[PATCH] sunxi: R528: add SMHC2 pin pull ups support

[Andre Przywara]

On Sun, 24 Sep 2023 13:21:16 +0300
Okhunjon Sobirjonov <okhunjon72 at gmail.com> wrote:

Hi Okhunjon,

thanks for sending this!

> Added support for on-chip EMMC(SMHC2) pin pull ups
> for sunxi R528 board. Otherwise, "No pinmux setup
> defined for MMC2" appears. Moreover, adding
> CONFIG_MMC_SUNXI_SLOT_EXTRA=2 to defconfig might be
> needed in order to inform SPL code that another MMC instance on
> top of the default 0 for booting should be considered.

The patch itself looks alright, but sunxi_mmc_init() in
drivers/mmc/sunxi_mmc.c seems to enable 8-bit mode for MMC2. Can you
double check this?

> Signed-off-by: Okhunjon Sobirjonov <Okhunjon.Sobirjonov at Mec-electronics.com>

Reviewed-by: Andre Przywara <andre.przywara at arm.com>

I will integrate this patch into v2 of the T113s support series.

Cheers,
Andre

> ---
>  board/sunxi/board.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/board/sunxi/board.c b/board/sunxi/board.c
> index f321cd58a6..764a1ea998 100644
> --- a/board/sunxi/board.c
> +++ b/board/sunxi/board.c
> @@ -482,6 +482,13 @@ static void mmc_pinmux_setup(int sdc)
>  			sunxi_gpio_set_pull(pin, SUNXI_GPIO_PULL_UP);
>  			sunxi_gpio_set_drv(pin, 2);
>  		}
> +#elif defined(CONFIG_MACH_SUN8I_R528)
> +                /* SDC2: PC2-PC7 */
> +                for (pin = SUNXI_GPC(2); pin <= SUNXI_GPC(7); pin++) {
> +                        sunxi_gpio_set_cfgpin(pin, SUNXI_GPC_SDC2);
> +                        sunxi_gpio_set_pull(pin, SUNXI_GPIO_PULL_UP);
> +                        sunxi_gpio_set_drv(pin, 2);
> +                }
>  #else
>  		puts("ERROR: No pinmux setup defined for MMC2!\n");
>  #endif