linux-kernel - Re: [PATCH 2/4] rtc: s3c: Add time range

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Date:   Tue, 19 Oct 2021 18:20:29 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Sam Protsenko <semen.protsenko@...aro.org>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-rtc@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] rtc: s3c: Add time range

On 19/10/2021 16:17:22+0300, Sam Protsenko wrote:
> This RTC driver only accepts dates from 2000 to 2099 year. It starts
> counting from 2000 to avoid Y2K problem, and S3C RTC only supports 100
> years range. Provide this info to RTC framework.
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> ---
>  drivers/rtc/rtc-s3c.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
> index 10e591794276..d9994efd70ef 100644
> --- a/drivers/rtc/rtc-s3c.c
> +++ b/drivers/rtc/rtc-s3c.c
> @@ -454,6 +454,8 @@ static int s3c_rtc_probe(struct platform_device *pdev)
>  	}
>  
>  	info->rtc->ops = &s3c_rtcops;
> +	info->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
> +	info->rtc->range_max = RTC_TIMESTAMP_END_2099;
>  

This change is missing the if (year < 0 || year >= 100)  removal in
s3c_rtc_settime()

>  	ret = devm_rtc_register_device(info->rtc);
>  	if (ret)
> -- 
> 2.30.2
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com