[U-Boot] [PATCH v3] dw_mmc: turn on the IO supply

[Peng Fan]

> Subject: [U-Boot] [PATCH v3] dw_mmc: turn on the IO supply
> 
> Fixes the microSD slot on the ASUS C201.
> 
> Signed-off-by: Urja Rannikko <urjaman at gmail.com>
> ---
> v2: use #if CONFIG_IS_ENABLED(DM_REGULATOR)
> v3: Move ret variable inside the if block (only used there)
> ---
>  drivers/mmc/dw_mmc.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index
> 1992d61182..22f6c7eefd 100644
> --- a/drivers/mmc/dw_mmc.c
> +++ b/drivers/mmc/dw_mmc.c
> @@ -13,6 +13,7 @@
>  #include <mmc.h>
>  #include <dwmmc.h>
>  #include <wait_bit.h>
> +#include <power/regulator.h>
> 
>  #define PAGE_SIZE 4096
> 
> @@ -493,6 +494,21 @@ static int dwmci_set_ios(struct mmc *mmc)
>  	if (host->clksel)
>  		host->clksel(host);
> 
> +#if CONFIG_IS_ENABLED(DM_REGULATOR)
> +	if (mmc->vqmmc_supply) {
> +		int ret;
> +
> +		if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
> +			regulator_set_value(mmc->vqmmc_supply, 1800000);
> +		else
> +			regulator_set_value(mmc->vqmmc_supply, 3300000);
> +
> +		ret = regulator_set_enable_if_allowed(mmc->vqmmc_supply, true);
> +		if (ret)
> +			return ret;
> +	}
> +#endif
> +

Reviewed-by: Peng Fan <peng.fan at nxp.com>

>  	return 0;
>  }
> 
> --
> 2.21.0
> 
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