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

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>

diff --git a/arch/arm/mach-shmobile/clock.c b/arch/arm/mach-shmobile/clock.c
index e816ca9bd2131949e8847d82ba6028ceb147282c..ad7df629d995413d7e73338e9a984dbf5870c7e8 100644 (file)
--- a/arch/arm/mach-shmobile/clock.c
+++ b/arch/arm/mach-shmobile/clock.c
@@ -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)
 {

diff --git a/arch/arm/mach-shmobile/include/mach/clock.h b/arch/arm/mach-shmobile/include/mach/clock.h
new file mode 100644 (file)
index 0000000..76ac612
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/clock.h
@@ -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