pm_runtime.c

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/*
 * Runtime PM support code
 *
 *  Copyright (C) 2009-2010 Magnus Damm
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/pm_domain.h>
#include <linux/pm_clock.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/sh_clk.h>
#include <linux/bitmap.h>
#include <linux/slab.h>

#ifdef CONFIG_PM_RUNTIME

static int default_platform_runtime_idle(struct device *dev)
{
    /* suspend synchronously to disable clocks immediately */
    return pm_runtime_suspend(dev);
}

static struct dev_pm_domain default_pm_domain = {
    .ops = {
        .runtime_suspend = pm_clk_suspend,
        .runtime_resume = pm_clk_resume,
        .runtime_idle = default_platform_runtime_idle,
        USE_PLATFORM_PM_SLEEP_OPS
    },
};

#define DEFAULT_PM_DOMAIN_PTR   (&default_pm_domain)

#else

#define DEFAULT_PM_DOMAIN_PTR   NULL

#endif /* CONFIG_PM_RUNTIME */

static struct pm_clk_notifier_block platform_bus_notifier = {
    .pm_domain = DEFAULT_PM_DOMAIN_PTR,
    .con_ids = { NULL, },
};

static int __init sh_pm_runtime_init(void)
{
    pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
    return 0;
}
core_initcall(sh_pm_runtime_init);

static int __init sh_pm_runtime_late_init(void)
{
    pm_genpd_poweroff_unused();
    return 0;
}
late_initcall(sh_pm_runtime_late_init);