From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <adrian.hunter@intel.com>, <ulf.hansson@linaro.org>,
<thierry.reding@gmail.com>, <jonathanh@nvidia.com>
Cc: <skomatineni@nvidia.com>, <talho@nvidia.com>, <anrao@nvidia.com>,
<bbiswas@nvidia.com>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-mmc@vger.kernel.org>
Subject: [PATCH V4] mmc: tegra: add sdhci tegra suspend and resume
Date: Thu, 11 Apr 2019 12:18:19 -0700 [thread overview]
Message-ID: <1555010299-19141-1-git-send-email-skomatineni@nvidia.com> (raw)
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 | 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
next reply other threads:[~2019-04-11 19:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-11 19:18 Sowjanya Komatineni [this message]
2019-04-15 10:06 ` [PATCH V4] mmc: tegra: add sdhci tegra suspend and resume Ulf Hansson
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