ARM: S3C24XX: claim spi channels for hsspi in dma-s3c2443
From: Heiko Stuebner <heiko.stuebner@...> Date: Tue, 21 Feb 2012 15:36:59 +0100
Commit-Message
SoCs starting with the S3C2443 contain SPI controllers compatible with the spi-s3c64xx driver and therefore need separate dma channels for rx and tx. This patch introduces dma channel declarations for these and changes the dma-s3c2443.c accordingly. None of the older SoCs use the spi-dma at all. Most boards bitbang their spi use and the spi-s3c24xx driver also does not use the dma system. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
arch/arm/mach-s3c24xx/dma-s3c2443.c | 16 ++++++++++++---- arch/arm/mach-s3c24xx/include/mach/dma.h | 4 ++++ 2 files changed, 16 insertions(+), 4 deletions(-)
Statistics
- 16 lines added
- 4 lines removed
Changes
--------------------- arch/arm/mach-s3c24xx/dma-s3c2443.c ----------------------
index e227c47..2d94228 100644
@@ -55,12 +55,20 @@ static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
.name = "sdi",
.channels = MAP(S3C2443_DMAREQSEL_SDI),
},
+ [DMACH_SPI0_RX] = {
+ .name = "spi0-rx",
+ .channels = MAP(S3C2443_DMAREQSEL_SPI0RX),
+ },
+ [DMACH_SPI0_TX] = {
+ .name = "spi0-tx",
.channels = MAP(S3C2443_DMAREQSEL_SPI0TX),
},
+ [DMACH_SPI1_RX] = { /* only on S3C2443/S3C2450 */
+ .name = "spi1-rx",
+ .channels = MAP(S3C2443_DMAREQSEL_SPI1RX),
+ },
+ [DMACH_SPI1_TX] = { /* only on S3C2443/S3C2450 */
+ .name = "spi1-tx",
.channels = MAP(S3C2443_DMAREQSEL_SPI1TX),
},
[DMACH_UART0] = {
------------------- arch/arm/mach-s3c24xx/include/mach/dma.h -------------------
index acbdfec..454831b 100644
@@ -47,6 +47,10 @@ enum dma_ch {
DMACH_UART2_SRC2,
DMACH_UART3, /* s3c2443 has extra uart */
DMACH_UART3_SRC2,
+ DMACH_SPI0_TX, /* s3c2443/2416/2450 hsspi0 */
+ DMACH_SPI0_RX, /* s3c2443/2416/2450 hsspi0 */
+ DMACH_SPI1_TX, /* s3c2443/2450 hsspi1 */
+ DMACH_SPI1_RX, /* s3c2443/2450 hsspi1 */
DMACH_MAX, /* the end entry */
};