[PATCH v4 2/4] amba: Add helper macros for (un)preparing AMBA clock
From: Krzysztof Kozlowski <hidden>
Date: 2014-09-16 08:52:19
Also in:
lkml
Subsystem:
arm primecell bus support, the rest · Maintainers:
Russell King, Linus Torvalds
Add amba_pclk_prepare() and amba_pclk_unprepare() macros for handling the AMBA bus clock by device drivers. Signed-off-by: Krzysztof Kozlowski <redacted> --- include/linux/amba/bus.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index fdd7e1b61f60..ad52027a9cbf 100644
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h@@ -92,6 +92,12 @@ void amba_release_regions(struct amba_device *); #define amba_pclk_disable(d) \ do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) +#define amba_pclk_prepare(d) \ + (IS_ERR((d)->pclk) ? 0 : clk_prepare((d)->pclk)) + +#define amba_pclk_unprepare(d) \ + do { if (!IS_ERR((d)->pclk)) clk_unprepare((d)->pclk); } while (0) + /* Some drivers don't use the struct amba_device */ #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)
--
1.9.1