rtc: ds1302 rtc support

[linux-2.6-omap-h63xx.git] / drivers / rtc / rtc-s3c.c

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 9a79a24a74874189deab5885af6ea98c6de50746..86766f1f24965f07c7b2efce8a8d793e1e06445d 100644 (file)
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -20,6 +20,7 @@
 #include <linux/rtc.h>
 #include <linux/bcd.h>
 #include <linux/clk.h>
+#include <linux/log2.h>
 
 #include <asm/hardware.h>
 #include <asm/uaccess.h>
@@ -29,7 +30,7 @@
 
 #include <asm/mach/time.h>
 
-#include <asm/arch/regs-rtc.h>
+#include <asm/plat-s3c/regs-rtc.h>
 
 /* I have yet to find an S3C implementation with more than one
  * of these rtc blocks in */
@@ -50,7 +51,7 @@ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
 {
        struct rtc_device *rdev = id;
 
-       rtc_update_irq(&rdev->class_dev, 1, RTC_AF | RTC_IRQF);
+       rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
        return IRQ_HANDLED;
 }
 
@@ -58,7 +59,7 @@ static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
 {
        struct rtc_device *rdev = id;
 
-       rtc_update_irq(&rdev->class_dev, tick_count++, RTC_PF | RTC_IRQF);
+       rtc_update_irq(rdev, tick_count++, RTC_PF | RTC_IRQF);
        return IRQ_HANDLED;
 }
 
@@ -309,9 +310,7 @@ static int s3c_rtc_ioctl(struct device *dev,
                break;
 
        case RTC_IRQP_SET:
-               /* check for power of 2 */
-
-               if ((arg & (arg-1)) != 0 || arg < 1) {
+               if (!is_power_of_2(arg)) {
                        ret = -EINVAL;
                        goto exit;
                }
@@ -542,43 +541,19 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 
 /* RTC Power management control */
 
-static struct timespec s3c_rtc_delta;
-
 static int ticnt_save;
 
 static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 {
-       struct rtc_time tm;
-       struct timespec time;
-
-       time.tv_nsec = 0;
-
        /* save TICNT for anyone using periodic interrupts */
-
        ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
-
-       /* calculate time delta for suspend */
-
-       s3c_rtc_gettime(&pdev->dev, &tm);
-       rtc_tm_to_time(&tm, &time.tv_sec);
-       save_time_delta(&s3c_rtc_delta, &time);
        s3c_rtc_enable(pdev, 0);
-
        return 0;
 }
 
 static int s3c_rtc_resume(struct platform_device *pdev)
 {
-       struct rtc_time tm;
-       struct timespec time;
-
-       time.tv_nsec = 0;
-
        s3c_rtc_enable(pdev, 1);
-       s3c_rtc_gettime(&pdev->dev, &tm);
-       rtc_tm_to_time(&tm, &time.tv_sec);
-       restore_time_delta(&s3c_rtc_delta, &time);
-
        writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
        return 0;
 }