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_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