linux-kernel - [PATCH 4/8] rtc: rtc-omap: convert omap_rtc_driver to dev_pm

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Message-id: <001301ce2b8f$9c0b0a50$d4211ef0$%han@samsung.com>
Date:	Thu, 28 Mar 2013 17:38:23 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Morton' <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	'Alessandro Zummo' <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, 'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH 4/8] rtc: rtc-omap: convert omap_rtc_driver to dev_pm_ops

Instead of using legacy suspend/resume methods, using newer dev_pm_ops
structure allows better control over power management.

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/rtc/rtc-omap.c |   24 ++++++++++--------------
 1 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index a1f9d30..4e1bdb8 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -464,11 +464,10 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 static u8 irqstat;
 
-static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int omap_rtc_suspend(struct device *dev)
 {
 	irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
 
@@ -476,34 +475,32 @@ static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 	 * source, and in fact this enable() call is just saving a flag
 	 * that's never used...
 	 */
-	if (device_may_wakeup(&pdev->dev))
+	if (device_may_wakeup(dev))
 		enable_irq_wake(omap_rtc_alarm);
 	else
 		rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
 
 	/* Disable the clock/module */
-	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_put_sync(dev);
 
 	return 0;
 }
 
-static int omap_rtc_resume(struct platform_device *pdev)
+static int omap_rtc_resume(struct device *dev)
 {
 	/* Enable the clock/module so that we can access the registers */
-	pm_runtime_get_sync(&pdev->dev);
+	pm_runtime_get_sync(dev);
 
-	if (device_may_wakeup(&pdev->dev))
+	if (device_may_wakeup(dev))
 		disable_irq_wake(omap_rtc_alarm);
 	else
 		rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
 	return 0;
 }
-
-#else
-#define omap_rtc_suspend NULL
-#define omap_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume);
+
 static void omap_rtc_shutdown(struct platform_device *pdev)
 {
 	rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
@@ -512,12 +509,11 @@ static void omap_rtc_shutdown(struct platform_device *pdev)
 MODULE_ALIAS("platform:omap_rtc");
 static struct platform_driver omap_rtc_driver = {
 	.remove		= __exit_p(omap_rtc_remove),
-	.suspend	= omap_rtc_suspend,
-	.resume		= omap_rtc_resume,
 	.shutdown	= omap_rtc_shutdown,
 	.driver		= {
 		.name	= DRIVER_NAME,
 		.owner	= THIS_MODULE,
+		.pm	= &omap_rtc_pm_ops,
 		.of_match_table = of_match_ptr(omap_rtc_of_match),
 	},
 	.id_table	= omap_rtc_devtype,
-- 
1.7.2.5


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