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mmc: tegra: add sdhci tegra suspend and resume

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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>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Sowjanya Komatineni 2019-04-11 12:18:19 -07:00 committed by Ulf Hansson
parent c07a48c265
commit 71c733c4e1
1 changed files with 57 additions and 1 deletions
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58
drivers/mmc/host/sdhci-tegra.c
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@ -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,