linux-kernel - [PATCH] drivers/rtc/rtc-mrst: Fix suspend/resume

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Date:	Sun, 15 Mar 2015 15:18:29 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Alessandro Zummo <a.zummo@...ertech.it>
Cc:	Feng Tang <feng.tang@...el.com>, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH] drivers/rtc/rtc-mrst: Fix suspend/resume

The Moorestown RTC driver implements suspend and resume callbacks and
assigns them to the suspend and resume fields of the device_driver struct.
These callbacks are never actually called by anything though.

Modify the driver to properly use dev_pm_ops so that the suspend and resume
functions are actually executed upon suspend/resume.

Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
---
 drivers/rtc/rtc-mrst.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c
index ab02bda..175a5fb 100644
--- a/drivers/rtc/rtc-mrst.c
+++ b/drivers/rtc/rtc-mrst.c
@@ -415,8 +415,8 @@ static void rtc_mrst_do_remove(struct device *dev)
 	mrst->dev = NULL;
 }
 
-#ifdef	CONFIG_PM
-static int mrst_suspend(struct device *dev, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int mrst_suspend(struct device *dev)
 {
 	struct mrst_rtc	*mrst = dev_get_drvdata(dev);
 	unsigned char	tmp;
@@ -455,7 +455,7 @@ static int mrst_suspend(struct device *dev, pm_message_t mesg)
  */
 static inline int mrst_poweroff(struct device *dev)
 {
-	return mrst_suspend(dev, PMSG_HIBERNATE);
+	return mrst_suspend(dev);
 }
 
 static int mrst_resume(struct device *dev)
@@ -492,9 +492,11 @@ static int mrst_resume(struct device *dev)
 	return 0;
 }
 
+static SIMPLE_DEV_PM_OPS(mrst_pm_ops, mrst_suspend, mrst_resume);
+#define MRST_PM_OPS (&mrst_pm_ops)
+
 #else
-#define	mrst_suspend	NULL
-#define	mrst_resume	NULL
+#define MRST_PM_OPS NULL
 
 static inline int mrst_poweroff(struct device *dev)
 {
@@ -531,9 +533,8 @@ static struct platform_driver vrtc_mrst_platform_driver = {
 	.remove		= vrtc_mrst_platform_remove,
 	.shutdown	= vrtc_mrst_platform_shutdown,
 	.driver = {
-		.name		= (char *) driver_name,
-		.suspend	= mrst_suspend,
-		.resume		= mrst_resume,
+		.name	= (char *) driver_name,
+		.pm	= MRST_PM_OPS,
 	}
 };
 
-- 
1.8.0

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