Re: [PATCH 2/3] mmc: sdhci-msm: add MSM8998 SDCC specific compatible

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Hi,

On Mon, Jul 11, 2022 at 1:27 AM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
>
> Add a MSM8998-specific SDCC compatible, because using only a generic
> qcom,sdhci-msm-v4 fallback is deprecated.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
> ---
>  drivers/mmc/host/sdhci-msm.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index e395411fb6fd..bb169c1c2b5e 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -2447,6 +2447,7 @@ static const struct of_device_id sdhci_msm_dt_match[] = {
>         {.compatible = "qcom,msm8992-sdhci", .data = &sdhci_msm_mci_var},
>         {.compatible = "qcom,msm8994-sdhci", .data = &sdhci_msm_mci_var},
>         {.compatible = "qcom,msm8996-sdhci", .data = &sdhci_msm_mci_var},
> +       {.compatible = "qcom,msm8998-sdhci", .data = &sdhci_msm_mci_var},

FWIW I'm _against_ this change.

In my mind while it is correct to specify both the specific and
generic compatible string in the device tree, the driver itself should
rely on just the generic compatible string until there is a reason to
use the specific one (like we needed to for sdm845 and sc7180).

I think I pointed that out before, but somehow all of the specific
device tree strings have snuck their way into the driver without me
paying attention. :(

-Doug



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