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| author | Richard Zhao <richard.zhao@linaro.org> | 2011-11-15 14:47:56 +0800 |
|---|---|---|
| committer | Huang Shijie <b32955@freescale.com> | 2012-01-31 15:36:12 +0800 |
| commit | 87035edf4d53224f0ccf4c68d58ebcb6f00abdce (patch) | |
| tree | 32cdd8a36f57f4d46f3d500c7127ccfea67ac25c /include | |
| parent | 685127193c66f7bd4f5e6b39b063ef430ea2de3c (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')
| -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. |