[U-Boot] [PATCH v3 2/2] mx23evk: Add initial board support

[Fabio Estevam]

On Wed, Jan 23, 2013 at 12:54 PM, Otavio Salvador
<otavio at ossystems.com.br> wrote:

> +
> +       /* MMC 0 */
> +       MX23_PAD_SSP1_DATA0__SSP1_DATA0 | MUX_CONFIG_SSP1,
> +       MX23_PAD_SSP1_DATA1__SSP1_DATA1 | MUX_CONFIG_SSP1,
> +       MX23_PAD_SSP1_DATA2__SSP1_DATA2 | MUX_CONFIG_SSP1,
> +       MX23_PAD_SSP1_DATA3__SSP1_DATA3 | MUX_CONFIG_SSP1,
> +       MX23_PAD_GPMI_D08__SSP1_DATA4 | MUX_CONFIG_SSP1,
> +       MX23_PAD_GPMI_D09__SSP1_DATA5 | MUX_CONFIG_SSP1,
> +       MX23_PAD_GPMI_D10__SSP1_DATA6 | MUX_CONFIG_SSP1,
> +       MX23_PAD_GPMI_D11__SSP1_DATA7 | MUX_CONFIG_SSP1,
> +       MX23_PAD_SSP1_CMD__SSP1_CMD | MUX_CONFIG_SSP1,
> +       MX23_PAD_SSP1_DETECT__SSP1_DETECT | MUX_CONFIG_SSP1,

In order to avoid pin conflicts in the future, in case we add splash
screen support,  I would suggest you to use only 4-bit MMC mode.

Please look at imx23-evk.dts in Linux to understand how this is done,
especially this commit:

commit 72beabae635b9485510ccf8093df319f59eb6688
Author: Shawn Guo <shawn.guo at linaro.org>
Date:   Thu Jun 28 11:44:59 2012 +0800

    ARM: dts: imx23-evk: updates for mmc device

    The 8-bit mode mmc has pin conflicts with display.  Let's use 4-bit
    mode by default, so that display can be enabled together later.

    Also add vmmc-supply for mmc device.

    Signed-off-by: Shawn Guo <shawn.guo at linaro.org>