drivers/rtc/rtc-s3c.c: convert s3c_rtc to dev_pm_ops

Instead of using legacy suspend/resume methods, using newer dev_pm_ops
structure allows better control over power management.  Also, 'wake_en'
variable is moved, because it is only used when CONFIG_PM_SLEEP is
enabled.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 7dcf719..653a4dc 100644 (file)
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -51,7 +51,6 @@ static struct clk *rtc_clk;
 static void __iomem *s3c_rtc_base;
 static int s3c_rtc_alarmno = NO_IRQ;
 static int s3c_rtc_tickno  = NO_IRQ;
-static bool wake_en;
 static enum s3c_cpu_type s3c_rtc_cpu_type;
 
 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
@@ -579,14 +578,16 @@ static int s3c_rtc_probe(struct platform_device *pdev)
        return ret;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 /* RTC Power management control */
 
 static int ticnt_save, ticnt_en_save;
+static bool wake_en;
 
-static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int s3c_rtc_suspend(struct device *dev)
 {
+       struct platform_device *pdev = to_platform_device(dev);
+
        clk_enable(rtc_clk);
        /* save TICNT for anyone using periodic interrupts */
        ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
@@ -596,19 +597,20 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
        }
        s3c_rtc_enable(pdev, 0);
 
-       if (device_may_wakeup(&pdev->dev) && !wake_en) {
+       if (device_may_wakeup(dev) && !wake_en) {
                if (enable_irq_wake(s3c_rtc_alarmno) == 0)
                        wake_en = true;
                else
-                       dev_err(&pdev->dev, "enable_irq_wake failed\n");
+                       dev_err(dev, "enable_irq_wake failed\n");
        }
        clk_disable(rtc_clk);
 
        return 0;
 }
 
-static int s3c_rtc_resume(struct platform_device *pdev)
+static int s3c_rtc_resume(struct device *dev)
 {
+       struct platform_device *pdev = to_platform_device(dev);
        unsigned int tmp;
 
        clk_enable(rtc_clk);
@@ -619,7 +621,7 @@ static int s3c_rtc_resume(struct platform_device *pdev)
                writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
        }
 
-       if (device_may_wakeup(&pdev->dev) && wake_en) {
+       if (device_may_wakeup(dev) && wake_en) {
                disable_irq_wake(s3c_rtc_alarmno);
                wake_en = false;
        }
@@ -627,11 +629,10 @@ static int s3c_rtc_resume(struct platform_device *pdev)
 
        return 0;
 }
-#else
-#define s3c_rtc_suspend NULL
-#define s3c_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
+
 #ifdef CONFIG_OF
 static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
        [TYPE_S3C2410] = { TYPE_S3C2410 },
@@ -681,12 +682,11 @@ MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
 static struct platform_driver s3c_rtc_driver = {
        .probe          = s3c_rtc_probe,
        .remove         = s3c_rtc_remove,
-       .suspend        = s3c_rtc_suspend,
-       .resume         = s3c_rtc_resume,
        .id_table       = s3c_rtc_driver_ids,
        .driver         = {
                .name   = "s3c-rtc",
                .owner  = THIS_MODULE,
+               .pm     = &s3c_rtc_pm_ops,
                .of_match_table = of_match_ptr(s3c_rtc_dt_match),
        },
 };