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Eduardo Valentinf9df89d2014-01-06 09:04:18 -04001/*
2 * linux/include/linux/clock_cooling.h
3 *
4 * Copyright (C) 2014 Eduardo Valentin <edubezval@gmail.com>
5 *
6 * Copyright (C) 2013 Texas Instruments Inc.
7 * Contact: Eduardo Valentin <eduardo.valentin@ti.com>
8 *
9 * Highly based on cpu_cooling.c.
10 * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
11 * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; version 2 of the License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 */
22
23#ifndef __CPU_COOLING_H__
24#define __CPU_COOLING_H__
25
26#include <linux/of.h>
27#include <linux/thermal.h>
28#include <linux/cpumask.h>
29
30#ifdef CONFIG_CLOCK_THERMAL
31/**
32 * clock_cooling_register - function to create clock cooling device.
33 * @dev: struct device pointer to the device used as clock cooling device.
34 * @clock_name: string containing the clock used as cooling mechanism.
35 */
36struct thermal_cooling_device *
37clock_cooling_register(struct device *dev, const char *clock_name);
38
39/**
40 * clock_cooling_unregister - function to remove clock cooling device.
41 * @cdev: thermal cooling device pointer.
42 */
43void clock_cooling_unregister(struct thermal_cooling_device *cdev);
44
45unsigned long clock_cooling_get_level(struct thermal_cooling_device *cdev,
46 unsigned long freq);
47#else /* !CONFIG_CLOCK_THERMAL */
48static inline struct thermal_cooling_device *
49clock_cooling_register(struct device *dev, const char *clock_name)
50{
51 return NULL;
52}
53static inline
54void clock_cooling_unregister(struct thermal_cooling_device *cdev)
55{
56}
57static inline
58unsigned long clock_cooling_get_level(struct thermal_cooling_device *cdev,
59 unsigned long freq)
60{
61 return THERMAL_CSTATE_INVALID;
62}
63#endif /* CONFIG_CLOCK_THERMAL */
64
65#endif /* __CPU_COOLING_H__ */