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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2013-03-27 00:55:41 -0700
committerSimon Horman <horms+renesas@verge.net.au>2013-04-02 11:02:16 +0900
commitf5942c76217e3f4c2a62a72c9d64997b8765f9e2 (patch)
treef3eaa01107d9b320f5bd15a245f014092e5c181c /arch/arm
parentb3186c68805911599cbacceae23f60debb5e2210 (diff)
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-shmobile/clock.c13
-rw-r--r--arch/arm/mach-shmobile/include/mach/clock.h39
2 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/clock.c b/arch/arm/mach-shmobile/clock.c
index e816ca9bd213..ad7df629d995 100644
--- 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
index 000000000000..76ac61292e48
--- /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