[PATCH 1/2] mmc: mmc_of_parse: Enable 52 MHz support with "cap-mmc-highspeed"

[Patrice CHOTARD]

Hi Alexndru

On 9/15/20 9:51 PM, Alexandru Gagniuc wrote:
> "cap-mmc-highspeed" enables support for 26 MHz MMC, but there is no
> additional flag to enable 52 MHz MMC. In Linux. "cap-mmc-highspeed"
> is used for MMC HS at both 26MHz and 52MHz.
>
> Use the same approach and enable MMC_CAP(MMC_HS_52) host capability
> when "cap-mmc-highspeed" is found in the devicetree. In the event an
> MMC card doesn't support 52 MHz, it will be clocked at a speed based
> on its EXT CSD, even on 52 MHz host controllers
>
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> ---
>  drivers/mmc/mmc-uclass.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
> index 90690c8d1e..6d2310eff3 100644
> --- a/drivers/mmc/mmc-uclass.c
> +++ b/drivers/mmc/mmc-uclass.c
> @@ -198,7 +198,7 @@ int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
>  	if (dev_read_bool(dev, "cap-sd-highspeed"))
>  		cfg->host_caps |= MMC_CAP(SD_HS);
>  	if (dev_read_bool(dev, "cap-mmc-highspeed"))
> -		cfg->host_caps |= MMC_CAP(MMC_HS);
> +		cfg->host_caps |= MMC_CAP(MMC_HS) | MMC_CAP(MMC_HS_52);
>  	if (dev_read_bool(dev, "sd-uhs-sdr12"))
>  		cfg->host_caps |= MMC_CAP(UHS_SDR12);
>  	if (dev_read_bool(dev, "sd-uhs-sdr25"))

Reviewed-by: Patrice Chotard <patrice.chotard at st.com>

Thanks