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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.
*/
/* Temperature sensor module for Chrome EC */
#ifndef __CROS_EC_TEMP_SENSOR_H
#define __CROS_EC_TEMP_SENSOR_H
#include "common.h"
/* "enum temp_sensor_id" must be defined for each board in board.h. */
enum temp_sensor_id;
/* Type of temperature sensors. */
enum temp_sensor_type {
/* Ignore this temperature sensor. */
TEMP_SENSOR_TYPE_IGNORED = -1,
/* CPU temperature sensors. */
TEMP_SENSOR_TYPE_CPU = 0,
/* Other on-board temperature sensors. */
TEMP_SENSOR_TYPE_BOARD,
/* Case temperature sensors. */
TEMP_SENSOR_TYPE_CASE,
/* Battery temperature sensors. */
TEMP_SENSOR_TYPE_BATTERY,
TEMP_SENSOR_TYPE_COUNT
};
struct temp_sensor_t {
const char *name;
/* Temperature sensor type. */
enum temp_sensor_type type;
/* Read sensor value in K into temp_ptr; return non-zero if error. */
int (*read)(int idx, int *temp_ptr);
/* Index among the same kind of sensors. */
int idx;
/* Delay between reading temperature and taking action about it,
* in seconds. */
int action_delay_sec;
};
#ifdef CONFIG_TEMP_SENSOR
/*
* Defined in board_temp_sensor.c. Must be in the same order as
* in enum temp_sensor_id.
*/
extern const struct temp_sensor_t temp_sensors[];
#endif
/**
* Get the most recently measured temperature (in degrees K) for the sensor.
*
* @param id Sensor ID
* @param temp_ptr Destination for temperature
*
* @return EC_SUCCESS, or non-zero if error.
*/
int temp_sensor_read(enum temp_sensor_id id, int *temp_ptr);
#endif /* __CROS_EC_TEMP_SENSOR_H */
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