp_crit
.name
;
1014 temp
->temp_crit
.attr
.attr
.mode
= 0444;
1015 temp
->temp_crit
.attr
.show
= temp_crit_show
;
1016 sysfs_attr_init(&temp
->temp_crit
.attr
.attr
);
1017 result
= device_create_file(hwmon
->device
,
1018 &temp
->temp_crit
.attr
);
1020 goto unregister_input
;
1024 mutex_lock(&thermal_list_lock
);
1025 if (new_hwmon_device
)
1026 list_add_tail(&hwmon
->node
, &thermal_hwmon_list
);
1027 list_add_tail(&temp
->hwmon_node
, &hwmon
->tz_list
);
1028 mutex_unlock(&thermal_list_lock
);
1033 device_remove_file(hwmon
->device
, &temp
->temp_input
.attr
);
1037 if (new_hwmon_device
) {
1038 device_remove_file(hwmon
->device
, &dev_attr_name
);
1039 hwmon_device_unregister(hwmon
->device
);
1042 if (new_hwmon_device
)
1049 thermal_remove_hwmon_sysfs(struct thermal_zone_device
*tz
)
1051 struct thermal_hwmon_device
*hwmon
;
1052 struct thermal_hwmon_temp
*temp
;
1054 hwmon
= thermal_hwmon_lookup_by_type(tz
);
1055 if (unlikely(!hwmon
)) {
1056 /* Should never happen... */
1057 dev_dbg(&tz
->device
, "hwmon device lookup failed!\n");
1061 temp
= thermal_hwmon_lookup_temp(hwmon
, tz
);
1062 if (unlikely(!temp
)) {
1063 /* Should never happen... */
1064 dev_dbg(&tz
->device
, "temperature input lookup failed!\n");
1068 device_remove_file(hwmon
->device
, &temp
->temp_input
.attr
);
1069 if (tz
->ops
->get_crit_temp
)
1070 device_remove_file(hwmon
->device
, &temp
->temp_crit
.attr
);
1072 mutex_lock(&thermal_list_lock
);
1073 list_del(&temp
->hwmon_node
);
1075 if (!list_empty(&hwmon
->tz_list
)) {
1076 mutex_unlock(&thermal_list_lock
);
1079 list_del(&hwmon
->node
);
1080 mutex_unlock(&thermal_list_lock
);
1082 device_remove_file(hwmon
->device
, &dev_attr_name
);
1083 hwmon_device_unregister(hwmon
->device
);
1088 thermal_add_hwmon_sysfs(struct thermal_zone_device
*tz
)
1094 thermal_remove_hwmon_sysfs(struct thermal_zone_device
*tz
)
1100 * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
1101 * @tz: thermal zone device
1102 * @trip: indicates which trip point the cooling devices is
1103 * associated with in this thermal zone.
1104 * @cdev: thermal cooling device
1106 * This function is usually called in the thermal zone device .bind callback.
1108 int thermal_zone_bind_cooling_device(struct thermal_zone_device
*tz
,
1110 struct thermal_cooling_device
*cdev
,
1111 unsigned long upper
, unsigned long lower
)
1113 struct thermal_instance
*dev
;
1114 struct thermal_instance
*pos
;
1115 struct thermal_zone_device
*pos1
;
1116 struct thermal_cooling_device
*pos2
;
1117 unsigned long max_state
;
1120 if (trip
>= tz
->trips
|| (trip
< 0 && trip
!= THERMAL_TRIPS_NONE
))
1123 list_for_each_entry(pos1
, &thermal_tz_list
, node
) {
1127 list_for_each_entry(pos2
, &thermal_cdev_list
, node
) {
1132 if (tz
!= pos1
|| cdev
!= pos2
)
1135 cdev
->ops
->get_max_state(cdev
, &max_state
);
1137 /* lower default 0, upper default max_state */
1138 lower
= lower
== THERMAL_NO_LIMIT
? 0 : lower
;
1139 upper
= upper
== THERMAL_NO_LIMIT
? max_state
: upper
;
1141 if (lower
> upper
|| upper
> max_state
)
1145 kzalloc(sizeof(struct thermal_instance
), GFP_KERNEL
);
1153 dev
->target
= THERMAL_NO_TARGET
;
1155 result
= get_idr(&tz
->idr
, &tz
->lock
, &dev
->id
);
1159 sprintf(dev
->name
, "cdev%d", dev
->id
);
1161 sysfs_create_link(&tz
->device
.kobj
, &cdev
->device
.kobj
, dev
->name
);
1165 sprintf(dev
->attr_name
, "cdev%d_trip_point", dev
->id
);
1166 sysfs_attr_init(&dev
->attr
.attr
);
1167 dev
->attr
.attr
.name
= dev
->attr_name
;
1168 dev
->attr
.attr
.mode
= 0444;
1169 dev
->attr
.show
= thermal_cooling_device_trip_point_show
;
1170 result
= device_create_file(&tz
->device
, &dev
->attr
);
1172 goto remove_symbol_link
;
1174 mutex_lock(&tz
->lock
);
1175 mutex_lock(&cdev
->lock
);
1176 list_for_each_entry(pos
, &tz
->thermal_instances
, tz_node
)
1177 if (pos
->tz
== tz
&& pos
->trip
== trip
&& pos
->cdev
== cdev
) {
1182 list_add_tail(&dev
->tz_node
, &tz
->thermal_instances
);
1183 list_add_tail(&dev
->cdev_node
, &cdev
->thermal_instances
);
1185 mutex_unlock(&cdev
->lock
);
1186 mutex_unlock(&tz
->lock
);
1191 device_remove_file(&tz
->device
, &dev
->attr
);
1193 sysfs_remove_link(&tz
->device
.kobj
, dev
->name
);
1195 release_idr(&tz
->idr
, &tz
->lock
, dev
->id
);
1200 EXPORT_SYMBOL(thermal_zone_bind_cooling_device
);
1203 * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
1204 * @tz: thermal zone device
1205 * @trip: indicates which trip point the cooling devices is
1206 * associated with in this thermal zone.
1207 * @cdev: thermal cooling device
1209 * This function is usually called in the thermal zone device .unbind callback.
1211 int thermal_zone_unbind_cooling_device(struct thermal_zone_device
*tz
,
1213 struct thermal_cooling_device
*cdev
)
1215 struct thermal_instance
*pos
, *next
;
1217 mutex_lock(&tz
->lock
);
1218 mutex_lock(&cdev
->lock
);
1219 list_for_each_entry_safe(pos
, next
, &tz
->thermal_instances
, tz_node
) {
1220 if (pos
->tz
== tz
&& pos
->trip
== trip
&& pos
->cdev
== cdev
) {
1221 list_del(&pos
->tz_node
);
1222 list_del(&pos
->cdev_node
);
1223 mutex_unlock(&cdev
->lock
);
1224 mutex_unlock(&tz
->lock
);
1228 mutex_unlock(&cdev
->lock
);
1229 mutex_unlock(&tz
->lock
);
1234 device_remove_file(&tz
->device
, &pos
->attr
);
1235 sysfs_remove_link(&tz
->device
.kobj
, pos
->name
);
1236 release_idr(&tz
->idr
, &tz
->lock
, pos
->id
);
1240 EXPORT_SYMBOL(thermal_zone_unbind_cooling_device
);
1242 static void thermal_release(struct device
*dev
)
1244 struct thermal_zone_device
*tz
;
1245 struct thermal_cooling_device
*cdev
;
1247 if (!strncmp(dev_name(dev
), "thermal_zone",
1248 sizeof("thermal_zone") - 1)) {
1249 tz
= to_thermal_zone(dev
);
1252 cdev
= to_cooling_device(dev
);
1257 static struct class thermal_class
= {
1259 .dev_release
= thermal_release
,
1263 * thermal_cooling_device_register - register a new thermal cooling device
1264 * @type: the thermal cooling device type.
1265 * @devdata: device private data.
1266 * @ops: standard thermal cooling devices callbacks.
1268 struct thermal_cooling_device
*
1269 thermal_cooling_device_register(char *type
, void *devdata
,
1270 const struct thermal_cooling_device_ops
*ops
)
1272 struct thermal_cooling_device
*cdev
;
1275 if (type
&& strlen(type
) >= THERMAL_NAME_LENGTH
)
1276 return ERR_PTR(-EINVAL
);
1278 if (!ops
|| !ops
->get_max_state
|| !ops
->get_cur_state
||
1279 !ops
->set_cur_state
)
1280 return ERR_PTR(-EINVAL
);
1282 cdev
= kzalloc(sizeof(struct thermal_cooling_device
), GFP_KERNEL
);
1284 return ERR_PTR(-ENOMEM
);
1286 result
= get_idr(&thermal_cdev_idr
, &thermal_idr_lock
, &cdev
->id
);
1289 return ERR_PTR(result
);
1292 strcpy(cdev
->type
, type
? : "");
1293 mutex_init(&cdev
->lock
);
1294 INIT_LIST_HEAD(&cdev
->thermal_instances
);
1296 cdev
->updated
= true;
1297 cdev
->device
.class = &thermal_class
;
1298 cdev
->devdata
= devdata
;
1299 dev_set_name(&cdev
->device
, "cooling_device%d", cdev
->id
);
1300 result
= device_register(&cdev
->device
);
1302 release_idr(&thermal_cdev_idr
, &thermal_idr_lock
, cdev
->id
);
1304 return ERR_PTR(result
);
1309 result
= device_create_file(&cdev
->device
, &dev_attr_cdev_type
);
1314 result
= device_create_file(&cdev
->device
, &dev_attr_max_state
);
1318 result
= device_create_file(&cdev
->device
, &dev_attr_cur_state
);
1322 /* Add 'this' new cdev to the global cdev list */
1323 mutex_lock(&thermal_list_lock
);
1324 list_add(&cdev
->node
, &thermal_cdev_list
);
1325 mutex_unlock(&thermal_list_lock
);
1327 /* Update binding information for 'this' new cdev */
1333 release_idr(&thermal_cdev_idr
, &thermal_idr_lock
, cdev
->id
);
1334 device_unregister(&cdev
->device
);
1335 return ERR_PTR(result
);
1337 EXPORT_SYMBOL(thermal_cooling_device_register
);
1340 * thermal_cooling_device_unregister - removes the registered thermal cooling device
1341 * @cdev: the thermal cooling device to remove.
1343 * thermal_cooling_device_unregister() must be called when the device is no
1346 void thermal_cooling_device_unregister(struct thermal_cooling_device
*cdev
)
1349 const struct thermal_zone_params
*tzp
;
1350 struct thermal_zone_device
*tz
;
1351 struct thermal_cooling_device
*pos
= NULL
;
1356 mutex_lock(&thermal_list_lock
);
1357 list_for_each_entry(pos
, &thermal_cdev_list
, node
)
1361 /* thermal cooling device not found */
1362 mutex_unlock(&thermal_list_lock
);
1365 list_del(&cdev
->node
);
1367 /* Unbind all thermal zones associated with 'this' cdev */
1368 list_for_each_entry(tz
, &thermal_tz_list
, node
) {
1369 if (tz
->ops
->unbind
) {
1370 tz
->ops
->unbind(tz
, cdev
);
1374 if (!tz
->tzp
|| !tz
->tzp
->tbp
)
1378 for (i
= 0; i
< tzp
->num_tbps
; i
++) {
1379 if (tzp
->tbp
[i
].cdev
== cdev
) {
1380 __unbind(tz
, tzp
->tbp
[i
].trip_mask
, cdev
);
1381 tzp
->tbp
[i
].cdev
= NULL
;
1386 mutex_unlock(&thermal_list_lock
);
1389 device_remove_file(&cdev
->device
, &dev_attr_cdev_type
);
1390 device_remove_file(&cdev
->device
, &dev_attr_max_state
);
1391 device_remove_file(&cdev
->device
, &dev_attr_cur_state
);
1393 release_idr(&thermal_cdev_idr
, &thermal_idr_lock
, cdev
->id
);
1394 device_unregister(&cdev
->device
);
1397 EXPORT_SYMBOL(thermal_cooling_device_unregister
);
1399 void thermal_cdev_update(struct thermal_cooling_device
*cdev
)
1401 struct thermal_instance
*instance
;
1402 unsigned long target
= 0;
1404 /* cooling device is updated*/
1408 mutex_lock(&cdev
->lock
);
1409 /* Make sure cdev enters the deepest cooling state */
1410 list_for_each_entry(instance
, &cdev
->thermal_instances
, cdev_node
) {
1411 if (instance
->target
== THERMAL_NO_TARGET
)
1413 if (instance
->target
> target
)
1414 target
= instance
->target
;
1416 mutex_unlock(&cdev
->lock
);
1417 cdev
->ops
->set_cur_state(cdev
, target
);
1418 cdev
->updated
= true;
1420 EXPORT_SYMBOL(thermal_cdev_update
);
1423 * notify_thermal_framework - Sensor drivers use this API to notify framework
1424 * @tz: thermal zone device
1425 * @trip: indicates which trip point has been crossed
1427 * This function handles the trip events from sensor drivers. It starts
1428 * throttling the cooling devices according to the policy configured.
1429 * For CRITICAL and HOT trip points, this notifies the respective drivers,
1430 * and does actual throttling for other trip points i.e ACTIVE and PASSIVE.
1431 * The throttling policy is based on the configured platform data; if no
1432 * platform data is provided, this uses the step_wise throttling policy.
1434 void notify_thermal_framework(struct thermal_zone_device
*tz
, int trip
)
1436 handle_thermal_trip(tz
, trip
);
1438 EXPORT_SYMBOL(notify_thermal_framework
);
1441 * create_trip_attrs - create attributes for trip points
1442 * @tz: the thermal zone device
1443 * @mask: Writeable trip point bitmap.
1445 static int create_trip_attrs(struct thermal_zone_device
*tz
, int mask
)
1448 int size
= sizeof(struct thermal_attr
) * tz
->trips
;
1450 tz
->trip_type_attrs
= kzalloc(size
, GFP_KERNEL
);
1451 if (!tz
->trip_type_attrs
)
1454 tz
->trip_temp_attrs
= kzalloc(size
, GFP_KERNEL
);
1455 if (!tz
->trip_temp_attrs
) {
1456 kfree(tz
->trip_type_attrs
);
1460 if (tz
->ops
->get_trip_hyst
) {
1461 tz
->trip_hyst_attrs
= kzalloc(size
, GFP_KERNEL
);
1462 if (!tz
->trip_hyst_attrs
) {
1463 kfree(tz
->trip_type_attrs
);
1464 kfree(tz
->trip_temp_attrs
);
1470 for (indx
= 0; indx
< tz
->trips
; indx
++) {
1471 /* create trip type attribute */
1472 snprintf(tz
->trip_type_attrs
[indx
].name
, THERMAL_NAME_LENGTH
,
1473 "trip_point_%d_type", indx
);
1475 sysfs_attr_init(&tz
->trip_type_attrs
[indx
].attr
.attr
);
1476 tz
->trip_type_attrs
[indx
].attr
.attr
.name
=
1477 tz
->trip_type_attrs
[indx
].name
;
1478 tz
->trip_type_attrs
[indx
].attr
.attr
.mode
= S_IRUGO
;
1479 tz
->trip_type_attrs
[indx
].attr
.show
= trip_point_type_show
;
1481 device_create_file(&tz
->device
,
1482 &tz
->trip_type_attrs
[indx
].attr
);
1484 /* create trip temp attribute */
1485 snprintf(tz
->trip_temp_attrs
[indx
].name
, THERMAL_NAME_LENGTH
,
1486 "trip_point_%d_temp", indx
);
1488 sysfs_attr_init(&tz
->trip_temp_attrs
[indx
].attr
.attr
);
1489 tz
->trip_temp_attrs
[indx
].attr
.attr
.name
=
1490 tz
->trip_temp_attrs
[indx
].name
;
1491 tz
->trip_temp_attrs
[indx
].attr
.attr
.mode
= S_IRUGO
;
1492 tz
->trip_temp_attrs
[indx
].attr
.show
= trip_point_temp_show
;
1493 if (mask
& (1 << indx
)) {
1494 tz
->trip_temp_attrs
[indx
].attr
.attr
.mode
|= S_IWUSR
;
1495 tz
->trip_temp_attrs
[indx
].attr
.store
=
1496 trip_point_temp_store
;
1499 device_create_file(&tz
->device
,
1500 &tz
->trip_temp_attrs
[indx
].attr
);
1502 /* create Optional trip hyst attribute */
1503 if (!tz
->ops
->get_trip_hyst
)
1505 snprintf(tz
->trip_hyst_attrs
[indx
].name
, THERMAL_NAME_LENGTH
,
1506 "trip_point_%d_hyst", indx
);
1508 sysfs_attr_init(&tz
->trip_hyst_attrs
[indx
].attr
.attr
);
1509 tz
->trip_hyst_attrs
[indx
].attr
.attr
.name
=
1510 tz
->trip_hyst_attrs
[indx
].name
;
1511 tz
->trip_hyst_attrs
[indx
].attr
.attr
.mode
= S_IRUGO
;
1512 tz
->trip_hyst_attrs
[indx
].attr
.show
= trip_point_hyst_show
;
1513 if (tz
->ops
->set_trip_hyst
) {
1514 tz
->trip_hyst_attrs
[indx
].attr
.attr
.mode
|= S_IWUSR
;
1515 tz
->trip_hyst_attrs
[indx
].attr
.store
=
1516 trip_point_hyst_store
;
1519 device_create_file(&tz
->device
,
1520 &tz
->trip_hyst_attrs
[indx
].attr
);
1525 static void remove_trip_attrs(struct thermal_zone_device
*tz
)
1529 for (indx
= 0; indx
< tz
->trips
; indx
++) {
1530 device_remove_file(&tz
->device
,
1531 &tz
->trip_type_attrs
[indx
].attr
);
1532 device_remove_file(&tz
->device
,
1533 &tz
->trip_temp_attrs
[indx
].attr
);
1534 if (tz
->ops
->get_trip_hyst
)
1535 device_remove_file(&tz
->device
,
1536 &tz
->trip_hyst_attrs
[indx
].attr
);
1538 kfree(tz
->trip_type_attrs
);
1539 kfree(tz
->trip_temp_attrs
);
1540 kfree(tz
->trip_hyst_attrs
);
1544 * thermal_zone_device_register - register a new thermal zone device
1545 * @type: the thermal zone device type
1546 * @trips: the number of trip points the thermal zone support
1547 * @mask: a bit string indicating the writeablility of trip points
1548 * @devdata: private device data
1549 * @ops: standard thermal zone device callbacks
1550 * @tzp: thermal zone platform parameters
1551 * @passive_delay: number of milliseconds to wait between polls when
1552 * performing passive cooling
1553 * @polling_delay: number of milliseconds to wait between polls when checking
1554 * whether trip points have been crossed (0 for interrupt
1557 * thermal_zone_device_unregister() must be called when the device is no
1558 * longer needed. The passive cooling depends on the .get_trend() return value.
1560 struct thermal_zone_device
*thermal_zone_device_register(const char *type
,
1561 int trips
, int mask
, void *devdata
,
1562 const struct thermal_zone_device_ops
*ops
,
1563 const struct thermal_zone_params
*tzp
,
1564 int passive_delay
, int polling_delay
)
1566 struct thermal_zone_device
*tz
;
1567 enum thermal_trip_type trip_type
;
1572 if (type
&& strlen(type
) >= THERMAL_NAME_LENGTH
)
1573 return ERR_PTR(-EINVAL
);
1575 if (trips
> THERMAL_MAX_TRIPS
|| trips
< 0 || mask
>> trips
)
1576 return ERR_PTR(-EINVAL
);
1578 if (!ops
|| !ops
->get_temp
)
1579 return ERR_PTR(-EINVAL
);
1581 if (trips
> 0 && !ops
->get_trip_type
)
1582 return ERR_PTR(-EINVAL
);
1584 tz
= kzalloc(sizeof(struct thermal_zone_device
), GFP_KERNEL
);
1586 return ERR_PTR(-ENOMEM
);
1588 INIT_LIST_HEAD(&tz
->thermal_instances
);
1590 mutex_init(&tz
->lock
);
1591 result
= get_idr(&thermal_tz_idr
, &thermal_idr_lock
, &tz
->id
);
1594 return ERR_PTR(result
);
1597 strcpy(tz
->type
, type
? : "");
1600 tz
->device
.class = &thermal_class
;
1601 tz
->devdata
= devdata
;
1603 tz
->passive_delay
= passive_delay
;
1604 tz
->polling_delay
= polling_delay
;
1606 dev_set_name(&tz
->device
, "thermal_zone%d", tz
->id
);
1607 result
= device_register(&tz
->device
);
1609 release_idr(&thermal_tz_idr
, &thermal_idr_lock
, tz
->id
);
1611 return ERR_PTR(result
);
1616 result
= device_create_file(&tz
->device
, &dev_attr_type
);
1621 result
= device_create_file(&tz
->device
, &dev_attr_temp
);
1625 if (ops
->get_mode
) {
1626 result
= device_create_file(&tz
->device
, &dev_attr_mode
);
1631 result
= create_trip_attrs(tz
, mask
);
1635 for (count
= 0; count
< trips
; count
++) {
1636 tz
->ops
->get_trip_type(tz
, count
, &trip_type
);
1637 if (trip_type
== THERMAL_TRIP_PASSIVE
)
1642 result
= device_create_file(&tz
->device
, &dev_attr_passive
);
1647 #ifdef CONFIG_THERMAL_EMULATION
1648 result
= device_create_file(&tz
->device
, &dev_attr_emul_temp
);
1652 /* Create policy attribute */
1653 result
= device_create_file(&tz
->device
, &dev_attr_policy
);
1657 /* Update 'this' zone's governor information */
1658 mutex_lock(&thermal_governor_lock
);
1661 tz
->governor
= __find_governor(tz
->tzp
->governor_name
);
1663 tz
->governor
= __find_governor(DEFAULT_THERMAL_GOVERNOR
);
1665 mutex_unlock(&thermal_governor_lock
);
1667 result
= thermal_add_hwmon_sysfs(tz
);
1671 mutex_lock(&thermal_list_lock
);
1672 list_add_tail(&tz
->node
, &thermal_tz_list
);
1673 mutex_unlock(&thermal_list_lock
);
1675 /* Bind cooling devices for this zone */
1678 INIT_DELAYED_WORK(&(tz
->poll_queue
), thermal_zone_device_check
);
1680 thermal_zone_device_update(tz
);
1686 release_idr(&thermal_tz_idr
, &thermal_idr_lock
, tz
->id
);
1687 device_unregister(&tz
->device
);
1688 return ERR_PTR(result
);
1690 EXPORT_SYMBOL(thermal_zone_device_register
);
1693 * thermal_device_unregister - removes the registered thermal zone device
1694 * @tz: the thermal zone device to remove
1696 void thermal_zone_device_unregister(struct thermal_zone_device
*tz
)
1699 const struct thermal_zone_params
*tzp
;
1700 struct thermal_cooling_device
*cdev
;
1701 struct thermal_zone_device
*pos
= NULL
;
1708 mutex_lock(&thermal_list_lock
);
1709 list_for_each_entry(pos
, &thermal_tz_list
, node
)
1713 /* thermal zone device not found */
1714 mutex_unlock(&thermal_list_lock
);
1717 list_del(&tz
->node
);
1719 /* Unbind all cdevs associated with 'this' thermal zone */
1720 list_for_each_entry(cdev
, &thermal_cdev_list
, node
) {
1721 if (tz
->ops
->unbind
) {
1722 tz
->ops
->unbind(tz
, cdev
);
1726 if (!tzp
|| !tzp
->tbp
)
1729 for (i
= 0; i
< tzp
->num_tbps
; i
++) {
1730 if (tzp
->tbp
[i
].cdev
== cdev
) {
1731 __unbind(tz
, tzp
->tbp
[i
].trip_mask
, cdev
);
1732 tzp
->tbp
[i
].cdev
= NULL
;
1737 mutex_unlock(&thermal_list_lock
);
1739 thermal_zone_device_set_polling(tz
, 0);
1742 device_remove_file(&tz
->device
, &dev_attr_type
);
1743 device_remove_file(&tz
->device
, &dev_attr_temp
);
1744 if (tz
->ops
->get_mode
)
1745 device_remove_file(&tz
->device
, &dev_attr_mode
);
1746 device_remove_file(&tz
->device
, &dev_attr_policy
);
1747 remove_trip_attrs(tz
);
1748 tz
->governor
= NULL
;
1750 thermal_remove_hwmon_sysfs(tz
);
1751 release_idr(&thermal_tz_idr
, &thermal_idr_lock
, tz
->id
);
1752 idr_destroy(&tz
->idr
);
1753 mutex_destroy(&tz
->lock
);
1754 device_unregister(&tz
->device
);
1757 EXPORT_SYMBOL(thermal_zone_device_unregister
);
1760 static struct genl_family thermal_event_genl_family
= {
1761 .id
= GENL_ID_GENERATE
,
1762 .name
= THERMAL_GENL_FAMILY_NAME
,
1763 .version
= THERMAL_GENL_VERSION
,
1764 .maxattr
= THERMAL_GENL_ATTR_MAX
,
1767 static struct genl_multicast_group thermal_event_mcgrp
= {
1768 .name
= THERMAL_GENL_MCAST_GROUP_NAME
,
1771 int thermal_generate_netlink_event(struct thermal_zone_device
*tz
,
1774 struct sk_buff
*skb
;
1775 struct nlattr
*attr
;
1776 struct thermal_genl_event
*thermal_event
;
1780 static unsigned int thermal_event_seqnum
;
1785 /* allocate memory */
1786 size
= nla_total_size(sizeof(struct thermal_genl_event
)) +
1789 skb
= genlmsg_new(size
, GFP_ATOMIC
);
1793 /* add the genetlink message header */
1794 msg_header
= genlmsg_put(skb
, 0, thermal_event_seqnum
++,
1795 &thermal_event_genl_family
, 0,
1796 THERMAL_GENL_CMD_EVENT
);
1803 attr
= nla_reserve(skb
, THERMAL_GENL_ATTR_EVENT
,
1804 sizeof(struct thermal_genl_event
));
1811 thermal_event
= nla_data(attr
);
1812 if (!thermal_event
) {
1817 memset(thermal_event
, 0, sizeof(struct thermal_genl_event
));
1819 thermal_event
->orig
= tz
->id
;
1820 thermal_event
->event
= event
;
1822 /* send multicast genetlink message */
1823 result
= genlmsg_end(skb
, msg_header
);
1829 result
= genlmsg_multicast(skb
, 0, thermal_event_mcgrp
.id
, GFP_ATOMIC
);
1831 dev_err(&tz
->device
, "Failed to send netlink event:%d", result
);
1835 EXPORT_SYMBOL(thermal_generate_netlink_event
);
1837 static int genetlink_init(void)
1841 result
= genl_register_family(&thermal_event_genl_family
);
1845 result
= genl_register_mc_group(&thermal_event_genl_family
,
1846 &thermal_event_mcgrp
);
1848 genl_unregister_family(&thermal_event_genl_family
);
1852 static void genetlink_exit(void)
1854 genl_unregister_family(&thermal_event_genl_family
);
1856 #else /* !CONFIG_NET */
1857 static inline int genetlink_init(void) { return 0; }
1858 static inline void genetlink_exit(void) {}
1859 #endif /* !CONFIG_NET */
1861 static int __init
thermal_init(void)
1865 result
= class_register(&thermal_class
);
1867 idr_destroy(&thermal_tz_idr
);
1868 idr_destroy(&thermal_cdev_idr
);
1869 mutex_destroy(&thermal_idr_lock
);
1870 mutex_destroy(&thermal_list_lock
);
1873 result
= genetlink_init();
1877 static void __exit
thermal_exit(void)
1879 class_unregister(&thermal_class
);
1880 idr_destroy(&thermal_tz_idr
);
1881 idr_destroy(&thermal_cdev_idr
);
1882 mutex_destroy(&thermal_idr_lock
);
1883 mutex_destroy(&thermal_list_lock
);
1887 fs_initcall(thermal_init
);
1888 module_exit(thermal_exit
);