rtc: rtc-s3c: Add BCD register initialization codes

RTC needs to be initialized when BCD registers have invalid value.

Signed-off-by: Taekgyun Ko <taeggyun.ko@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 204001769ebc..a0d3ec89d412 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -458,6 +458,7 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
 {
         struct rtc_device *rtc;
         struct resource *res;
+        unsigned int tmp, i;
         int ret;
 
         pr_debug("%s: probe=%p\n", __func__, pdev);
@@ -536,6 +537,15 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev)
 
         s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data;
 
+        /* Check RTC Time */
+
+        for (i = S3C2410_RTCSEC; i <= S3C2410_RTCYEAR; i += 0x4) {
+                tmp = readb(s3c_rtc_base + i);
+
+                if ((tmp & 0xf) > 0x9 || ((tmp >> 4) & 0xf) > 0x9)
+                        writeb(0, s3c_rtc_base + i);
+        }
+
         if (s3c_rtc_cpu_type == TYPE_S3C64XX)
                 rtc->max_user_freq = 32768;
         else