ARM: pxa: add clk_set_rate()

Since there're mulitple clock rates in some device controllers, enable
clk_set_rate() for this usage.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/clock.c b/arch/arm/mach-pxa/clock.c
index d5152220ce94..4d466102a027 100644
--- a/arch/arm/mach-pxa/clock.c
+++ b/arch/arm/mach-pxa/clock.c
@@ -53,6 +53,21 @@ unsigned long clk_get_rate(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_get_rate);
 
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+        unsigned long flags;
+        int ret = -EINVAL;
+
+        if (clk->ops->setrate) {
+                spin_lock_irqsave(&clocks_lock, flags);
+                ret = clk->ops->setrate(clk, rate);
+                spin_unlock_irqrestore(&clocks_lock, flags);
+        }
+
+        return ret;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
 void clk_dummy_enable(struct clk *clk)
 {
 }