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authorAnatolij Gustschin <agust@denx.de>2013-04-08 23:28:09 +0200
committerChris Ball <cjb@laptop.org>2013-04-12 15:13:41 -0400
commite48fc15aa205f380b2fc6d565724a55b1efd8083 (patch)
treeea229dfbfaeeabe15f606734959eeb76f3f34c18 /arch/powerpc/boot
parent42477053c389900f28e200c198830c838989809f (diff)
downloadlinaro-lsk-e48fc15aa205f380b2fc6d565724a55b1efd8083.tar.gz
mmc: mxcmmc: enable DMA support on mpc512x
Add SDHC DMA channel description to the mpc512x device tree to enable slave channel requesting in the mxcmmc driver. mpc512x DMA engine doesn't support endianness conversion when reading/writing data from peripheral's FIFO, so we have to swap data buffers before each DMA write and after each DMA read transfer manually. Since chained SDHC DMA transfers are not supported on mpc512x, limit 'max_segs' tunable parameter to one and initialise it to 64 only when running on i.MX platforms. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'arch/powerpc/boot')
-rw-r--r--arch/powerpc/boot/dts/mpc5121.dtsi2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/boot/dts/mpc5121.dtsi b/arch/powerpc/boot/dts/mpc5121.dtsi
index 723e292b6b4..710aae6ecb4 100644
--- a/arch/powerpc/boot/dts/mpc5121.dtsi
+++ b/arch/powerpc/boot/dts/mpc5121.dtsi
@@ -152,6 +152,8 @@
compatible = "fsl,mpc5121-sdhc";
reg = <0x1500 0x100>;
interrupts = <8 0x8>;
+ dmas = <&dma0 30>;
+ dma-names = "rx-tx";
};
i2c@1700 {