Commit | Line | Data |
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873e65bc | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1cc807a2 D |
2 | /* |
3 | * user_space.c - A simple user space Thermal events notifier | |
4 | * | |
5 | * Copyright (C) 2012 Intel Corp | |
6 | * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
1cc807a2 D |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
11 | */ | |
12 | ||
998d924b | 13 | #include <linux/slab.h> |
6abea5d2 | 14 | #include <linux/thermal.h> |
0d76d6e1 | 15 | |
1cc807a2 D |
16 | #include "thermal_core.h" |
17 | ||
0275c9fb DL |
18 | static int user_space_bind(struct thermal_zone_device *tz) |
19 | { | |
fa1ef24a | 20 | pr_info_once("Consider using thermal netlink events interface\n"); |
0275c9fb DL |
21 | |
22 | return 0; | |
23 | } | |
24 | ||
1cc807a2 D |
25 | /** |
26 | * notify_user_space - Notifies user space about thermal events | |
53d256e7 AK |
27 | * @tz: thermal_zone_device |
28 | * @trip: trip point index | |
1cc807a2 D |
29 | * |
30 | * This function notifies the user space through UEvents. | |
31 | */ | |
e15cb144 | 32 | static int notify_user_space(struct thermal_zone_device *tz, int trip) |
1cc807a2 | 33 | { |
998d924b SP |
34 | char *thermal_prop[5]; |
35 | int i; | |
36 | ||
72c976fc RW |
37 | lockdep_assert_held(&tz->lock); |
38 | ||
998d924b SP |
39 | thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type); |
40 | thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature); | |
41 | thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip); | |
42 | thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event); | |
43 | thermal_prop[4] = NULL; | |
44 | kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop); | |
45 | for (i = 0; i < 4; ++i) | |
46 | kfree(thermal_prop[i]); | |
72c976fc | 47 | |
1cc807a2 D |
48 | return 0; |
49 | } | |
50 | ||
e15cb144 | 51 | static struct thermal_governor thermal_gov_user_space = { |
1cc807a2 D |
52 | .name = "user_space", |
53 | .throttle = notify_user_space, | |
0275c9fb | 54 | .bind_to_tz = user_space_bind, |
1cc807a2 | 55 | }; |
57c5b2ec | 56 | THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space); |