From patchwork Wed Jul 21 08:57:46 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3/3] rtc: rtc-s3c: Add BCD register initialization codes Date: Tue, 20 Jul 2010 22:57:46 -0000 From: Kukjin Kim X-Patchwork-Id: 59418 Message-Id: <1279702666-13021-4-git-send-email-kgene.kim@samsung.com> To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, rtc-linux@googlegroups.com Cc: ben-linux@fluff.org, p_gortmaker@yahoo.com, a.zummo@towertech.it, Taekgyun Ko , Kukjin Kim From: Taekgyun Ko RTC needs to be initialized when BCD registers have invalid value. Signed-off-by: Taekgyun Ko Signed-off-by: Kukjin Kim --- drivers/rtc/rtc-s3c.c | 14 ++++++++++++-- 1 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index 2040017..e96e109 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -536,10 +536,20 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) s3c_rtc_cpu_type = platform_get_device_id(pdev)->driver_data; - if (s3c_rtc_cpu_type == TYPE_S3C64XX) + if (s3c_rtc_cpu_type == TYPE_S3C64XX) { rtc->max_user_freq = 32768; - else + + /* 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); + } + } else { rtc->max_user_freq = 128; + } platform_set_drvdata(pdev, rtc);