ARM: davinci: add runtime PM support for clock management

obj-$(CONFIG_CPU_FREQ)			+= cpufreq.o

obj-$(CONFIG_CPU_IDLE)			+= cpuidle.o

obj-$(CONFIG_SUSPEND)			+= pm.o sleep.o

obj-$(CONFIG_HAVE_CLK)			+= pm_domain.o

/*

 * Runtime PM support code for DaVinci

 *

 * Author: Kevin Hilman

 *

 * Copyright (C) 2012 Texas Instruments, Inc.

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2. This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */

#include <linux/init.h>

#include <linux/pm_runtime.h>

#include <linux/pm_clock.h>

#include <linux/platform_device.h>

#ifdef CONFIG_PM_RUNTIME

static int davinci_pm_runtime_suspend(struct device *dev)

{

	int ret;

	dev_dbg(dev, "%s\n", __func__);

	ret = pm_generic_runtime_suspend(dev);

	if (ret)

		return ret;

	ret = pm_clk_suspend(dev);

	if (ret) {

		pm_generic_runtime_resume(dev);

		return ret;

	}

	return 0;

}

static int davinci_pm_runtime_resume(struct device *dev)

{

	dev_dbg(dev, "%s\n", __func__);

	pm_clk_resume(dev);

	return pm_generic_runtime_resume(dev);

}

#endif

static struct dev_pm_domain davinci_pm_domain = {

	.ops = {

		SET_RUNTIME_PM_OPS(davinci_pm_runtime_suspend,

				   davinci_pm_runtime_resume, NULL)

		USE_PLATFORM_PM_SLEEP_OPS

	},

};

static struct pm_clk_notifier_block platform_bus_notifier = {

	.pm_domain = &davinci_pm_domain,

};

static int __init davinci_pm_runtime_init(void)

{

	pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);

	return 0;

}

core_initcall(davinci_pm_runtime_init);