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
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