[ARM] 3331/1: S3C24XX - add clk_set_parent() to clock code

Patch from Ben Dooks

Add clk_set_parent() call to clock code

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

2 files changed, 20 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/clock.c b/arch/arm/mach-s3c2410/clock.c
index aaada9e3d67f..773b7aec3e99 100644
--- a/arch/arm/mach-s3c2410/clock.c
+++ b/arch/arm/mach-s3c2410/clock.c
@@ -192,6 +192,23 @@ struct clk *clk_get_parent(struct clk *clk)
 	return clk->parent;
 }
 
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+	int ret = 0;
+
+	if (IS_ERR(clk))
+		return -EINVAL;
+
+	mutex_lock(&clocks_mutex);
+
+	if (clk->set_parent)
+		ret = (clk->set_parent)(clk, parent);
+
+	mutex_unlock(&clocks_mutex);
+
+	return ret;
+}
+
 EXPORT_SYMBOL(clk_get);
 EXPORT_SYMBOL(clk_put);
 EXPORT_SYMBOL(clk_enable);
@@ -200,6 +217,7 @@ EXPORT_SYMBOL(clk_get_rate);
 EXPORT_SYMBOL(clk_round_rate);
 EXPORT_SYMBOL(clk_set_rate);
 EXPORT_SYMBOL(clk_get_parent);
+EXPORT_SYMBOL(clk_set_parent);
 
 /* base clock enable */
 
diff --git a/arch/arm/mach-s3c2410/clock.h b/arch/arm/mach-s3c2410/clock.h
index eb5c95d1e7f2..c4f36f006496 100644
--- a/arch/arm/mach-s3c2410/clock.h
+++ b/arch/arm/mach-s3c2410/clock.h
@@ -19,7 +19,9 @@ struct clk {
 	int		      usage;
 	unsigned long         rate;
 	unsigned long         ctrlbit;
+
 	int		    (*enable)(struct clk *, int enable);
+	int		    (*set_parent)(struct clk *c, struct clk *parent);
 };
 
 /* other clocks which may be registered by board support */