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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Thermal engine module for Chrome EC */
#ifndef __CROS_EC_THERMAL_H
#define __CROS_EC_THERMAL_H
#include "temp_sensor.h"
#define THERMAL_CONFIG_NO_FLAG 0x0
#define THERMAL_CONFIG_WARNING_ON_FAIL 0x1
/*
* Number of steps for fan speed control. Speed of each step is defined
* in thermal.c.
*/
#define THERMAL_FAN_STEPS 5
/* Set a threshold temperature to this value to disable the threshold limit. */
#define THERMAL_THRESHOLD_DISABLE 0
/* This macro is used to disable all threshold for a sensor. The value 0
* expands to all field in the array 'thresholds'. Change this if
* THERMAL_THRESHOLD_DISABLE is no longer 0.
*/
#define THERMAL_THRESHOLD_DISABLE_ALL 0
enum thermal_threshold {
THRESHOLD_WARNING = 0, /* Issue overheating warning */
THRESHOLD_CPU_DOWN, /* Shut down CPU */
THRESHOLD_POWER_DOWN, /* Shut down everything we can */
THRESHOLD_COUNT
};
/* Configuration for temperature sensor */
struct thermal_config_t {
/* Configuration flags */
int8_t config_flags;
/* Threshold temperatures in K */
int16_t thresholds[THRESHOLD_COUNT + THERMAL_FAN_STEPS];
};
/**
* Set a threshold temperature.
*
* @param type Sensor type to set threshold for
* @param threshold_id Threshold ID to set
* @param value New threshold temperature in K, or
* THERMAL_THRESHOLD_DISABLE to disable this threshold.
*
* @return EC_SUCCESS if success, non-zero if error.
*/
int thermal_set_threshold(enum temp_sensor_type type, int threshold_id,
int value);
/**
* Read a threshold temperature.
*
* @param type Sensor type to get threshold for
* @param threshold_id Threshold ID
*
* @return The threshold temperature in K, THERMAL_THRESHOLD_DISABLE if
* disabled, -1 if error.
*/
int thermal_get_threshold(enum temp_sensor_type type, int threshold_id);
/**
* Enable/disable automatic fan speed control
*
* @param enable Enable (!=0) or disable (0) auto fan control
*/
void thermal_control_fan(int enable);
#endif /* __CROS_EC_THERMAL_H */
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