1 /* 2 * pm_clock.h - Definitions and headers related to device clocks. 3 * 4 * Copyright (C) 2011 Rafael J. Wysocki <[email protected]>, Renesas Electronics Corp. 5 * 6 * This file is released under the GPLv2. 7 */ 8 9 #ifndef _LINUX_PM_CLOCK_H 10 #define _LINUX_PM_CLOCK_H 11 12 #include <linux/device.h> 13 #include <linux/notifier.h> 14 15 struct pm_clk_notifier_block { 16 struct notifier_block nb; 17 struct dev_pm_domain *pm_domain; 18 char *con_ids[]; 19 }; 20 21 struct clk; 22 23 #ifdef CONFIG_PM_CLK 24 static inline bool pm_clk_no_clocks(struct device *dev) 25 { 26 return dev && dev->power.subsys_data 27 && list_empty(&dev->power.subsys_data->clock_list); 28 } 29 30 extern void pm_clk_init(struct device *dev); 31 extern int pm_clk_create(struct device *dev); 32 extern void pm_clk_destroy(struct device *dev); 33 extern int pm_clk_add(struct device *dev, const char *con_id); 34 extern int pm_clk_add_clk(struct device *dev, struct clk *clk); 35 extern void pm_clk_remove(struct device *dev, const char *con_id); 36 extern int pm_clk_suspend(struct device *dev); 37 extern int pm_clk_resume(struct device *dev); 38 #else 39 static inline bool pm_clk_no_clocks(struct device *dev) 40 { 41 return true; 42 } 43 static inline void pm_clk_init(struct device *dev) 44 { 45 } 46 static inline int pm_clk_create(struct device *dev) 47 { 48 return -EINVAL; 49 } 50 static inline void pm_clk_destroy(struct device *dev) 51 { 52 } 53 static inline int pm_clk_add(struct device *dev, const char *con_id) 54 { 55 return -EINVAL; 56 } 57 58 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) 59 { 60 return -EINVAL; 61 } 62 static inline void pm_clk_remove(struct device *dev, const char *con_id) 63 { 64 } 65 #define pm_clk_suspend NULL 66 #define pm_clk_resume NULL 67 #endif 68 69 #ifdef CONFIG_HAVE_CLK 70 extern void pm_clk_add_notifier(struct bus_type *bus, 71 struct pm_clk_notifier_block *clknb); 72 #else 73 static inline void pm_clk_add_notifier(struct bus_type *bus, 74 struct pm_clk_notifier_block *clknb) 75 { 76 } 77 #endif 78 79 #endif 80