[U-Boot] [PATCH 4/8] x86: baytrail: Configure card detect pin of the SD controller

[Stefan Roese]

On 08.06.2016 14:07, Bin Meng wrote:
> As of today, the latest version FSP (gold4) for BayTrail misses the
> PAD configuration of the SD controller's Card Detect signal. The
> default PAD value for the CD pin sets the pin to work in GPIO mode,
> which causes card detect status cannot be reflected by the Present
> State register in the SD controller (bit 16 & bit 18 are always zero).
>
> Add a configuration for this pin in the pinctrl node.
>
> Note I've checked the PAD configuration for all the pins in all the
> 3 controllers (eMMC/SDIO/SD). Only this SDMMC3_CD_B pin does not get
> initialized to correct mode by FSP. With fsp,emmc-boot-mode set to
> 2 (eMMC 4.1), eMMC pins are initialized to func 1, but if we set
> fsp,emmc-boot-mode to 1 (auto), those pins are initialized to func 3
> which is correct according to datasheet.
>
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>

Reviewed-by: Stefan Roese <sr at denx.de>

Thanks,
Stefan