Hi,
On Tue, Jul 17 2012, Wilson & Cassie wrote:
> 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;
Thanks, pushed to mmc-next for 3.6.
- Chris.
--
Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/>
One Laptop Per Child
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
