8a12149c26
Add a snapshot of thermal core framework changes from msm-4.14.
This is snapshot as of 'commit <0a56f56a528f> ("drivers: thermal:
virtual-sensor: Add new virtual sensors for SDMMAGPIE")'.
Change-Id: Ib0c7a15fadc095fe97c1d7efb4ea7527384c2782
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
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*/
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#include <linux/thermal.h>
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#include <trace/events/thermal.h>
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#include "thermal_core.h"
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static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
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{
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int trip_temp, trip_hyst;
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enum thermal_trip_type trip_type;
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struct thermal_instance *instance;
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bool throttle;
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int old_target;
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tz->ops->get_trip_temp(tz, trip, &trip_temp);
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tz->ops->get_trip_type(tz, trip, &trip_type);
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if (tz->ops->get_trip_hyst) {
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tz->ops->get_trip_hyst(tz, trip, &trip_hyst);
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trip_hyst = trip_temp + trip_hyst;
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} else {
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trip_hyst = trip_temp;
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}
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mutex_lock(&tz->lock);
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list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
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if (instance->trip != trip)
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continue;
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if ((tz->temperature <= trip_temp) ||
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(instance->target != THERMAL_NO_TARGET
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&& tz->temperature < trip_hyst))
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throttle = true;
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else
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throttle = false;
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dev_dbg(&tz->device,
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"Trip%d[type=%d,temp=%d,hyst=%d],throttle=%d\n",
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trip, trip_type, trip_temp, trip_hyst, throttle);
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old_target = instance->target;
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instance->target = (throttle) ? instance->upper
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: THERMAL_NO_TARGET;
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dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n",
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old_target, (int)instance->target);
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if (instance->initialized && old_target == instance->target)
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continue;
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if (!instance->initialized) {
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if (instance->target != THERMAL_NO_TARGET) {
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trace_thermal_zone_trip(tz, trip, trip_type,
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true);
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tz->passive += 1;
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}
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} else {
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if (old_target == THERMAL_NO_TARGET &&
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instance->target != THERMAL_NO_TARGET) {
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trace_thermal_zone_trip(tz, trip, trip_type,
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true);
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tz->passive += 1;
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} else if (old_target != THERMAL_NO_TARGET &&
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instance->target == THERMAL_NO_TARGET) {
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trace_thermal_zone_trip(tz, trip, trip_type,
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false);
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tz->passive -= 1;
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}
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}
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instance->initialized = true;
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instance->cdev->updated = false; /* cdev needs update */
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}
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mutex_unlock(&tz->lock);
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}
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/**
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* low_limits_throttle - throttles devices associated with the given zone
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* @tz - thermal_zone_device
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* @trip - the trip point
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*
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* Throttling Logic: If the sensor reading goes below a trip point, the
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* pre-defined mitigation will be applied for the cooling device.
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* If the sensor reading goes above the trip hysteresis, the
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* mitigation will be removed.
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*/
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static int low_limits_throttle(struct thermal_zone_device *tz, int trip)
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{
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struct thermal_instance *instance;
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thermal_zone_trip_update(tz, trip);
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mutex_lock(&tz->lock);
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list_for_each_entry(instance, &tz->thermal_instances, tz_node)
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thermal_cdev_update(instance->cdev);
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mutex_unlock(&tz->lock);
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return 0;
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}
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static struct thermal_governor thermal_gov_low_limits_floor = {
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.name = "low_limits_floor",
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.throttle = low_limits_throttle,
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.min_state_throttle = 1,
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};
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static struct thermal_governor thermal_gov_low_limits_cap = {
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.name = "low_limits_cap",
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.throttle = low_limits_throttle,
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};
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int thermal_gov_low_limits_register(void)
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{
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thermal_register_governor(&thermal_gov_low_limits_cap);
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return thermal_register_governor(&thermal_gov_low_limits_floor);
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}
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void thermal_gov_low_limits_unregister(void)
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{
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thermal_unregister_governor(&thermal_gov_low_limits_cap);
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thermal_unregister_governor(&thermal_gov_low_limits_floor);
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}
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