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drivers/thermal/user_space.c
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/* * user_space.c - A simple user space Thermal events notifier * * Copyright (C) 2012 Intel Corp * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
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#include <linux/thermal.h> |
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#include <linux/slab.h> |
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#include "thermal_core.h" /** * notify_user_space - Notifies user space about thermal events * @tz - thermal_zone_device |
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* @trip - Trip point index |
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* * This function notifies the user space through UEvents. */ |
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static int notify_user_space(struct thermal_zone_device *tz, int trip) |
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{ |
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char *thermal_prop[5]; int i; |
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mutex_lock(&tz->lock); |
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thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type); thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature); thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip); thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event); thermal_prop[4] = NULL; kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop); for (i = 0; i < 4; ++i) kfree(thermal_prop[i]); |
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mutex_unlock(&tz->lock); return 0; } |
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static struct thermal_governor thermal_gov_user_space = { |
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.name = "user_space", .throttle = notify_user_space, |
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}; |
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int thermal_gov_user_space_register(void) |
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{ return thermal_register_governor(&thermal_gov_user_space); } |
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void thermal_gov_user_space_unregister(void) |
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{ thermal_unregister_governor(&thermal_gov_user_space); } |