/*
 *  linux/include/linux/clk.h
 *
 *  Copyright (C) 2004 ARM Limited.
 *  Written by Deep Blue Solutions Limited.
 *  Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __LINUX_CLK_H
#define __LINUX_CLK_H

#include <linux/kernel.h>
#include <linux/notifier.h>

struct device;

struct clk;

#ifdef CONFIG_COMMON_CLK

#define PRE_RATE_CHANGE			BIT(0)
#define POST_RATE_CHANGE		BIT(1)
#define ABORT_RATE_CHANGE		BIT(2)

struct clk_notifier {
	struct clk			*clk;
	struct srcu_notifier_head	notifier_head;
	struct list_head		node;
};

struct clk_notifier_data {
	struct clk		*clk;
	unsigned long		old_rate;
	unsigned long		new_rate;
};

int clk_notifier_register(struct clk *clk, struct notifier_block *nb);

int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);

#endif 

struct clk *clk_get(struct device *dev, const char *id);

struct clk *devm_clk_get(struct device *dev, const char *id);

#ifdef CONFIG_HAVE_CLK_PREPARE
int clk_prepare(struct clk *clk);
#else
static inline int clk_prepare(struct clk *clk)
{
	might_sleep();
	return 0;
}
#endif

int clk_enable(struct clk *clk);

void clk_disable(struct clk *clk);


#ifdef CONFIG_HAVE_CLK_PREPARE
void clk_unprepare(struct clk *clk);
#else
static inline void clk_unprepare(struct clk *clk)
{
	might_sleep();
}
#endif

static inline int clk_prepare_enable(struct clk *clk)
{
	int ret;

	ret = clk_prepare(clk);
	if (ret)
		return ret;
	ret = clk_enable(clk);
	if (ret)
		clk_unprepare(clk);

	return ret;
}

static inline void clk_disable_unprepare(struct clk *clk)
{
	clk_disable(clk);
	clk_unprepare(clk);
}

unsigned long clk_get_rate(struct clk *clk);

void clk_put(struct clk *clk);




long clk_round_rate(struct clk *clk, unsigned long rate);
 
int clk_set_rate(struct clk *clk, unsigned long rate);
 
int clk_set_parent(struct clk *clk, struct clk *parent);

struct clk *clk_get_parent(struct clk *clk);

struct clk *clk_get_sys(const char *dev_id, const char *con_id);

int clk_add_alias(const char *alias, const char *alias_dev_name, char *id,
			struct device *dev);

#endif