| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame] | 1 | /* |
| 2 | * user_space.c - A simple user space Thermal events notifier |
| 3 | * |
| 4 | * Copyright (C) 2012 Intel Corp |
| 5 | * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com> |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; version 2 of the License. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | |
| 25 | #include <linux/thermal.h> |
| 26 | #include <linux/slab.h> |
| 27 | |
| 28 | #include "thermal_core.h" |
| 29 | |
| 30 | /** |
| 31 | * notify_user_space - Notifies user space about thermal events |
| 32 | * @tz - thermal_zone_device |
| 33 | * @trip - trip point index |
| 34 | * |
| 35 | * This function notifies the user space through UEvents. |
| 36 | */ |
| 37 | static int notify_user_space(struct thermal_zone_device *tz, int trip) |
| 38 | { |
| 39 | char *thermal_prop[5]; |
| 40 | int i; |
| 41 | |
| 42 | mutex_lock(&tz->lock); |
| 43 | thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type); |
| 44 | thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature); |
| 45 | thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip); |
| 46 | thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event); |
| 47 | thermal_prop[4] = NULL; |
| 48 | kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop); |
| 49 | for (i = 0; i < 4; ++i) |
| 50 | kfree(thermal_prop[i]); |
| 51 | mutex_unlock(&tz->lock); |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static struct thermal_governor thermal_gov_user_space = { |
| 56 | .name = "user_space", |
| 57 | .throttle = notify_user_space, |
| 58 | }; |
| 59 | |
| 60 | int thermal_gov_user_space_register(void) |
| 61 | { |
| 62 | return thermal_register_governor(&thermal_gov_user_space); |
| 63 | } |
| 64 | |
| 65 | void thermal_gov_user_space_unregister(void) |
| 66 | { |
| 67 | thermal_unregister_governor(&thermal_gov_user_space); |
| 68 | } |
| 69 | |