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rtc: rtc-s3c: Add BCD register initialization codes

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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>
This commit is contained in:
Taekgyun Ko 2010-07-29 13:00:42 +09:00 committed by Kukjin Kim
parent 2f3478f657
commit 051fe54e9f
1 changed files with 10 additions and 0 deletions
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10
drivers/rtc/rtc-s3c.c
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@ -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