linux-kernel - Re: [PATCH 4/4] mmc: dw_mmc: exynos: use common

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Message-ID: <bfb7cc7f-d01a-f99e-2085-d1b3e252d7dd@samsung.com>
Date:   Fri, 26 Nov 2021 08:38:20 +0900
From:   Jaehoon Chung <jh80.chung@...sung.com>
To:     John Keeping <john@...anate.com>, linux-mmc@...r.kernel.org
Cc:     Heiko Stuebner <heiko@...ech.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH 4/4] mmc: dw_mmc: exynos: use common_caps

On 11/25/21 3:46 AM, John Keeping wrote:
> Move the common MMC_CAP_CMD23 capability to common_caps so that only the
> special case of MMC_CAP_1_8V_DDR and MMC_CAP_8_BIT_DATA are set via
> caps/num_caps.  Both of those can, and should, be set via device tree
> properties instead, so we can now say that exynos_dwmmc_caps is only
> used for backwards compatibility.
> 
> Signed-off-by: John Keeping <john@...anate.com>


Reviewed-by: Jaehoon Chung <jh80.chung@...sung.com>

Added minor comment..

> ---
>  drivers/mmc/host/dw_mmc-exynos.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
> index c2dd29ef45c6..f76eeeb0cc53 100644
> --- a/drivers/mmc/host/dw_mmc-exynos.c
> +++ b/drivers/mmc/host/dw_mmc-exynos.c
> @@ -526,15 +526,16 @@ static int dw_mci_exynos_prepare_hs400_tuning(struct dw_mci *host,
>  
>  /* Common capabilities of Exynos4/Exynos5 SoC */
>  static unsigned long exynos_dwmmc_caps[4] = {
> -	MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23,
> -	MMC_CAP_CMD23,
> -	MMC_CAP_CMD23,
> -	MMC_CAP_CMD23,
> +	MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA,
> +	0,
> +	0,
> +	0,
>  };

It can be removed all things.

Best Regards,
Jaehoon Chung

>  
>  static const struct dw_mci_drv_data exynos_drv_data = {
>  	.caps			= exynos_dwmmc_caps,
>  	.num_caps		= ARRAY_SIZE(exynos_dwmmc_caps),
> +	.common_caps		= MMC_CAP_CMD23,
>  	.init			= dw_mci_exynos_priv_init,
>  	.set_ios		= dw_mci_exynos_set_ios,
>  	.parse_dt		= dw_mci_exynos_parse_dt,
>