[U-Boot] [PATCH 4/4] dw_mmc: turn on the IO supply

["Heiko Stübner" <heiko@sntech.de>]

Am Freitag, 22. März 2019, 20:14:36 CET schrieb Urja Rannikko:
> Fixes the microSD slot on the ASUS C201.
> 
> Signed-off-by: Urja Rannikko <urjaman@gmail.com>
> ---
>  drivers/mmc/dw_mmc.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
> index 93a836eac3..e1960b213a 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
>  
> @@ -440,6 +441,7 @@ static int dwmci_set_ios(struct mmc *mmc)
>  #endif
>  	struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
>  	u32 ctype, regs;
> +	int ret;
>  
>  	debug("Buswidth = %d, clock: %d\n", mmc->bus_width, mmc->clock);
>  
> @@ -469,6 +471,19 @@ static int dwmci_set_ios(struct mmc *mmc)
>  	if (host->clksel)
>  		host->clksel(host);
>  
> +#ifdef CONFIG_DM_REGULATOR

this should be 
	#if CONFIG_IS_ENABLED(DM_REGULATOR)

because otherwise an SPL-build using the mmc driver may fail with

drivers/mmc/dw_mmc.c: In function ‘dwmci_set_ios’:
drivers/mmc/dw_mmc.c:475:9: error: ‘struct mmc’ has no member named ‘vqmmc_supply’
  if (mmc->vqmmc_supply) {
         ^~
drivers/mmc/dw_mmc.c:477:27: error: ‘struct mmc’ has no member named ‘vqmmc_supply’
    regulator_set_value(mmc->vqmmc_supply, 1800000);
                           ^~
drivers/mmc/dw_mmc.c:479:27: error: ‘struct mmc’ has no member named ‘vqmmc_supply’
    regulator_set_value(mmc->vqmmc_supply, 3300000);
                           ^~
drivers/mmc/dw_mmc.c:481:44: error: ‘struct mmc’ has no member named ‘vqmmc_supply’
   ret = regulator_set_enable_if_allowed(mmc->vqmmc_supply, true);


> +	if (mmc->vqmmc_supply) {
> +		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
> +
>  	return 0;
>  }
>  
>