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 <rjw@sisk.pl>, 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_clk(struct device *dev, const char *name); 45 extern int of_pm_clk_add_clks(struct device *dev); 46 extern void pm_clk_remove(struct device *dev, const char *con_id); 47 extern void pm_clk_remove_clk(struct device *dev, struct clk *clk); 48 extern int pm_clk_suspend(struct device *dev); 49 extern int pm_clk_resume(struct device *dev); 50 #else 51 static inline bool pm_clk_no_clocks(struct device *dev) 52 { 53 return true; 54 } 55 static inline void pm_clk_init(struct device *dev) 56 { 57 } 58 static inline int pm_clk_create(struct device *dev) 59 { 60 return -EINVAL; 61 } 62 static inline void pm_clk_destroy(struct device *dev) 63 { 64 } 65 static inline int pm_clk_add(struct device *dev, const char *con_id) 66 { 67 return -EINVAL; 68 } 69 70 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) 71 { 72 return -EINVAL; 73 } 74 static inline int of_pm_clk_add_clks(struct device *dev) 75 { 76 return -EINVAL; 77 } 78 static inline void pm_clk_remove(struct device *dev, const char *con_id) 79 { 80 } 81 #define pm_clk_suspend NULL 82 #define pm_clk_resume NULL 83 static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk) 84 { 85 } 86 #endif 87 88 #ifdef CONFIG_HAVE_CLK 89 extern void pm_clk_add_notifier(struct bus_type *bus, 90 struct pm_clk_notifier_block *clknb); 91 #else 92 static inline void pm_clk_add_notifier(struct bus_type *bus, 93 struct pm_clk_notifier_block *clknb) 94 { 95 } 96 #endif 97 98 #endif 99