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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: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Cliff Cai 2008-05-17 16:36:52 +08:00 committed by Bryan Wu
parent c6c6f75d54
commit 86ad79321c
2 changed files with 5 additions and 1 deletions
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2
arch/blackfin/Kconfig
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@ -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

4
include/asm-blackfin/bfin-global.h
View File

@ -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)