| Message ID | 1554305964-19347-1-git-send-email-skomatineni@nvidia.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [V3] mmc: tegra: add sdhci tegra suspend and resume | expand |
On Wed, 3 Apr 2019 at 17:39, 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> > --- > drivers/mmc/host/sdhci-tegra.c | 56 +++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 55 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c > index eafaaefab4a6..5ec304166566 100644 > --- a/drivers/mmc/host/sdhci-tegra.c > +++ b/drivers/mmc/host/sdhci-tegra.c > @@ -1611,11 +1611,65 @@ static int sdhci_tegra_remove(struct platform_device *pdev) > return 0; > } > sdhci_suspend_host() exists only if CONFIG_PM is set. Therefore, I think it's better to add explicit check for that. So add the ifdef like below, and a corresponding #endif, after the implementation of sdhci_tegra_resume(). #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; > +} > + > +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 > Otherwise this looks good to me. Kind regards Uffe
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index eafaaefab4a6..5ec304166566 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -1611,11 +1611,65 @@ static int sdhci_tegra_remove(struct platform_device *pdev) return 0; } +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; +} + +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,