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/*
* Thermal Framework Driver
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* Author: Dan Murphy <DMurphy@ti.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __LINUX_THERMAL_FRAMEWORK_H__
#define __LINUX_THERMAL_FRAMEWORK_H__
struct thermal_dev;
/**
* struct thermal_dev_ops - Structure for device operation call backs
* @get_temp: A temp sensor call back to get the current temperature.
* temp is reported in milli degrees.
* @set_temp_thresh: Update the temperature sensor thresholds. This can be used
* to allow the sensor to only report changes when the thresholds
* have been crossed.
* @set_temp_report_rate: Update the rate at which the temperature sensor
* reports the temperature change. This API should return the
* current measurement rate that the sensor is measuring at.
* @cool_device: The cooling agent call back to process a list of cooling agents
* @process_temp: The governors call back for processing a domain temperature
*
*/
struct thermal_dev_ops {
/* Sensor call backs */
int (*report_temp) (struct thermal_dev *);
int (*set_temp_thresh) (struct thermal_dev *temp_sensor,
int min, int max);
int (*set_temp_report_rate) (struct thermal_dev *, int rate);
/* Cooling agent call backs */
int (*cool_device) (struct thermal_dev *, int temp);
/* Governor call backs */
int (*process_temp) (struct list_head *cooling_list,
struct thermal_dev *temp_sensor, int temp);
};
/**
* struct thermal_dev - Structure for each thermal device.
* @name: The name of the device that is registering to the framework
* @domain_name: The temperature domain that the thermal device represents
* @dev: Device node
* @dev_ops: The device specific operations for the sensor, governor and cooling
* agents.
* @node: The list node of the
* @index: The index of the device created.
* @current_temp: The current temperature reported for the specific domain
*
*/
struct thermal_dev {
const char *name;
const char *domain_name;
struct device *dev;
struct thermal_dev_ops *dev_ops;
struct list_head node;
int index;
int current_temp;
};
extern int thermal_update_temp_thresholds(struct thermal_dev *temp_sensor,
int min, int max);
extern int thermal_request_temp(struct thermal_dev *tdev);
extern int thermal_sensor_set_temp(struct thermal_dev *tdev);
extern int thermal_update_temp_rate(struct thermal_dev *temp_sensor, int rate);
extern int thermal_cooling_set_level(struct list_head *cooling_list,
unsigned int level);
/* Registration and unregistration calls for the thermal devices */
extern int thermal_sensor_dev_register(struct thermal_dev *tdev);
extern void thermal_sensor_dev_unregister(struct thermal_dev *tdev);
extern int thermal_cooling_dev_register(struct thermal_dev *tdev);
extern void thermal_cooling_dev_unregister(struct thermal_dev *tdev);
extern int thermal_governor_dev_register(struct thermal_dev *tdev);
extern void thermal_governor_dev_unregister(struct thermal_dev *tdev);
#endif /* __LINUX_THERMAL_FRAMEWORK_H__ */
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