Patch to not set reserved bits in i.MX25 PROCTL register. DMA stops working if those bits get set.
Signed-off-by: Wilson Callan <wilson.callan at savantsystems.com>
Acked-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
--- linux-3.4.4/drivers/mmc/host/sdhci-esdhc-imx.c.orig 2012-07-04 13:58:16.239979741 -0400
+++ linux-3.4.4/drivers/mmc/host/sdhci-esdhc-imx.c 2012-07-04 14:34:38.939949292 -0400
@@ -310,8 +310,10 @@ static void esdhc_writeb_le(struct sdhci
SDHCI_CTRL_D3CD);
/* ensure the endianess */
new_val |= ESDHC_HOST_CONTROL_LE;
- /* DMA mode bits are shifted */
- new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
+ if (!is_imx25_esdhc(imx_data)) { // bits 8&9 are reserved on mx25
+ /* DMA mode bits are shifted */
+ new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
+ }
esdhc_clrset_le(host, 0xffff, new_val, reg);
return;
--
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