[rtc-linux] [PATCH 3/3] rtc: rtc-s3c: Add BCD register initialization codes

[Wan ZongShun]

2010/7/21 Kukjin Kim <kgene.kim at samsung.com>:
> From: Taekgyun Ko <taeggyun.ko at samsung.com>
>
> RTC needs to be initialized when BCD registers have invalid value.

Do you mean that the hardware register does not have default value?
Any results if no initialized value here?

>
> Signed-off-by: Taekgyun Ko <taeggyun.ko at samsung.com>
> Signed-off-by: Kukjin Kim <kgene.kim at samsung.com>
> ---
>  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);
>
> --
> 1.6.2.5
>
> --
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