sh: sh7712 clock support

clock-$(CONFIG_CPU_SUBTYPE_SH7709)	:= clock-sh7709.o

clock-$(CONFIG_CPU_SUBTYPE_SH7710)	:= clock-sh7710.o

clock-$(CONFIG_CPU_SUBTYPE_SH7720)	:= clock-sh7710.o

clock-$(CONFIG_CPU_SUBTYPE_SH7712)	:= clock-sh7712.o

obj-y	+= $(clock-y)

/*

 * arch/sh/kernel/cpu/sh3/clock-sh7712.c

 *

 * SH7712 support for the clock framework

 *

 *  Copyright (C) 2007  Andrew Murray <amurray@mpc-data.co.uk>

 *

 * Based on arch/sh/kernel/cpu/sh3/clock-sh3.c

 *  Copyright (C) 2005  Paul Mundt

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 */

#include <linux/init.h>

#include <linux/kernel.h>

#include <asm/clock.h>

#include <asm/freq.h>

#include <asm/io.h>

static int multipliers[] = { 1, 2, 3 };

static int divisors[]    = { 1, 2, 3, 4, 6 };

static void master_clk_init(struct clk *clk)

{

	int frqcr = ctrl_inw(FRQCR);

	int idx = (frqcr & 0x0300) >> 8;

	clk->rate *= multipliers[idx];

}

static struct clk_ops sh7712_master_clk_ops = {

	.init		= master_clk_init,

};

static void module_clk_recalc(struct clk *clk)

{

	int frqcr = ctrl_inw(FRQCR);

	int idx = frqcr & 0x0007;

	clk->rate = clk->parent->rate / divisors[idx];

}

static struct clk_ops sh7712_module_clk_ops = {

	.recalc		= module_clk_recalc,

};

static void cpu_clk_recalc(struct clk *clk)

{

	int frqcr = ctrl_inw(FRQCR);

	int idx = (frqcr & 0x0030) >> 4;

	clk->rate = clk->parent->rate / divisors[idx];

}

static struct clk_ops sh7712_cpu_clk_ops = {

	.recalc		= cpu_clk_recalc,

};

static struct clk_ops *sh7712_clk_ops[] = {

	&sh7712_master_clk_ops,

	&sh7712_module_clk_ops,

	&sh7712_cpu_clk_ops,

};

void __init arch_init_clk_ops(struct clk_ops **ops, int idx)

{

	if (idx < ARRAY_SIZE(sh7712_clk_ops))

		*ops = sh7712_clk_ops[idx];

}

#ifndef __ASM_CPU_SH3_FREQ_H

#define __ASM_CPU_SH3_FREQ_H

#ifdef CONFIG_CPU_SUBTYPE_SH7712

#define FRQCR			0xA415FF80

#else

#define FRQCR			0xffffff80

#endif

#define MIN_DIVISOR_NR		0

#define MAX_DIVISOR_NR		4