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authorTaekgyun Ko <taeggyun.ko@samsung.com>2010-07-29 13:00:42 +0900
committerKukjin Kim <kgene.kim@samsung.com>2010-08-05 18:32:51 +0900
commit051fe54e9f8c568dc9cd288b630d436ee93afe35 (patch)
tree43cba5cae8a90661f56ac4f8466cd9f7baca73fb /drivers/rtc
parent2f3478f6579b3f8d4579b6d49d7a8e9376c48fc2 (diff)
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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>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-s3c.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 204001769eb..a0d3ec89d41 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