include/linux/pm_clock.h

   1 /*
   2  * pm_clock.h - Definitions and headers related to device clocks.
   3  *
   4  * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, 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
  24 extern int pm_clk_runtime_suspend(struct device *dev);
  25 extern int pm_clk_runtime_resume(struct device *dev);
  26 #define USE_PM_CLK_RUNTIME_OPS \
  27         .runtime_suspend = pm_clk_runtime_suspend, \
  28         .runtime_resume = pm_clk_runtime_resume,
  29 #else
  30 #define USE_PM_CLK_RUNTIME_OPS
  31 #endif
  32
  33 #ifdef CONFIG_PM_CLK
  34 static inline bool pm_clk_no_clocks(struct device *dev)
  35 {
  36         return dev && dev->power.subsys_data
  37                 && list_empty(&dev->power.subsys_data->clock_list);
  38 }
  39
  40 extern void pm_clk_init(struct device *dev);
  41 extern int pm_clk_create(struct device *dev);
  42 extern void pm_clk_destroy(struct device *dev);
  43 extern int pm_clk_add(struct device *dev, const char *con_id);
  44 extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
  45 extern void pm_clk_remove(struct device *dev, const char *con_id);
  46 extern int pm_clk_suspend(struct device *dev);
  47 extern int pm_clk_resume(struct device *dev);
  48 #else
  49 static inline bool pm_clk_no_clocks(struct device *dev)
  50 {
  51         return true;
  52 }
  53 static inline void pm_clk_init(struct device *dev)
  54 {
  55 }
  56 static inline int pm_clk_create(struct device *dev)
  57 {
  58         return -EINVAL;
  59 }
  60 static inline void pm_clk_destroy(struct device *dev)
  61 {
  62 }
  63 static inline int pm_clk_add(struct device *dev, const char *con_id)
  64 {
  65         return -EINVAL;
  66 }
  67
  68 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
  69 {
  70         return -EINVAL;
  71 }
  72 static inline void pm_clk_remove(struct device *dev, const char *con_id)
  73 {
  74 }
  75 #define pm_clk_suspend  NULL
  76 #define pm_clk_resume   NULL
  77 #endif
  78
  79 #ifdef CONFIG_HAVE_CLK
  80 extern void pm_clk_add_notifier(struct bus_type *bus,
  81                                         struct pm_clk_notifier_block *clknb);
  82 #else
  83 static inline void pm_clk_add_notifier(struct bus_type *bus,
  84                                         struct pm_clk_notifier_block *clknb)
  85 {
  86 }
  87 #endif
  88
  89 #endif