[ARM] 3359/1: S3C24XX - add support for clk_set_rate

Patch from Ben Dooks

Add support for clk_set_rate and clk_round_rate to the
s3c2410 clock implementation

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 15 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c2410/clock.c b/arch/arm/mach-s3c2410/clock.c
index e205a6316b08..95c6d46c3dd6 100644
--- a/arch/arm/mach-s3c2410/clock.c
+++ b/arch/arm/mach-s3c2410/clock.c
@@ -180,12 +180,24 @@ unsigned long clk_get_rate(struct clk *clk)
 
 long clk_round_rate(struct clk *clk, unsigned long rate)
 {
+        if (!IS_ERR(clk) && clk->round_rate)
+                return (clk->round_rate)(clk, rate);
+
         return rate;
 }
 
 int clk_set_rate(struct clk *clk, unsigned long rate)
 {
-        return -EINVAL;
+        int ret;
+
+        if (IS_ERR(clk))
+                return -EINVAL;
+
+        mutex_lock(&clocks_mutex);
+        ret = (clk->set_rate)(clk, rate);
+        mutex_unlock(&clocks_mutex);
+
+        return ret;
 }
 
 struct clk *clk_get_parent(struct clk *clk)
diff --git a/arch/arm/mach-s3c2410/clock.h b/arch/arm/mach-s3c2410/clock.h
index c4f36f006496..32864b30c1e0 100644
--- a/arch/arm/mach-s3c2410/clock.h
+++ b/arch/arm/mach-s3c2410/clock.h
@@ -21,6 +21,8 @@ struct clk {
         unsigned long         ctrlbit;
 
         int                 (*enable)(struct clk *, int enable);
+        int                 (*set_rate)(struct clk *c, unsigned long rate);
+        unsigned long       (*round_rate)(struct clk *c, unsigned long rate);
         int                 (*set_parent)(struct clk *c, struct clk *parent);
 };