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In order to set the scene for the thresholds support which have to manipulate the low and high temperature boundaries for the interrupt support, we must pass the low and high values to the incoming thresholds routine. The variables are set from the thermal_zone_set_trips() where the function loops the thermal trips to figure out the next and the previous temperatures to set the interrupt to be triggered when they are crossed. These variables will be needed by the function in charge of handling the thresholds in the incoming changes but they are local to the aforementioned function thermal_zone_set_trips(). Move the low and high boundaries computation out of the function in thermal_zone_device_update() so they are accessible from there. The positive side effect is they are computed in the same loop as handle_thermal_trip(), so we remove one loop. Co-developed-by: Rafael J. Wysocki <rjw@rjwysocki.net> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://patch.msgid.link/20240816081241.1925221-2-daniel.lezcano@linaro.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2008 Intel Corp
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* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
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* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
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* Copyright 2022 Linaro Limited
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*
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* Thermal trips handling
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*/
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#include "thermal_core.h"
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static const char *trip_type_names[] = {
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[THERMAL_TRIP_ACTIVE] = "active",
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[THERMAL_TRIP_PASSIVE] = "passive",
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[THERMAL_TRIP_HOT] = "hot",
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[THERMAL_TRIP_CRITICAL] = "critical",
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};
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const char *thermal_trip_type_name(enum thermal_trip_type trip_type)
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{
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if (trip_type < THERMAL_TRIP_ACTIVE || trip_type > THERMAL_TRIP_CRITICAL)
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return "unknown";
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return trip_type_names[trip_type];
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}
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int for_each_thermal_trip(struct thermal_zone_device *tz,
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int (*cb)(struct thermal_trip *, void *),
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void *data)
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{
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struct thermal_trip_desc *td;
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int ret;
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for_each_trip_desc(tz, td) {
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ret = cb(&td->trip, data);
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if (ret)
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(for_each_thermal_trip);
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int thermal_zone_for_each_trip(struct thermal_zone_device *tz,
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int (*cb)(struct thermal_trip *, void *),
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void *data)
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{
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int ret;
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mutex_lock(&tz->lock);
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ret = for_each_thermal_trip(tz, cb, data);
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mutex_unlock(&tz->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(thermal_zone_for_each_trip);
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void thermal_zone_set_trips(struct thermal_zone_device *tz, int low, int high)
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{
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int ret;
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lockdep_assert_held(&tz->lock);
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if (!tz->ops.set_trips)
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return;
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/* No need to change trip points */
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if (tz->prev_low_trip == low && tz->prev_high_trip == high)
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return;
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tz->prev_low_trip = low;
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tz->prev_high_trip = high;
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dev_dbg(&tz->device,
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"new temperature boundaries: %d < x < %d\n", low, high);
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/*
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* Set a temperature window. When this window is left the driver
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* must inform the thermal core via thermal_zone_device_update.
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*/
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ret = tz->ops.set_trips(tz, low, high);
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if (ret)
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dev_err(&tz->device, "Failed to set trips: %d\n", ret);
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}
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int thermal_zone_trip_id(const struct thermal_zone_device *tz,
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const struct thermal_trip *trip)
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{
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/*
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* Assume the trip to be located within the bounds of the thermal
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* zone's trips[] table.
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*/
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return trip_to_trip_desc(trip) - tz->trips;
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}
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void thermal_zone_set_trip_hyst(struct thermal_zone_device *tz,
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struct thermal_trip *trip, int hyst)
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{
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WRITE_ONCE(trip->hysteresis, hyst);
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thermal_notify_tz_trip_change(tz, trip);
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}
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void thermal_zone_set_trip_temp(struct thermal_zone_device *tz,
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struct thermal_trip *trip, int temp)
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{
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if (trip->temperature == temp)
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return;
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WRITE_ONCE(trip->temperature, temp);
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thermal_notify_tz_trip_change(tz, trip);
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if (temp == THERMAL_TEMP_INVALID) {
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struct thermal_trip_desc *td = trip_to_trip_desc(trip);
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if (tz->temperature >= td->threshold) {
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/*
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* The trip has been crossed on the way up, so some
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* adjustments are needed to compensate for the lack
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* of it going forward.
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*/
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if (trip->type == THERMAL_TRIP_PASSIVE) {
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tz->passive--;
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WARN_ON_ONCE(tz->passive < 0);
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}
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thermal_zone_trip_down(tz, trip);
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}
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/*
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* Invalidate the threshold to avoid triggering a spurious
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* trip crossing notification when the trip becomes valid.
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*/
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td->threshold = INT_MAX;
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}
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}
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EXPORT_SYMBOL_GPL(thermal_zone_set_trip_temp);
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