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Commit f560e322 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Russell King
Browse files

ARM: 8200/1: amba: Add helpers for (un)preparing AMBA clock v12 



Add amba_pclk_prepare() and amba_pclk_unprepare() inline functions for
handling the AMBA bus clock by device drivers.

Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 3fb1581e

include/linux/amba/bus.h

+10 −0
Original line number Diff line number Diff line
@@ -97,6 +97,16 @@ void amba_release_regions(struct amba_device *); 
#define amba_pclk_disable(d)	\

	do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)



static inline int amba_pclk_prepare(struct amba_device *dev)

{

	return clk_prepare(dev->pclk);

}



static inline void amba_pclk_unprepare(struct amba_device *dev)

{

	clk_unprepare(dev->pclk);

}



/* 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)