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 void pm_clk_remove(struct device *dev, const char *con_id);
  46extern int pm_clk_suspend(struct device *dev);
  47extern int pm_clk_resume(struct device *dev);
  48#else
  49static inline bool pm_clk_no_clocks(struct device *dev)
  50{
  51        return true;
  52}
  53static inline void pm_clk_init(struct device *dev)
  54{
  55}
  56static inline int pm_clk_create(struct device *dev)
  57{
  58        return -EINVAL;
  59}
  60static inline void pm_clk_destroy(struct device *dev)
  61{
  62}
  63static inline int pm_clk_add(struct device *dev, const char *con_id)
  64{
  65        return -EINVAL;
  66}
  67
  68static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
  69{
  70        return -EINVAL;
  71}
  72static 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
  80extern void pm_clk_add_notifier(struct bus_type *bus,
  81                                        struct pm_clk_notifier_block *clknb);
  82#else
  83static inline void pm_clk_add_notifier(struct bus_type *bus,
  84                                        struct pm_clk_notifier_block *clknb)
  85{
  86}
  87#endif
  88
  89#endif
  90