LXR linux/include/linux/pm

   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
  15struct pm_clk_notifier_block {
  16        struct notifier_block nb;
  17        struct dev_pm_domain *pm_domain;
  18        char *con_ids[];
  19};
  20
  21struct clk;
  22
  23#ifdef CONFIG_PM
  24extern int pm_clk_runtime_suspend(struct device *dev);
  25extern 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
  34static 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
  40extern void pm_clk_init(struct device *dev);
  41extern int pm_clk_create(struct device *dev);
  42extern void pm_clk_destroy(struct device *dev);
  43extern int pm_clk_add(struct device *dev, const char *con_id);
  44extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
  45extern int of_pm_clk_add_clk(struct device *dev, const char *name);
  46extern int of_pm_clk_add_clks(struct device *dev);
  47extern void pm_clk_remove(struct device *dev, const char *con_id);
  48extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
  49extern int pm_clk_suspend(struct device *dev);
  50extern int pm_clk_resume(struct device *dev);
  51#else
  52static inline bool pm_clk_no_clocks(struct device *dev)
  53{
  54        return true;
  55}
  56static inline void pm_clk_init(struct device *dev)
  57{
  58}
  59static inline int pm_clk_create(struct device *dev)
  60{
  61        return -EINVAL;
  62}
  63static inline void pm_clk_destroy(struct device *dev)
  64{
  65}
  66static inline int pm_clk_add(struct device *dev, const char *con_id)
  67{
  68        return -EINVAL;
  69}
  70
  71static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
  72{
  73        return -EINVAL;
  74}
  75static inline int of_pm_clk_add_clks(struct device *dev)
  76{
  77        return -EINVAL;
  78}
  79static inline void pm_clk_remove(struct device *dev, const char *con_id)
  80{
  81}
  82#define pm_clk_suspend  NULL
  83#define pm_clk_resume   NULL
  84static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
  85{
  86}
  87#endif
  88
  89#ifdef CONFIG_HAVE_CLK
  90extern void pm_clk_add_notifier(struct bus_type *bus,
  91                                        struct pm_clk_notifier_block *clknb);
  92#else
  93static inline void pm_clk_add_notifier(struct bus_type *bus,
  94                                        struct pm_clk_notifier_block *clknb)
  95{
  96}
  97#endif
  98
  99#endif
 100