1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * pm_clock.h - Definitions and headers related to device clocks. 4 * 5 * Copyright (C) 2011 Rafael J. Wysocki <[email protected]>, Renesas Electronics Corp. 6 */ 7 8 #ifndef _LINUX_PM_CLOCK_H 9 #define _LINUX_PM_CLOCK_H 10 11 #include <linux/device.h> 12 #include <linux/notifier.h> 13 14 struct pm_clk_notifier_block { 15 struct notifier_block nb; 16 struct dev_pm_domain *pm_domain; 17 char *con_ids[]; 18 }; 19 20 struct clk; 21 22 #ifdef CONFIG_PM 23 extern int pm_clk_runtime_suspend(struct device *dev); 24 extern int pm_clk_runtime_resume(struct device *dev); 25 #define USE_PM_CLK_RUNTIME_OPS \ 26 .runtime_suspend = pm_clk_runtime_suspend, \ 27 .runtime_resume = pm_clk_runtime_resume, 28 #else 29 #define USE_PM_CLK_RUNTIME_OPS 30 #endif 31 32 #ifdef CONFIG_PM_CLK 33 static inline bool pm_clk_no_clocks(struct device *dev) 34 { 35 return dev && dev->power.subsys_data 36 && list_empty(&dev->power.subsys_data->clock_list); 37 } 38 39 extern void pm_clk_init(struct device *dev); 40 extern int pm_clk_create(struct device *dev); 41 extern void pm_clk_destroy(struct device *dev); 42 extern int pm_clk_add(struct device *dev, const char *con_id); 43 extern int pm_clk_add_clk(struct device *dev, struct clk *clk); 44 extern int of_pm_clk_add_clks(struct device *dev); 45 extern void pm_clk_remove_clk(struct device *dev, struct clk *clk); 46 extern int pm_clk_suspend(struct device *dev); 47 extern int pm_clk_resume(struct device *dev); 48 extern int devm_pm_clk_create(struct device *dev); 49 #else 50 static inline bool pm_clk_no_clocks(struct device *dev) 51 { 52 return true; 53 } 54 static inline void pm_clk_init(struct device *dev) 55 { 56 } 57 static inline int pm_clk_create(struct device *dev) 58 { 59 return -EINVAL; 60 } 61 static inline void pm_clk_destroy(struct device *dev) 62 { 63 } 64 static inline int pm_clk_add(struct device *dev, const char *con_id) 65 { 66 return -EINVAL; 67 } 68 69 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) 70 { 71 return -EINVAL; 72 } 73 static inline int of_pm_clk_add_clks(struct device *dev) 74 { 75 return -EINVAL; 76 } 77 #define pm_clk_suspend NULL 78 #define pm_clk_resume NULL 79 static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk) 80 { 81 } 82 static inline int devm_pm_clk_create(struct device *dev) 83 { 84 return -EINVAL; 85 } 86 #endif 87 88 #ifdef CONFIG_HAVE_CLK 89 extern void pm_clk_add_notifier(const struct bus_type *bus, 90 struct pm_clk_notifier_block *clknb); 91 #else 92 static inline void pm_clk_add_notifier(const struct bus_type *bus, 93 struct pm_clk_notifier_block *clknb) 94 { 95 } 96 #endif 97 98 #endif 99