diff options
| author | Changhwan Youn <chaos.youn@samsung.com> | 2010-10-27 15:33:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:03:06 -0700 |
| commit | e1df962e6cdc431acb6a8da409b6a7d89c4f782e (patch) | |
| tree | d56e3cab40e38d99cb671d93b982feb57657355d /drivers/rtc | |
| parent | 30ffc40cf52cd68782b50cb699b5eca076ca23ab (diff) | |
rtc: rtc-s3c: fix RTC initialization method
Change RTC initialization method in probe(). The 'rtc_valid_tm(tm)' can
check whether RTC BCD is valid or not. And change the method of checking
because the previous method cannot validate RTC BCD registers properly.
Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-s3c.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index ead217b1857a..d0498a223f40 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -456,8 +456,8 @@ static int __devexit s3c_rtc_remove(struct platform_device *dev) static int __devinit s3c_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; + struct rtc_time rtc_tm; struct resource *res; - unsigned int tmp, i; int ret; pr_debug("%s: probe=%p\n", __func__, pdev); @@ -538,11 +538,19 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) /* Check RTC Time */ - for (i = S3C2410_RTCSEC; i <= S3C2410_RTCYEAR; i += 0x4) { - tmp = readb(s3c_rtc_base + i); + s3c_rtc_gettime(NULL, &rtc_tm); - if ((tmp & 0xf) > 0x9 || ((tmp >> 4) & 0xf) > 0x9) - writeb(0, s3c_rtc_base + i); + if (rtc_valid_tm(&rtc_tm)) { + rtc_tm.tm_year = 100; + rtc_tm.tm_mon = 0; + rtc_tm.tm_mday = 1; + rtc_tm.tm_hour = 0; + rtc_tm.tm_min = 0; + rtc_tm.tm_sec = 0; + + s3c_rtc_settime(NULL, &rtc_tm); + + dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n"); } if (s3c_rtc_cpu_type == TYPE_S3C64XX) |