[U-Boot] [PATCH v3 9/9] arm: dts: sunxi: Enumerate MMC2 as MMC1

Vasily Khoruzhick
2019-01-21T15:38:19Z

On Mon, Jan 21, 2019 at 2:32 AM Jagan Teki <jagan@amarulasolutions.com> wrote:
>
> Environment and fastboot MMC devices are configured based number
> of mmc slots defined on particular board in sunxi platform.
>
> If number of slots are not more than 1, it assigns 0 which usually mmc
> device on SD slot. With DM_MMC it is detected as 0 since mmc0 node always
> be an mmc device.
>
> If number of slots are more than 1, it assigns 1 which assumes 0 is mmc
> device and 1 is emmc device. But with DM_MMC there is chance of detecting
> emmc as device 2 since mmc1 is SDIO as per devicetree definition.
>
> So override mmc2 to mmc1 in sunxi dtsi, this will eventually detect mmc2
> as mmc 1 device even if the board dts has mmc0, mmc1, mmc2.

It doesn't work on Pinebook - where we have mmc0 (SD card), mmc1
(SDIO), mmc2 (eMMC). It still enumerates mmc2 as mmc2.

> Some platforms like A20 has mmc0...mmc3, but there is no usecases now for
> enabling all mmc controllers in any of A20 board dts files.
>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> ---
> arch/arm/dts/sunxi-u-boot.dtsi | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/arch/arm/dts/sunxi-u-boot.dtsi b/arch/arm/dts/sunxi-u-boot.dtsi
> index 8a9f2a6417..fdd4c80aa4 100644
> --- a/arch/arm/dts/sunxi-u-boot.dtsi
> +++ b/arch/arm/dts/sunxi-u-boot.dtsi
> @@ -1,6 +1,10 @@
> #include <config.h>
>
> / {
> + aliases {
> + mmc1 = &mmc2;
> + };
> +
> binman {
> filename = "u-boot-sunxi-with-spl.bin";
> pad-byte = <0xff>;
> --
> 2.18.0.321.gffc6fa0e3
>