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/*
* arch/sh/kernel/cpu/sh4a/clock-sh7770.c
*
* SH7770 support for the clock framework
*
* 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 ifc_divisors[] = { 1, 1, 1, 1, 1, 1, 1, 1 };
static int bfc_divisors[] = { 1, 1, 1, 1, 1, 8,12, 1 };
static int pfc_divisors[] = { 1, 8, 1,10,12,16, 1, 1 };
static void master_clk_init(struct clk *clk)
{
clk->rate *= pfc_divisors[(ctrl_inl(FRQCR) >> 28) & 0x000f];
}
static struct clk_ops sh7770_master_clk_ops = {
.init = master_clk_init,
};
static unsigned long module_clk_recalc(struct clk *clk)
{
int idx = ((ctrl_inl(FRQCR) >> 28) & 0x000f);
return clk->parent->rate / pfc_divisors[idx];
}
static struct clk_ops sh7770_module_clk_ops = {
.recalc = module_clk_recalc,
};
static unsigned long bus_clk_recalc(struct clk *clk)
{
int idx = (ctrl_inl(FRQCR) & 0x000f);
return clk->parent->rate / bfc_divisors[idx];
}
static struct clk_ops sh7770_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static unsigned long cpu_clk_recalc(struct clk *clk)
{
int idx = ((ctrl_inl(FRQCR) >> 24) & 0x000f);
return clk->parent->rate / ifc_divisors[idx];
}
static struct clk_ops sh7770_cpu_clk_ops = {
.recalc = cpu_clk_recalc,
};
static struct clk_ops *sh7770_clk_ops[] = {
&sh7770_master_clk_ops,
&sh7770_module_clk_ops,
&sh7770_bus_clk_ops,
&sh7770_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
{
if (idx < ARRAY_SIZE(sh7770_clk_ops))
*ops = sh7770_clk_ops[idx];
}
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