rtc: rtc-puv3: convert puv3_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@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-puv3.c

@@ -207,14 +207,14 @@ static const struct rtc_class_ops puv3_rtcops = {
 	.proc	        = puv3_rtc_proc,
 };
 
-static void puv3_rtc_enable(struct platform_device *pdev, int en)
+static void puv3_rtc_enable(struct device *dev, int en)
 {
 	if (!en) {
 		writel(readl(RTC_RTSR) & ~RTC_RTSR_HZE, RTC_RTSR);
 	} else {
 		/* re-enable the device, and check it is ok */
 		if ((readl(RTC_RTSR) & RTC_RTSR_HZE) == 0) {
-			dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
+			dev_info(dev, "rtc disabled, re-enabling\n");
 			writel(readl(RTC_RTSR) | RTC_RTSR_HZE, RTC_RTSR);
 		}
 	}
@@ -276,7 +276,7 @@ static int puv3_rtc_probe(struct platform_device *pdev)
 		goto err_nores;
 	}
 
-	puv3_rtc_enable(pdev, 1);
+	puv3_rtc_enable(&pdev->dev, 1);
 
 	/* register RTC and exit */
 	rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops,
@@ -296,44 +296,41 @@ static int puv3_rtc_probe(struct platform_device *pdev)
 	return 0;
 
  err_nortc:
-	puv3_rtc_enable(pdev, 0);
+	puv3_rtc_enable(&pdev->dev, 0);
 	release_resource(puv3_rtc_mem);
 
  err_nores:
 	return ret;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 static int ticnt_save;
 
-static int puv3_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int puv3_rtc_suspend(struct device *dev)
 {
 	/* save RTAR for anyone using periodic interrupts */
 	ticnt_save = readl(RTC_RTAR);
-	puv3_rtc_enable(pdev, 0);
+	puv3_rtc_enable(dev, 0);
 	return 0;
 }
 
-static int puv3_rtc_resume(struct platform_device *pdev)
+static int puv3_rtc_resume(struct device *dev)
 {
-	puv3_rtc_enable(pdev, 1);
+	puv3_rtc_enable(dev, 1);
 	writel(ticnt_save, RTC_RTAR);
 	return 0;
 }
-#else
-#define puv3_rtc_suspend NULL
-#define puv3_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(puv3_rtc_pm_ops, puv3_rtc_suspend, puv3_rtc_resume);
+
 static struct platform_driver puv3_rtc_driver = {
 	.probe		= puv3_rtc_probe,
 	.remove		= puv3_rtc_remove,
-	.suspend	= puv3_rtc_suspend,
-	.resume		= puv3_rtc_resume,
 	.driver		= {
 		.name	= "PKUnity-v3-RTC",
 		.owner	= THIS_MODULE,
+		.pm	= &puv3_rtc_pm_ops,
 	}
 };