LXR linux/arch/arm/mach-davinci/pm

   1/*
   2 * Runtime PM support code for DaVinci
   3 *
   4 * Author: Kevin Hilman
   5 *
   6 * Copyright (C) 2012 Texas Instruments, Inc.
   7 *
   8 * This file is licensed under the terms of the GNU General Public
   9 * License version 2. This program is licensed "as is" without any
  10 * warranty of any kind, whether express or implied.
  11 */
  12#include <linux/init.h>
  13#include <linux/pm_runtime.h>
  14#include <linux/pm_clock.h>
  15#include <linux/platform_device.h>
  16
  17#ifdef CONFIG_PM_RUNTIME
  18static int davinci_pm_runtime_suspend(struct device *dev)
  19{
  20        int ret;
  21
  22        dev_dbg(dev, "%s\n", __func__);
  23
  24        ret = pm_generic_runtime_suspend(dev);
  25        if (ret)
  26                return ret;
  27
  28        ret = pm_clk_suspend(dev);
  29        if (ret) {
  30                pm_generic_runtime_resume(dev);
  31                return ret;
  32        }
  33
  34        return 0;
  35}
  36
  37static int davinci_pm_runtime_resume(struct device *dev)
  38{
  39        dev_dbg(dev, "%s\n", __func__);
  40
  41        pm_clk_resume(dev);
  42        return pm_generic_runtime_resume(dev);
  43}
  44#endif
  45
  46static struct dev_pm_domain davinci_pm_domain = {
  47        .ops = {
  48                SET_RUNTIME_PM_OPS(davinci_pm_runtime_suspend,
  49                                   davinci_pm_runtime_resume, NULL)
  50                USE_PLATFORM_PM_SLEEP_OPS
  51        },
  52};
  53
  54static struct pm_clk_notifier_block platform_bus_notifier = {
  55        .pm_domain = &davinci_pm_domain,
  56        .con_ids = { "fck", "master", "slave", NULL },
  57};
  58
  59static int __init davinci_pm_runtime_init(void)
  60{
  61        pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
  62
  63        return 0;
  64}
  65core_initcall(davinci_pm_runtime_init);
  66