[PATCH 1/4 v3] ESDHC: add PIO mode support

[<r66093@freescale.com>]

From: Jerry Huang <Chang-Ming.Huang@freescale.com>

For some FSL ESDHC controller(e.g. P2020E, Rev1.0), the SDHC can not work on
DMA mode because of the hardware bug, so we set a broken dma flag and use
PIO mode.

Signed-off-by: Gao Guanhua <B22826@freescale.com>
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
CC: Chris Ball <cjb@laptop.org>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
---
changes for v2:
	- change the property to compatible for quirks
changes for v3:
	- add the Acked-by

 drivers/mmc/host/sdhci-pltfm.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index 03970bc..67b9ab0 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -2,7 +2,7 @@
  * sdhci-pltfm.c Support for SDHCI platform devices
  * Copyright (c) 2009 Intel Corporation
  *
- * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc.
  * Copyright (c) 2009 MontaVista Software, Inc.
  *
  * Authors: Xiaobo Xie <X.Xie@freescale.com>
@@ -71,6 +71,9 @@ void sdhci_get_of_property(struct platform_device *pdev)
 		if (sdhci_of_wp_inverted(np))
 			host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
 
+		if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
+			host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
+
 		clk = of_get_property(np, "clock-frequency", &size);
 		if (clk && size == sizeof(*clk) && *clk)
 			pltfm_host->clock = be32_to_cpup(clk);
-- 
1.7.5.4