LXR linux/include/linux/pm

   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
  14struct pm_clk_notifier_block {
  15        struct notifier_block nb;
  16        struct dev_pm_domain *pm_domain;
  17        char *con_ids[];
  18};
  19
  20struct clk;
  21
  22#ifdef CONFIG_PM
  23extern int pm_clk_runtime_suspend(struct device *dev);
  24extern 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
  33static 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
  39extern void pm_clk_init(struct device *dev);
  40extern int pm_clk_create(struct device *dev);
  41extern void pm_clk_destroy(struct device *dev);
  42extern int pm_clk_add(struct device *dev, const char *con_id);
  43extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
  44extern int of_pm_clk_add_clk(struct device *dev, const char *name);
  45extern int of_pm_clk_add_clks(struct device *dev);
  46extern void pm_clk_remove(struct device *dev, const char *con_id);
  47extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
  48extern int pm_clk_suspend(struct device *dev);
  49extern int pm_clk_resume(struct device *dev);
  50#else
  51static inline bool pm_clk_no_clocks(struct device *dev)
  52{
  53        return true;
  54}
  55static inline void pm_clk_init(struct device *dev)
  56{
  57}
  58static inline int pm_clk_create(struct device *dev)
  59{
  60        return -EINVAL;
  61}
  62static inline void pm_clk_destroy(struct device *dev)
  63{
  64}
  65static inline int pm_clk_add(struct device *dev, const char *con_id)
  66{
  67        return -EINVAL;
  68}
  69
  70static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
  71{
  72        return -EINVAL;
  73}
  74static inline int of_pm_clk_add_clks(struct device *dev)
  75{
  76        return -EINVAL;
  77}
  78static 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
  83static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
  84{
  85}
  86#endif
  87
  88#ifdef CONFIG_HAVE_CLK
  89extern void pm_clk_add_notifier(struct bus_type *bus,
  90                                        struct pm_clk_notifier_block *clknb);
  91#else
  92static 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