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/*
* arch/sh/kernel/cpu/sh2/clock-sh7619.c
*
* SH7619 support for the clock framework
*
* Copyright (C) 2006 Yoshinori Sato
*
* 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};
static const int pfc_divisors[] = {1,2,0,4};
#if (CONFIG_SH_CLK_MD == 1) || (CONFIG_SH_CLK_MD == 2)
#define PLL2 (4)
#elif (CONFIG_SH_CLK_MD == 5) || (CONFIG_SH_CLK_MD == 6)
#define PLL2 (2)
#else
#error "Illigal Clock Mode!"
#endif
static void master_clk_init(struct clk *clk)
{
clk->rate *= PLL2 * pll1rate[(__raw_readw(FREQCR) >> 8) & 7];
}
static struct clk_ops sh7619_master_clk_ops = {
.init = master_clk_init,
};
static unsigned long module_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FREQCR) & 0x0007);
return clk->parent->rate / pfc_divisors[idx];
}
static struct clk_ops sh7619_module_clk_ops = {
.recalc = module_clk_recalc,
};
static unsigned long bus_clk_recalc(struct clk *clk)
{
return clk->parent->rate / pll1rate[(__raw_readw(FREQCR) >> 8) & 7];
}
static struct clk_ops sh7619_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static struct clk_ops sh7619_cpu_clk_ops = {
.recalc = followparent_recalc,
};
static struct clk_ops *sh7619_clk_ops[] = {
&sh7619_master_clk_ops,
&sh7619_module_clk_ops,
&sh7619_bus_clk_ops,
&sh7619_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
{
if (idx < ARRAY_SIZE(sh7619_clk_ops))
*ops = sh7619_clk_ops[idx];
}
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