linux-kernel - Re: [PATCH v13 12/15] mmc: sdhci-cadence: Support device specific init during probe

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Message-ID: <CAPDyKFrJULviF7+LJZmC89AfyKrcPFtthPY2fb9a=9aqpJcCEA@mail.gmail.com>
Date:   Mon, 17 Apr 2023 16:54:15 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Brad Larson <blarson@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-spi@...r.kernel.org,
        adrian.hunter@...el.com, alcooperx@...il.com,
        andy.shevchenko@...il.com, arnd@...db.de,
        brendan.higgins@...ux.dev, briannorris@...omium.org,
        brijeshkumar.singh@....com, catalin.marinas@....com,
        davidgow@...gle.com, gsomlo@...il.com, gerg@...ux-m68k.org,
        krzk@...nel.org, krzysztof.kozlowski+dt@...aro.org, lee@...nel.org,
        lee.jones@...aro.org, broonie@...nel.org,
        yamada.masahiro@...ionext.com, p.zabel@...gutronix.de,
        piotrs@...ence.com, p.yadav@...com, rdunlap@...radead.org,
        robh+dt@...nel.org, samuel@...lland.org, fancer.lancer@...il.com,
        skhan@...uxfoundation.org, suravee.suthikulpanit@....com,
        thomas.lendacky@....com, tonyhuang.sunplus@...il.com,
        vaishnav.a@...com, will@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v13 12/15] mmc: sdhci-cadence: Support device specific
 init during probe

On Mon, 10 Apr 2023 at 20:47, Brad Larson <blarson@....com> wrote:
>
> Move struct sdhci_pltfm_data under new struct sdhci_cdns_drv_data.
> Add an init() into sdhci_cdns_drv_data for platform specific device
> initialization in the device probe which is not used for existing devices.
>
> Signed-off-by: Brad Larson <blarson@....com>
> Acked-by: Adrian Hunter <adrian.hunter@...el.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>
> v10 changes:
> - New patch to provide for platform specific init() with no change
>   to existing designs.
>
> ---
>  drivers/mmc/host/sdhci-cadence.c | 32 +++++++++++++++++++++++---------
>  1 file changed, 23 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
> index 708d4297f241..c528a25f48b8 100644
> --- a/drivers/mmc/host/sdhci-cadence.c
> +++ b/drivers/mmc/host/sdhci-cadence.c
> @@ -77,6 +77,11 @@ struct sdhci_cdns_phy_cfg {
>         u8 addr;
>  };
>
> +struct sdhci_cdns_drv_data {
> +       int (*init)(struct platform_device *pdev);
> +       const struct sdhci_pltfm_data pltfm_data;
> +};
> +
>  static const struct sdhci_cdns_phy_cfg sdhci_cdns_phy_cfgs[] = {
>         { "cdns,phy-input-delay-sd-highspeed", SDHCI_CDNS_PHY_DLY_SD_HS, },
>         { "cdns,phy-input-delay-legacy", SDHCI_CDNS_PHY_DLY_SD_DEFAULT, },
> @@ -325,13 +330,17 @@ static const struct sdhci_ops sdhci_cdns_ops = {
>         .set_uhs_signaling = sdhci_cdns_set_uhs_signaling,
>  };
>
> -static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = {
> -       .ops = &sdhci_cdns_ops,
> -       .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +static const struct sdhci_cdns_drv_data sdhci_cdns_uniphier_drv_data = {
> +       .pltfm_data = {
> +               .ops = &sdhci_cdns_ops,
> +               .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +       },
>  };
>
> -static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = {
> -       .ops = &sdhci_cdns_ops,
> +static const struct sdhci_cdns_drv_data sdhci_cdns_drv_data = {
> +       .pltfm_data = {
> +               .ops = &sdhci_cdns_ops,
> +       },
>  };
>
>  static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc,
> @@ -357,7 +366,7 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc,
>  static int sdhci_cdns_probe(struct platform_device *pdev)
>  {
>         struct sdhci_host *host;
> -       const struct sdhci_pltfm_data *data;
> +       const struct sdhci_cdns_drv_data *data;
>         struct sdhci_pltfm_host *pltfm_host;
>         struct sdhci_cdns_priv *priv;
>         struct clk *clk;
> @@ -376,10 +385,10 @@ static int sdhci_cdns_probe(struct platform_device *pdev)
>
>         data = of_device_get_match_data(dev);
>         if (!data)
> -               data = &sdhci_cdns_pltfm_data;
> +               data = &sdhci_cdns_drv_data;
>
>         nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node);
> -       host = sdhci_pltfm_init(pdev, data,
> +       host = sdhci_pltfm_init(pdev, &data->pltfm_data,
>                                 struct_size(priv, phy_params, nr_phy_params));
>         if (IS_ERR(host)) {
>                 ret = PTR_ERR(host);
> @@ -397,6 +406,11 @@ static int sdhci_cdns_probe(struct platform_device *pdev)
>         host->ioaddr += SDHCI_CDNS_SRS_BASE;
>         host->mmc_host_ops.hs400_enhanced_strobe =
>                                 sdhci_cdns_hs400_enhanced_strobe;
> +       if (data->init) {
> +               ret = data->init(pdev);
> +               if (ret)
> +                       goto free;
> +       }
>         sdhci_enable_v4_mode(host);
>         __sdhci_read_caps(host, &version, NULL, NULL);
>
> @@ -461,7 +475,7 @@ static const struct dev_pm_ops sdhci_cdns_pm_ops = {
>  static const struct of_device_id sdhci_cdns_match[] = {
>         {
>                 .compatible = "socionext,uniphier-sd4hc",
> -               .data = &sdhci_cdns_uniphier_pltfm_data,
> +               .data = &sdhci_cdns_uniphier_drv_data,
>         },
>         { .compatible = "cdns,sd4hc" },
>         { /* sentinel */ }
> --
> 2.17.1
>