sh: enable and disable clocks recursively

Recurse and make sure parent clocks get enabled/disabled.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index b7e46d5bba43..717056b3d400 100644
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -117,6 +117,11 @@ int clk_enable(struct clk *clk)
         unsigned long flags;
         int ret;
 
+        if (!clk)
+                return -EINVAL;
+
+        clk_enable(clk->parent);
+
         spin_lock_irqsave(&clock_lock, flags);
         ret = __clk_enable(clk);
         spin_unlock_irqrestore(&clock_lock, flags);
@@ -147,9 +152,14 @@ void clk_disable(struct clk *clk)
 {
         unsigned long flags;
 
+        if (!clk)
+                return -EINVAL;
+
         spin_lock_irqsave(&clock_lock, flags);
         __clk_disable(clk);
         spin_unlock_irqrestore(&clock_lock, flags);
+
+        clk_disable(clk->parent);
 }
 EXPORT_SYMBOL_GPL(clk_disable);