/*
 *  linux/arch/arm/mach-avalanche/clock.c
 *
 *  Copyright (C) 2004 ARM Limited.
 *  Written by Deep Blue Solutions Limited.
 *
 * 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.
 */

/* Copyright 2008, Texas Instruments Incorporated
 *
 * This program has been modified from its original operation by Texas Instruments
 * to do the following:
 * Explanation of modification.
 *  No change. keeping it for future avalanche SOC use
 *
 * THIS MODIFIED SOFTWARE AND DOCUMENTATION ARE PROVIDED
 * "AS IS," AND TEXAS INSTRUMENTS MAKES NO REPRESENTATIONS
 * OR WARRENTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY
 * PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE OR
 * DOCUMENTATION WILL NOT INFRINGE ANY THIRD PARTY PATENTS,
 * COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
 * See The GNU General Public License for more details.
 *
 * These changes are covered under version 2 of the GNU General Public License,
 * dated June 1991.
*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <linux/semaphore.h>

#include "clock.h"

static LIST_HEAD(clocks);
static DEFINE_MUTEX(clocks_mutex);

struct clk *clk_get(struct device *dev, const char *id)
{
	struct clk *p, *clk = ERR_PTR(-ENOENT);

	mutex_lock(&clocks_mutex);
	list_for_each_entry(p, &clocks, node) {
		if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
			clk = p;
			break;
		}
	}
	mutex_unlock(&clocks_mutex);

	return clk;
}
EXPORT_SYMBOL(clk_get);

void clk_put(struct clk *clk)
{
	module_put(clk->owner);
}
EXPORT_SYMBOL(clk_put);

int clk_enable(struct clk *clk)
{
	return 0;
}
EXPORT_SYMBOL(clk_enable);

void clk_disable(struct clk *clk)
{
}
EXPORT_SYMBOL(clk_disable);

unsigned long clk_get_rate(struct clk *clk)
{
	return clk->rate;
}
EXPORT_SYMBOL(clk_get_rate);

long clk_round_rate(struct clk *clk, unsigned long rate)
{
	return 0; 
}
EXPORT_SYMBOL(clk_round_rate);

int clk_set_rate(struct clk *clk, unsigned long rate)
{
	int ret = -EIO;
	return ret;
}
EXPORT_SYMBOL(clk_set_rate);

int clk_register(struct clk *clk)
{
	mutex_lock(&clocks_mutex);
	list_add(&clk->node, &clocks);
	mutex_unlock(&clocks_mutex);
	return 0;
}
EXPORT_SYMBOL(clk_register);

void clk_unregister(struct clk *clk)
{
	mutex_lock(&clocks_mutex);
	list_del(&clk->node);
	mutex_unlock(&clocks_mutex);
}
EXPORT_SYMBOL(clk_unregister);

static int __init clk_init(void)
{
	return 0;
}

arch_initcall(clk_init);