[PATCH V3 01/14] clk: add helper functions clk_prepare_enable and clk_disable_unprepare

[Richard Zhao]

Signed-off-by: Richard Zhao <richard.zhao at linaro.org>
---
 include/linux/clk.h |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/include/linux/clk.h b/include/linux/clk.h
index 7213b52..a7dc00d 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -107,6 +107,26 @@ static inline void clk_unprepare(struct clk *clk)
 }
 #endif
 
+static inline int clk_prepare_enable(struct clk *clk)
+{
+	int ret;
+
+	ret = clk_prepare(clk);
+	if (ret)
+		return ret;
+	ret = clk_enable(clk);
+	if (ret)
+		clk_unprepare(clk);
+
+	return ret;
+}
+
+static inline void clk_disable_unprepare(struct clk *clk)
+{
+	clk_disable(clk);
+	clk_unprepare(clk);
+}
+
 /**
  * clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
  *		  This is only valid once the clock source has been enabled.
-- 
1.7.5.4