c1beda1cfc
Notifying user space about trip points that have not been crossed is not particularly useful, so modify the User Space governor to use the .trip_crossed() callback, which is only invoked for trips that have been crossed, instead of .throttle() that is invoked for all trips in a thermal zone every time the zone is updated. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* user_space.c - A simple user space Thermal events notifier
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*
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* Copyright (C) 2012 Intel Corp
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* Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include "thermal_core.h"
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static int user_space_bind(struct thermal_zone_device *tz)
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{
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pr_info_once("Consider using thermal netlink events interface\n");
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return 0;
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}
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/**
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* notify_user_space - Notifies user space about thermal events
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* @tz: thermal_zone_device
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* @trip: trip point
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* @crossed_up: whether or not the trip has been crossed on the way up
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*
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* This function notifies the user space through UEvents.
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*/
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static void notify_user_space(struct thermal_zone_device *tz,
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const struct thermal_trip *trip,
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bool crossed_up)
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{
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char *thermal_prop[5];
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int i;
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lockdep_assert_held(&tz->lock);
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thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
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thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
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thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d",
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thermal_zone_trip_id(tz, trip));
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thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
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thermal_prop[4] = NULL;
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kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
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for (i = 0; i < 4; ++i)
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kfree(thermal_prop[i]);
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}
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static struct thermal_governor thermal_gov_user_space = {
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.name = "user_space",
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.trip_crossed = notify_user_space,
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.bind_to_tz = user_space_bind,
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};
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THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);
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