From e3d8024891dbfec6cf36c9b76177650f48118462 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 22 Sep 2009 16:48:56 +0100 Subject: ARM: S3C: Add info for supporting circular DMA buffers The S3C64XX DMA implementation will work a lot better with the ability to enqueue circular buffers as the hardware can do it's own linked-list management. Add a function s3c_dma_has_circular() to show that the system can do this and a flag for the channel. Update the s3c24xx/s3c64xx I2S DMA code to deal with this. Signed-off-by: Ben Dooks Signed-off-by: Ben Dooks Acked-by: Mark Brown --- arch/arm/mach-s3c6400/include/mach/dma.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/arm/mach-s3c6400') diff --git a/arch/arm/mach-s3c6400/include/mach/dma.h b/arch/arm/mach-s3c6400/include/mach/dma.h index 1067619f0ba0..004edab23954 100644 --- a/arch/arm/mach-s3c6400/include/mach/dma.h +++ b/arch/arm/mach-s3c6400/include/mach/dma.h @@ -68,6 +68,11 @@ static __inline__ int s3c_dma_has_circular(void) #define S3C2410_DMAF_CIRCULAR (1 << 0) +static inline bool s3c_dma_has_circular(void) +{ + return false; +} + #include #endif /* __ASM_ARCH_IRQ_H */ -- cgit v1.2.3