Re: [PATCH V4] mmc: tegra: add sdhci tegra suspend and resume

From: Ulf Hansson <ulf.hansson@linaro.org>
To: Sowjanya Komatineni <skomatineni@nvidia.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jon Hunter <jonathanh@nvidia.com>, Timo Alho <talho@nvidia.com>,
	Aniruddha Tvs Rao <anrao@nvidia.com>,
	bbiswas@nvidia.com, linux-tegra <linux-tegra@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Subject: Re: [PATCH V4] mmc: tegra: add sdhci tegra suspend and resume
Date: Mon, 15 Apr 2019 12:06:33 +0200	[thread overview]
Message-ID: <CAPDyKFo+jwFJQUtTRnejX7CzJEOmfpYwX5ZwnMNHPK=wfW-Ycg@mail.gmail.com> (raw)
In-Reply-To: <1555010299-19141-1-git-send-email-skomatineni@nvidia.com>

On Thu, 11 Apr 2019 at 21:18, Sowjanya Komatineni
<skomatineni@nvidia.com> wrote:
>
> This patch adds suspend and resume PM ops for tegra SDHCI.
>
> Acked-by: Thierry Reding <treding@nvidia.com>
> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>

Applied for next, thanks!

Kind regards
Uffe

> ---
>  drivers/mmc/host/sdhci-tegra.c | 58 +++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 57 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index eafaaefab4a6..f608417ae967 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -1611,11 +1611,67 @@ static int sdhci_tegra_remove(struct platform_device *pdev)
>         return 0;
>  }
>
> +#ifdef CONFIG_PM_SLEEP
> +static int __maybe_unused sdhci_tegra_suspend(struct device *dev)
> +{
> +       struct sdhci_host *host = dev_get_drvdata(dev);
> +       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +       int ret;
> +
> +       if (host->mmc->caps2 & MMC_CAP2_CQE) {
> +               ret = cqhci_suspend(host->mmc);
> +               if (ret)
> +                       return ret;
> +       }
> +
> +       ret = sdhci_suspend_host(host);
> +       if (ret) {
> +               cqhci_resume(host->mmc);
> +               return ret;
> +       }
> +
> +       clk_disable_unprepare(pltfm_host->clk);
> +       return 0;
> +}
> +
> +static int __maybe_unused sdhci_tegra_resume(struct device *dev)
> +{
> +       struct sdhci_host *host = dev_get_drvdata(dev);
> +       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +       int ret;
> +
> +       ret = clk_prepare_enable(pltfm_host->clk);
> +       if (ret)
> +               return ret;
> +
> +       ret = sdhci_resume_host(host);
> +       if (ret)
> +               goto disable_clk;
> +
> +       if (host->mmc->caps2 & MMC_CAP2_CQE) {
> +               ret = cqhci_resume(host->mmc);
> +               if (ret)
> +                       goto suspend_host;
> +       }
> +
> +       return 0;
> +
> +suspend_host:
> +       sdhci_suspend_host(host);
> +disable_clk:
> +       clk_disable_unprepare(pltfm_host->clk);
> +       return ret;
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(sdhci_tegra_dev_pm_ops, sdhci_tegra_suspend,
> +                        sdhci_tegra_resume);
> +
>  static struct platform_driver sdhci_tegra_driver = {
>         .driver         = {
>                 .name   = "sdhci-tegra",
>                 .of_match_table = sdhci_tegra_dt_match,
> -               .pm     = &sdhci_pltfm_pmops,
> +               .pm     = &sdhci_tegra_dev_pm_ops,
>         },
>         .probe          = sdhci_tegra_probe,
>         .remove         = sdhci_tegra_remove,
> --
> 2.7.4
>