[linux-2.6-block.git] / arch / sh / kernel / cpu / sh3 / clock-sh7712.c

/*
 * 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 unsigned long module_clk_recalc(struct clk *clk)
{
	int frqcr = ctrl_inw(FRQCR);
	int idx = frqcr & 0x0007;

	return clk->parent->rate / divisors[idx];
}

static struct clk_ops sh7712_module_clk_ops = {
	.recalc		= module_clk_recalc,
};

static unsigned long cpu_clk_recalc(struct clk *clk)
{
	int frqcr = ctrl_inw(FRQCR);
	int idx = (frqcr & 0x0030) >> 4;

	return 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];
}
Commit	Line	Data
c3aa92af AM	1	/*
	2	* arch/sh/kernel/cpu/sh3/clock-sh7712.c
	3	*
	4	* SH7712 support for the clock framework
	5	*
	6	* Copyright (C) 2007 Andrew Murray <amurray@mpc-data.co.uk>
	7	*
	8	* Based on arch/sh/kernel/cpu/sh3/clock-sh3.c
	9	* Copyright (C) 2005 Paul Mundt
	10	*
	11	* This file is subject to the terms and conditions of the GNU General Public
	12	* License. See the file "COPYING" in the main directory of this archive
	13	* for more details.
	14	*/
	15	#include <linux/init.h>
	16	#include <linux/kernel.h>
	17	#include <asm/clock.h>
	18	#include <asm/freq.h>
	19	#include <asm/io.h>
	20
	21	static int multipliers[] = { 1, 2, 3 };
	22	static int divisors[] = { 1, 2, 3, 4, 6 };
	23
	24	static void master_clk_init(struct clk *clk)
	25	{
	26	int frqcr = ctrl_inw(FRQCR);
	27	int idx = (frqcr & 0x0300) >> 8;
	28
	29	clk->rate *= multipliers[idx];
	30	}
	31
	32	static struct clk_ops sh7712_master_clk_ops = {
	33	.init = master_clk_init,
	34	};
	35
b68d8201	36	static unsigned long module_clk_recalc(struct clk *clk)
c3aa92af AM	37	{
	38	int frqcr = ctrl_inw(FRQCR);
	39	int idx = frqcr & 0x0007;
	40
b68d8201	41	return clk->parent->rate / divisors[idx];
c3aa92af AM	42	}
	43
	44	static struct clk_ops sh7712_module_clk_ops = {
	45	.recalc = module_clk_recalc,
	46	};
	47
b68d8201	48	static unsigned long cpu_clk_recalc(struct clk *clk)
c3aa92af AM	49	{
	50	int frqcr = ctrl_inw(FRQCR);
	51	int idx = (frqcr & 0x0030) >> 4;
	52
b68d8201	53	return clk->parent->rate / divisors[idx];
c3aa92af AM	54	}
	55
	56	static struct clk_ops sh7712_cpu_clk_ops = {
	57	.recalc = cpu_clk_recalc,
	58	};
	59
	60	static struct clk_ops *sh7712_clk_ops[] = {
	61	&sh7712_master_clk_ops,
	62	&sh7712_module_clk_ops,
	63	&sh7712_cpu_clk_ops,
	64	};
	65
	66	void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
	67	{
	68	if (idx < ARRAY_SIZE(sh7712_clk_ops))
	69	*ops = sh7712_clk_ops[idx];
	70	}
	71