Hi,
Fabio Estevam wrote:
> Hi Dong,
>
> I have tested the following patch to add support for the emmc port on
> mx6qsabresd:
>
> --- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
> @@ -444,6 +444,21 @@
> MX6QDL_PAD_SD3_DAT7__SD3_DATA7
> 0x17059
> >;
> };
> +
> + pinctrl_usdhc4: usdhc4grp {
> + fsl,pins = <
> + MX6QDL_PAD_SD4_CMD__SD4_CMD
> 0x17059
> + MX6QDL_PAD_SD4_CLK__SD4_CLK
> 0x10059
> + MX6QDL_PAD_SD4_DAT0__SD4_DATA0
> 0x17059
> + MX6QDL_PAD_SD4_DAT1__SD4_DATA1
> 0x17059
> + MX6QDL_PAD_SD4_DAT2__SD4_DATA2
> 0x17059
> + MX6QDL_PAD_SD4_DAT3__SD4_DATA3
> 0x17059
> + MX6QDL_PAD_SD4_DAT4__SD4_DATA4
> 0x17059
> + MX6QDL_PAD_SD4_DAT5__SD4_DATA5
> 0x17059
> + MX6QDL_PAD_SD4_DAT6__SD4_DATA6
> 0x17059
> + MX6QDL_PAD_SD4_DAT7__SD4_DATA7
> 0x17059
[...]
>
> Is there any extra patch I need to apply? I am running linux-next 20140506.
>
I'm using the pad settings 0x070b1 for our i.MX6 module with eMMC.
At least you should probably drop the HYS setting (0x10000), since
according to my experience the SD interface works much better with
hysteresis disabled.
Lothar Waßmann
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