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ARM: shmobile: add struct clk_ratio and fixed ratio clock macro

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Renesas chip has many clocks inside,
and some of them are using fixed ratio via parent clock.
Current shmobile clock code is using own divX_recalc function
and divX_clk_ops.
This patch can reduce these code

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Kuninori Morimoto 2013-03-27 00:55:41 -07:00 committed by Simon Horman
parent b3186c6880
commit f5942c7621
2 changed files with 52 additions and 0 deletions
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13
arch/arm/mach-shmobile/clock.c
View file

@ -23,6 +23,19 @@
#include <linux/init.h>
#include <linux/sh_clk.h>
#include <linux/export.h>
#include <mach/clock.h>
#include <mach/common.h>
unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk)
{
struct clk_ratio *p = clk->priv;
return clk->parent->rate / p->div * p->mul;
};
struct sh_clk_ops shmobile_fixed_ratio_clk_ops = {
.recalc = shmobile_fixed_ratio_clk_recalc,
};
int __init shmobile_clk_init(void)
{

39
arch/arm/mach-shmobile/include/mach/clock.h Normal file
View file

@ -0,0 +1,39 @@
#ifndef CLOCK_H
#define CLOCK_H
unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk);
extern struct sh_clk_ops shmobile_fixed_ratio_clk_ops;
/* clock ratio */
struct clk_ratio {
int mul;
int div;
};
#define SH_CLK_RATIO(name, m, d) \
static struct clk_ratio name ##_ratio = { \
.mul = m, \
.div = d, \
}
#define SH_FIXED_RATIO_CLKg(name, p, r) \
struct clk name = { \
.parent = &p, \
.ops = &shmobile_fixed_ratio_clk_ops,\
.priv = &r ## _ratio, \
}
#define SH_FIXED_RATIO_CLK(name, p, r) \
static SH_FIXED_RATIO_CLKg(name, p, r);
#define SH_FIXED_RATIO_CLK_SET(name, p, m, d) \
SH_CLK_RATIO(name, m, d); \
SH_FIXED_RATIO_CLK(name, p, name);
#define SH_CLK_SET_RATIO(p, m, d) \
{ \
(p)->mul = m; \
(p)->div = d; \
}
#endif