[PATCH v2 2/2] mmc: stm32_sdmmc2: Use mmc_of_parse() to read host capabilities

[Patrice CHOTARD]

Hi Alexandru

On 9/15/20 9:51 PM, Alexandru Gagniuc wrote:
> mmc_of_parse() can populate the 'f_max' and 'host_caps' fields of
> struct mmc_config from devicetree.
> The same logic is duplicated in stm32_sdmmc2_probe(). Use
> mmc_of_parse(), which is more generic.
>
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> ---
> Changes from v1:
>  - Check the return value of mmc_of_parse().
>  - The call to mmc_of_parse() is moved further up. This means we can just
>    'return err' on error instead of exiting via goto.
>
>  drivers/mmc/stm32_sdmmc2.c | 24 ++++++------------------
>  1 file changed, 6 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/mmc/stm32_sdmmc2.c b/drivers/mmc/stm32_sdmmc2.c
> index 6d50356217..a29657429c 100644
> --- a/drivers/mmc/stm32_sdmmc2.c
> +++ b/drivers/mmc/stm32_sdmmc2.c
> @@ -653,6 +653,12 @@ static int stm32_sdmmc2_probe(struct udevice *dev)
>  	if (priv->base == FDT_ADDR_T_NONE)
>  		return -EINVAL;
>  
> +	cfg->host_caps = 0;
> +	cfg->f_max = 52000000;
> +	ret = mmc_of_parse(dev, cfg);
> +	if (ret < 0)
> +		return ret;
> +
>  	if (dev_read_bool(dev, "st,neg-edge"))
>  		priv->clk_reg_msk |= SDMMC_CLKCR_NEGEDGE;
>  	if (dev_read_bool(dev, "st,sig-dir"))
> @@ -676,28 +682,10 @@ static int stm32_sdmmc2_probe(struct udevice *dev)
>  			     GPIOD_IS_IN);
>  
>  	cfg->f_min = 400000;
> -	cfg->f_max = dev_read_u32_default(dev, "max-frequency", 52000000);
>  	cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
>  	cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
>  	cfg->name = "STM32 SD/MMC";
>  
> -	cfg->host_caps = 0;
> -	if (cfg->f_max > 25000000)
> -		cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
> -
> -	switch (dev_read_u32_default(dev, "bus-width", 1)) {
> -	case 8:
> -		cfg->host_caps |= MMC_MODE_8BIT;
> -		/* fall through */
> -	case 4:
> -		cfg->host_caps |= MMC_MODE_4BIT;
> -		break;
> -	case 1:
> -		break;
> -	default:
> -		pr_err("invalid \"bus-width\" property, force to 1\n");
> -	}
> -
>  	upriv->mmc = &plat->mmc;
>  
>  	/* SDMMC init */

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

Thanks