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sh: Fix clock multiplier on SH7722.

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This fixes up the master clock multiplier and initial rate
propagation for the SH7722 clocks.

Signed-off-by: dmitry pervushin <dimka@nomadgs.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
dmitry pervushin 2007-05-15 08:42:22 +09:00 committed by Paul Mundt
parent e113276624
commit dfbbbe9295
2 changed files with 30 additions and 13 deletions
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7
arch/sh/kernel/cpu/clock.c
View File

@ -278,6 +278,11 @@ arch_init_clk_ops(struct clk_ops **ops, int type)
{
}
void __init __attribute__ ((weak))
arch_clk_init(void)
{
}
static int show_clocks(char *buf, char **start, off_t off,
int len, int *eof, void *data)
{
@ -314,6 +319,8 @@ int __init clk_init(void)
ret |= clk_register(clk);
}
arch_clk_init();
/* Kick the child clocks.. */
propagate_rate(&master_clk);
propagate_rate(&bus_clk);

36
arch/sh/kernel/cpu/sh4a/clock-sh7722.c
View File

@ -17,7 +17,6 @@
#include <asm/clock.h>
#include <asm/freq.h>
#define SH7722_PLL_FREQ (32000000/8)
#define N (-1)
#define NM (-2)
#define ROUND_NEAREST 0
@ -141,28 +140,36 @@ static void adjust_clocks(int originate, int *l, unsigned long v[],
*/
static int divisors2[] = { 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40 };
static void master_clk_init(struct clk *clk)
static void master_clk_recalc(struct clk *clk)
{
clk_set_rate(clk, clk_get_rate(clk));
unsigned frqcr = ctrl_inl(FRQCR);
clk->rate = CONFIG_SH_PCLK_FREQ * (((frqcr >> 24) & 0x1f) + 1);
}
static void master_clk_recalc(struct clk *clk)
static void master_clk_init(struct clk *clk)
{
clk->parent = NULL;
clk->flags |= CLK_RATE_PROPAGATES;
clk->rate = CONFIG_SH_PCLK_FREQ;
master_clk_recalc(clk);
}
static void module_clk_recalc(struct clk *clk)
{
unsigned long frqcr = ctrl_inl(FRQCR);
clk->rate = CONFIG_SH_PCLK_FREQ * (1 + (frqcr >> 24 & 0xF));
clk->rate = clk->parent->rate / (((frqcr >> 24) & 0x1f) + 1);
}
static int master_clk_setrate(struct clk *clk, unsigned long rate, int id)
{
int div = rate / SH7722_PLL_FREQ;
int div = rate / clk->rate;
int master_divs[] = { 2, 3, 4, 6, 8, 16 };
int index;
unsigned long frqcr;
if (rate < SH7722_PLL_FREQ * 2)
return -EINVAL;
for (index = 1; index < ARRAY_SIZE(master_divs); index++)
if (div >= master_divs[index - 1] && div < master_divs[index])
break;
@ -185,6 +192,10 @@ static struct clk_ops sh7722_master_clk_ops = {
.set_rate = master_clk_setrate,
};
static struct clk_ops sh7722_module_clk_ops = {
.recalc = module_clk_recalc,
};
struct frqcr_context {
unsigned mask;
unsigned shift;
@ -489,7 +500,7 @@ static void sh7722_siu_recalc(struct clk *clk)
if (siu < 0)
return /* siu */ ;
BUG_ON(siu > 1);
BUG_ON(siu > 2);
r = ctrl_inl(sh7722_siu_regs[siu]);
clk->rate = clk->parent->rate * 2 / divisors2[r & 0xF];
}
@ -571,7 +582,7 @@ static struct clk *sh7722_clocks[] = {
*/
struct clk_ops *onchip_ops[] = {
&sh7722_master_clk_ops,
&sh7722_frqcr_clk_ops,
&sh7722_module_clk_ops,
&sh7722_frqcr_clk_ops,
&sh7722_frqcr_clk_ops,
};
@ -583,7 +594,7 @@ arch_init_clk_ops(struct clk_ops **ops, int type)
*ops = onchip_ops[type];
}
int __init sh7722_clock_init(void)
int __init arch_clk_init(void)
{
struct clk *master;
int i;
@ -597,4 +608,3 @@ int __init sh7722_clock_init(void)
clk_put(master);
return 0;
}
arch_initcall(sh7722_clock_init);