1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/include/linux/clock_cooling.h 4 * 5 * Copyright (C) 2014 Eduardo Valentin <edubezval@gmail.com> 6 * 7 * Copyright (C) 2013 Texas Instruments Inc. 8 * Contact: Eduardo Valentin <eduardo.valentin@ti.com> 9 * 10 * Highly based on cpu_cooling.c. 11 * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com) 12 * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org> 13 */ 14 15 #ifndef __CPU_COOLING_H__ 16 #define __CPU_COOLING_H__ 17 18 #include <linux/of.h> 19 #include <linux/thermal.h> 20 #include <linux/cpumask.h> 21 22 #ifdef CONFIG_CLOCK_THERMAL 23 /** 24 * clock_cooling_register - function to create clock cooling device. 25 * @dev: struct device pointer to the device used as clock cooling device. 26 * @clock_name: string containing the clock used as cooling mechanism. 27 */ 28 struct thermal_cooling_device * 29 clock_cooling_register(struct device *dev, const char *clock_name); 30 31 /** 32 * clock_cooling_unregister - function to remove clock cooling device. 33 * @cdev: thermal cooling device pointer. 34 */ 35 void clock_cooling_unregister(struct thermal_cooling_device *cdev); 36 37 unsigned long clock_cooling_get_level(struct thermal_cooling_device *cdev, 38 unsigned long freq); 39 #else /* !CONFIG_CLOCK_THERMAL */ 40 static inline struct thermal_cooling_device * clock_cooling_register(struct device * dev,const char * clock_name)41clock_cooling_register(struct device *dev, const char *clock_name) 42 { 43 return NULL; 44 } 45 static inline clock_cooling_unregister(struct thermal_cooling_device * cdev)46void clock_cooling_unregister(struct thermal_cooling_device *cdev) 47 { 48 } 49 static inline clock_cooling_get_level(struct thermal_cooling_device * cdev,unsigned long freq)50unsigned long clock_cooling_get_level(struct thermal_cooling_device *cdev, 51 unsigned long freq) 52 { 53 return THERMAL_CSTATE_INVALID; 54 } 55 #endif /* CONFIG_CLOCK_THERMAL */ 56 57 #endif /* __CPU_COOLING_H__ */ 58
