From e9ed8835e99047422e09a192c0f61564d501d49b Mon Sep 17 00:00:00 2001
From: Shawn Lin <shawn.lin@rock-chips.com>
Date: Wed, 12 Oct 2016 10:50:35 +0800
Subject: [PATCH] mmc: dw_mmc: add runtime PM callback
This patch add dw_mci_runtime_suspend/resume interfaces
and expose it to dw_mci variant driver to support runtime
PM.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/mmc/host/dw_mmc.c | 32 ++++++++++++++++++++++++++++++--
drivers/mmc/host/dw_mmc.h | 4 +++-
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index df478ae72e232..875ce2d0ac872 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -3267,7 +3267,7 @@ EXPORT_SYMBOL(dw_mci_remove);
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
/*
* TODO: we should probably disable the clock to the card in the suspend path.
*/
@@ -3325,7 +3325,35 @@ int dw_mci_resume(struct dw_mci *host)
return 0;
}
EXPORT_SYMBOL(dw_mci_resume);
-#endif /* CONFIG_PM_SLEEP */
+
+int dw_mci_runtime_suspend(struct device *dev)
+{
+ int err = 0;
+ struct dw_mci *host = dev_get_drvdata(dev);
+
+ err = dw_mci_suspend(host);
+ if (err)
+ return err;
+
+ clk_disable_unprepare(host->ciu_clk);
+
+ return err;
+}
+EXPORT_SYMBOL(dw_mci_runtime_suspend);
+
+int dw_mci_runtime_resume(struct device *dev)
+{
+ int ret = 0;
+ struct dw_mci *host = dev_get_drvdata(dev);
+
+ ret = clk_prepare_enable(host->ciu_clk);
+ if (ret)
+ return ret;
+
+ return dw_mci_resume(host);
+}
+EXPORT_SYMBOL(dw_mci_runtime_resume);
+#endif /* CONFIG_PM */
static int __init dw_mci_init(void)
{
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index e8cd2dec3263d..d14a391eb7092 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -234,9 +234,11 @@
extern int dw_mci_probe(struct dw_mci *host);
extern void dw_mci_remove(struct dw_mci *host);
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
extern int dw_mci_suspend(struct dw_mci *host);
extern int dw_mci_resume(struct dw_mci *host);
+extern int dw_mci_runtime_suspend(struct device *device);
+extern int dw_mci_runtime_resume(struct device *device);
#endif
/**