// SPDX-License-Identifier: GPL-2.0
/*
* arch / sh / kernel / cpu / sh2a / clock - sh7203 . c
*
* SH7203 support for the clock framework
*
* Copyright ( C ) 2007 Kieran Bingham ( MPC - Data Ltd )
*
* Based on clock - sh7263 . c
* Copyright ( C ) 2006 Yoshinori Sato
*
* Based on clock - sh4 . c
* Copyright ( C ) 2005 Paul Mundt
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <asm /clock.h>
#include <asm /freq.h>
#include <asm /io.h>
static const int pll1rate[]={8 ,12 ,16 ,0 };
static const int pfc_divisors[]={1 ,2 ,3 ,4 ,6 ,8 ,12 };
#define ifc_divisors pfc_divisors
static unsigned int pll2_mult;
static void master_clk_init(struct clk *clk)
{
clk->rate *= pll1rate[(__raw_readw(FREQCR) >> 8 ) & 0 x0003] * pll2_mult;
}
static struct sh_clk_ops sh7203_master_clk_ops = {
.init = master_clk_init,
};
static unsigned long module_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FREQCR) & 0 x0007);
return clk->parent->rate / pfc_divisors[idx];
}
static struct sh_clk_ops sh7203_module_clk_ops = {
.recalc = module_clk_recalc,
};
static unsigned long bus_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FREQCR) & 0 x0007);
return clk->parent->rate / pfc_divisors[idx-2 ];
}
static struct sh_clk_ops sh7203_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static struct sh_clk_ops sh7203_cpu_clk_ops = {
.recalc = followparent_recalc,
};
static struct sh_clk_ops *sh7203_clk_ops[] = {
&sh7203_master_clk_ops,
&sh7203_module_clk_ops,
&sh7203_bus_clk_ops,
&sh7203_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
{
if (test_mode_pin(MODE_PIN1))
pll2_mult = 4 ;
else if (test_mode_pin(MODE_PIN0))
pll2_mult = 2 ;
else
pll2_mult = 1 ;
if (idx < ARRAY_SIZE(sh7203_clk_ops))
*ops = sh7203_clk_ops[idx];
}
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