linux-kernel - Re: [PATCH] mmc: sdhci-of-dwcmshc: add suspend/resume support

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Message-ID: <CAPDyKFqD2YKbQYAFSZT=v2kwT4ssW79Zxda0NAUtbUaq4CEQwA@mail.gmail.com>
Date:   Fri, 15 May 2020 09:09:28 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdhci-of-dwcmshc: add suspend/resume support

On Fri, 15 May 2020 at 08:19, Jisheng Zhang <Jisheng.Zhang@...aptics.com> wrote:
>
> Add dwcmshc specific system-level suspend and resume support.
>
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/sdhci-of-dwcmshc.c | 43 +++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index a9ed0e006e06..64ac0dbee95c 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -163,6 +163,48 @@ static int dwcmshc_remove(struct platform_device *pdev)
>         return 0;
>  }
>
> +#ifdef CONFIG_PM_SLEEP
> +static int dwcmshc_suspend(struct device *dev)
> +{
> +       struct sdhci_host *host = dev_get_drvdata(dev);
> +       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +       struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
> +       int ret;
> +
> +       ret = sdhci_suspend_host(host);
> +       if (ret)
> +               return ret;
> +
> +       clk_disable_unprepare(pltfm_host->clk);
> +       if (!IS_ERR(priv->bus_clk))
> +               clk_disable_unprepare(priv->bus_clk);
> +
> +       return ret;
> +}
> +
> +static int dwcmshc_resume(struct device *dev)
> +{
> +       struct sdhci_host *host = dev_get_drvdata(dev);
> +       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +       struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
> +       int ret;
> +
> +       ret = clk_prepare_enable(pltfm_host->clk);
> +       if (ret)
> +               return ret;
> +
> +       if (!IS_ERR(priv->bus_clk)) {
> +               ret = clk_prepare_enable(priv->bus_clk);
> +               if (ret)
> +                       return ret;
> +       }
> +
> +       return sdhci_resume_host(host);
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(dwcmshc_pmops, dwcmshc_suspend, dwcmshc_resume);
> +
>  static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
>         { .compatible = "snps,dwcmshc-sdhci" },
>         {}
> @@ -173,6 +215,7 @@ static struct platform_driver sdhci_dwcmshc_driver = {
>         .driver = {
>                 .name   = "sdhci-dwcmshc",
>                 .of_match_table = sdhci_dwcmshc_dt_ids,
> +               .pm = &dwcmshc_pmops,
>         },
>         .probe  = dwcmshc_probe,
>         .remove = dwcmshc_remove,
> --
> 2.26.2
>