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Date: Fri, 16 Oct 2015 17:01:27 +0200
From: Ludovic Desroches <ludovic.desroches@...el.com>
To: <ulf.hansson@...aro.org>
CC: <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<nicolas.ferre@...el.com>,
Ludovic Desroches <ludovic.desroches@...el.com>
Subject: [PATCH] mmc: sdhci at91: add suspend/resume
Add suspend and resume PM ops.
Signed-off-by: Ludovic Desroches <ludovic.desroches@...el.com>
---
drivers/mmc/host/sdhci-of-at91.c | 55 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 54 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
index 06d0b50..b9751f2 100644
--- a/drivers/mmc/host/sdhci-of-at91.c
+++ b/drivers/mmc/host/sdhci-of-at91.c
@@ -51,6 +51,59 @@ static const struct of_device_id sdhci_at91_dt_match[] = {
{}
};
+#ifdef CONFIG_PM_SLEEP
+static int sdhci_at91_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_at91_priv *priv = pltfm_host->priv;
+ int ret;
+
+ ret = sdhci_suspend_host(host);
+ if (ret)
+ return ret;
+
+ clk_disable_unprepare(priv->gck);
+ clk_disable_unprepare(priv->hclock);
+ clk_disable_unprepare(priv->mainck);
+
+ return 0;
+}
+
+static int sdhci_at91_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_at91_priv *priv = pltfm_host->priv;
+ int ret;
+
+ ret = clk_prepare_enable(priv->mainck);
+ if (ret) {
+ dev_err(dev, "can't enable mainck\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(priv->hclock);
+ if (ret) {
+ dev_err(dev, "can't enable hclock\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(priv->gck);
+ if (ret) {
+ dev_err(dev, "can't enable gck\n");
+ return ret;
+ }
+
+ return sdhci_resume_host(host);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(sdhci_at91_dev_pm_ops, sdhci_at91_suspend,
+ sdhci_at91_resume);
+
static int sdhci_at91_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
@@ -178,7 +231,7 @@ static struct platform_driver sdhci_at91_driver = {
.driver = {
.name = "sdhci-at91",
.of_match_table = sdhci_at91_dt_match,
- .pm = SDHCI_PLTFM_PMOPS,
+ .pm = &sdhci_at91_dev_pm_ops,
},
.probe = sdhci_at91_probe,
.remove = sdhci_at91_remove,
--
2.5.0
--
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