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Commit 86ad7932 authored by Cliff Cai's avatar Cliff Cai Committed by Bryan Wu
Browse files

Blackfin arch: enable a choice to provide 4M DMA memory 



support two cascaded AD73322 cards, more uncached DMA
memory is needed, so add a choice to provide 4M DMA memory

Signed-off-by: default avatarCliff Cai <cliff.cai@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent c6c6f75d

arch/blackfin/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -685,6 +685,8 @@ choice 
	prompt "Uncached SDRAM region"

	default DMA_UNCACHED_1M

	depends on BFIN_DMA_5XX

config DMA_UNCACHED_4M

	bool "Enable 4M DMA region"

config DMA_UNCACHED_2M

	bool "Enable 2M DMA region"

config DMA_UNCACHED_1M

include/asm-blackfin/bfin-global.h

+3 −1
Original line number Diff line number Diff line
@@ -37,7 +37,9 @@ 
#include <linux/linkage.h>

#include <linux/types.h>



#if defined(CONFIG_DMA_UNCACHED_2M)

#if defined(CONFIG_DMA_UNCACHED_4M)

# define DMA_UNCACHED_REGION (4 * 1024 * 1024)

#elif defined(CONFIG_DMA_UNCACHED_2M)

# define DMA_UNCACHED_REGION (2 * 1024 * 1024)

#elif defined(CONFIG_DMA_UNCACHED_1M)

# define DMA_UNCACHED_REGION (1024 * 1024)