diff options
| author | Richard Zhao <richard.zhao@linaro.org> | 2011-11-15 14:47:56 +0800 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2011-12-28 21:25:35 +0800 |
| commit | 42c5d52f2bbf68add2d7a6982753993e0c75a119 (patch) | |
| tree | 725714648698dd69e568b198ddd7c753cb38973a /include/linux/clk.h | |
| parent | 384703b8e6cd4c8ef08512e596024e028c91c339 (diff) | |
clk: add helper functions clk_prepare_enable and clk_disable_unprepare
It's for migrating to generic clk framework API.
The helper functions help cases clk_enable/clk_disable is used
in non-atomic context.
For example, Call clk_enable in probe and clk_disable in remove.
Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Diffstat (limited to 'include/linux/clk.h')
| -rw-r--r-- | include/linux/clk.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/clk.h b/include/linux/clk.h index 7213b52b2c0e..b9d46fa154b4 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -107,6 +107,28 @@ static inline void clk_unprepare(struct clk *clk) } #endif +/* clk_prepare_enable helps cases using clk_enable in non-atomic context. */ +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; +} + +/* clk_disable_unprepare helps cases using clk_disable in non-atomic context. */ +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. |