From 71c733c4e1aeb83e8221e89caeec893d51f88b7b Mon Sep 17 00:00:00 2001 From: Sowjanya Komatineni Date: Thu, 11 Apr 2019 12:18:19 -0700 Subject: [PATCH] mmc: tegra: add sdhci tegra suspend and resume This patch adds suspend and resume PM ops for tegra SDHCI. Acked-by: Thierry Reding Signed-off-by: Sowjanya Komatineni Signed-off-by: Ulf Hansson --- 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, -- 2.30.2