From: Taekgyun Ko <taeggyun.ko@xxxxxxxxxxx>
RTC needs to be initialized when BCD registers have invalid value.
Signed-off-by: Taekgyun Ko <taeggyun.ko@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Cc: Ben Dooks <ben-linux@xxxxxxxxx>
---
Hi, Alessandro Zummo
Just moved the routine to support all Samsung SoCs' RTC.
Is still your ack valid?
Changes since v2:
Moved chekcing BCD registers to support all Samsung SoCs as per Ben's comments.
drivers/rtc/rtc-s3c.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 2040017..a0d3ec8 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
--
1.6.2.5
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