[PATCH 2/5] mmc: sdhci-esdhc-imx: add flag ESDHC_FLAG_ENGCM07207

[Shawn Guo]

Add flag ESDHC_FLAG_ENGCM07207 for enabling the workaround for errata
ENGcm07207 and set the flag for i.MX25 and i.MX35 ESDHC.

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
 drivers/mmc/host/sdhci-esdhc-imx.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index e046917..a5d7d15 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -89,6 +89,11 @@
  * exeception. Bit1 of Vendor Spec registor is used to fix it.
  */
 #define ESDHC_FLAG_MULTIBLK_NO_INT	BIT(1)
+/*
+ * The flag enables the workaround for ESDHC errata ENGcm07207 which
+ * presents on i.MX25 and i.MX35.
+ */
+#define ESDHC_FLAG_ENGCM07207		BIT(2)
 
 enum imx_esdhc_type {
 	IMX25_ESDHC,
@@ -865,6 +870,9 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	if (is_imx25_esdhc(imx_data))
 		imx_data->flags |= ESDHC_FLAG_NO_DMAS_BITS;
 
+	if (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data))
+		imx_data->flags |= ESDHC_FLAG_ENGCM07207;
+
 	imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
 	if (IS_ERR(imx_data->clk_ipg)) {
 		err = PTR_ERR(imx_data->clk_ipg);
@@ -905,7 +913,7 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 
 	host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
-	if (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data))
+	if (imx_data->flags & ESDHC_FLAG_ENGCM07207)
 		/* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */
 		host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK
 			| SDHCI_QUIRK_BROKEN_ADMA;
-- 
1.7.9.5