[ARM] 3040/1: AAEC-2000 - Preliminary clock interface support

#

# Common support (must be linked before board specific support)

obj-y += core.o

obj-y += core.o clock.o

# Specific board support

obj-$(CONFIG_MACH_AAED2000) += aaed2000.o

/*

 *  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 <asm/semaphore.h>

#include <asm/hardware/clock.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);

int clk_use(struct clk *clk)

{

	return 0;

}

EXPORT_SYMBOL(clk_use);

void clk_unuse(struct clk *clk)

{

}

EXPORT_SYMBOL(clk_unuse);

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);

/*

 *  linux/arch/arm/mach-aaec2000/clock.h

 *

 *  Copyright (C) 2005 Nicolas Bellido Y Ortega

 *

 *  Based on linux/arch/arm/mach-integrator/clock.h

 *

 * 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.

 */

struct module;

struct clk {

	struct list_head	node;

	unsigned long		rate;

	struct module		*owner;

	const char		*name;

	void			*data;

};

int clk_register(struct clk *clk);

void clk_unregister(struct clk *clk);