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/*
* arch/sh/kernel/cpu/sh2a/clock-sh7201.c
*
* SH7201 support for the clock framework
*
* Copyright (C) 2008 Peter Griffin <pgriffin@mpc-data.co.uk>
*
* Based on clock-sh4.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 const int pll1rate[]={1,2,3,4,6,8};
static const int pfc_divisors[]={1,2,3,4,6,8,12};
#define ifc_divisors pfc_divisors
#if (CONFIG_SH_CLK_MD == 0)
#define PLL2 (4)
#elif (CONFIG_SH_CLK_MD == 2)
#define PLL2 (2)
#elif (CONFIG_SH_CLK_MD == 3)
#define PLL2 (1)
#else
#error "Illegal Clock Mode!"
#endif
static void master_clk_init(struct clk *clk)
{
clk->rate = 10000000 * PLL2 * pll1rate[(ctrl_inw(FREQCR) >> 8) & 0x0007];
}
static struct clk_ops sh7201_master_clk_ops = {
.init = master_clk_init,
};
static void module_clk_recalc(struct clk *clk)
{
int idx = (ctrl_inw(FREQCR) & 0x0007);
clk->rate = clk->parent->rate / pfc_divisors[idx];
}
static struct clk_ops sh7201_module_clk_ops = {
.recalc = module_clk_recalc,
};
static void bus_clk_recalc(struct clk *clk)
{
int idx = (ctrl_inw(FREQCR) & 0x0007);
clk->rate = clk->parent->rate / pfc_divisors[idx];
}
static struct clk_ops sh7201_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static void cpu_clk_recalc(struct clk *clk)
{
int idx = ((ctrl_inw(FREQCR) >> 4) & 0x0007);
clk->rate = clk->parent->rate / ifc_divisors[idx];
}
static struct clk_ops sh7201_cpu_clk_ops = {
.recalc = cpu_clk_recalc,
};
static struct clk_ops *sh7201_clk_ops[] = {
&sh7201_master_clk_ops,
&sh7201_module_clk_ops,
&sh7201_bus_clk_ops,
&sh7201_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
{
if (idx < ARRAY_SIZE(sh7201_clk_ops))
*ops = sh7201_clk_ops[idx];
}
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