clock.c

/*
 *  linux/arch/arm/mach-aaec2000/clock.c
 *
 *  Copyright (C) 2005 Nicolas Bellido Y Ortega
 *
 *  Based on linux/arch/arm/mach-integrator/clock.c
 *
 * 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.
 */
#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 <asm/semaphore.h>

#include "clock.h"

static LIST_HEAD(clocks);
static DECLARE_MUTEX(clocks_sem);

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

	down(&clocks_sem);
	list_for_each_entry(p, &clocks, node) {
		if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
			clk = p;
			break;
		}
	}
	up(&clocks_sem);

	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 rate;
}
EXPORT_SYMBOL(clk_round_rate);

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

int clk_register(struct clk *clk)
{
	down(&clocks_sem);
	list_add(&clk->node, &clocks);
	up(&clocks_sem);
	return 0;
}
EXPORT_SYMBOL(clk_register);

void clk_unregister(struct clk *clk)
{
	down(&clocks_sem);
	list_del(&clk->node);
	up(&clocks_sem);
}
EXPORT_SYMBOL(clk_unregister);

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