[PATCH 3/6] P2020DS: Fixup sdhc to use PIO mode

[Gao Guanhua]

The SDHC can not work on DMA mode because of the hardware bug,
so we set a broken dma flag and use PIO mode. This patch applies
to Rev1.0.
---
 arch/powerpc/boot/dts/p2020ds.dts |    1 +
 drivers/mmc/host/sdhci-of.c       |    3 +++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/boot/dts/p2020ds.dts b/arch/powerpc/boot/dts/p2020ds.dts
index be449ba..574ad4f 100644
--- a/arch/powerpc/boot/dts/p2020ds.dts
+++ b/arch/powerpc/boot/dts/p2020ds.dts
@@ -459,6 +459,7 @@
 			reg = <0x2e000 0x1000>;
 			interrupts = <72 0x2>;
 			interrupt-parent = <&mpic>;
+			fsl,sdhci-dma-broken;
 			clock-frequency = <0>;
 		};
 
diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c
index 01ab916..5879483 100644
--- a/drivers/mmc/host/sdhci-of.c
+++ b/drivers/mmc/host/sdhci-of.c
@@ -270,6 +270,9 @@ static int __devinit sdhci_of_probe(struct of_device *ofdev,
 	if (sdhci_of_wp_inverted(np))
 		host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
 
+	if (of_get_property(np, "fsl,sdhci-dma-broken", NULL))
+		host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
+
 	clk = of_get_property(np, "clock-frequency", &size);
 	if (clk && size == sizeof(*clk) && *clk)
 		of_host->clock = *clk;
-- 
1.6.4