linux-kernel - Re: [PATCH 2/3] rtc: ftrtc010: handle dates after 2106

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Date:   Thu, 7 Jun 2018 16:43:45 +0200 (CEST)
From:   Hans Ulli Kroll <ulli.kroll@...glemail.com>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
cc:     linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] rtc: ftrtc010: handle dates after 2106

On Mon, 4 Jun 2018, Alexandre Belloni wrote:

> Use correct types for offset and time and use
> rtc_time64_to_tm/rtc_tm_to_time64 to handle dates after 2106 properly.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
>  drivers/rtc/rtc-ftrtc010.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-ftrtc010.c b/drivers/rtc/rtc-ftrtc010.c
> index 165d0b62db00..2cdc78ffeb17 100644
> --- a/drivers/rtc/rtc-ftrtc010.c
> +++ b/drivers/rtc/rtc-ftrtc010.c
> @@ -73,8 +73,8 @@ static int ftrtc010_rtc_read_time(struct device *dev, struct rtc_time *tm)
>  {
>  	struct ftrtc010_rtc *rtc = dev_get_drvdata(dev);
>  
> -	unsigned int  days, hour, min, sec;
> -	unsigned long offset, time;
> +	u32 days, hour, min, sec, offset;
> +	timeu64_t time;
>  
>  	sec  = readl(rtc->rtc_base + FTRTC010_RTC_SECOND);
>  	min  = readl(rtc->rtc_base + FTRTC010_RTC_MINUTE);
> @@ -84,7 +84,7 @@ static int ftrtc010_rtc_read_time(struct device *dev, struct rtc_time *tm)
>  
>  	time = offset + days * 86400 + hour * 3600 + min * 60 + sec;
>  
> -	rtc_time_to_tm(time, tm);
> +	rtc_time64_to_tm(time, tm);
>  
>  	return 0;
>  }
> @@ -92,13 +92,13 @@ static int ftrtc010_rtc_read_time(struct device *dev, struct rtc_time *tm)
>  static int ftrtc010_rtc_set_time(struct device *dev, struct rtc_time *tm)
>  {
>  	struct ftrtc010_rtc *rtc = dev_get_drvdata(dev);
> -	unsigned int sec, min, hour, day;
> -	unsigned long offset, time;
> +	u32 sec, min, hour, day, offset;
> +	timeu64_t time;
>  
>  	if (tm->tm_year >= 2148)	/* EPOCH Year + 179 */
>  		return -EINVAL;
>  
> -	rtc_tm_to_time(tm, &time);
> +	time = rtc_tm_to_time64(tm);
>  
>  	sec = readl(rtc->rtc_base + FTRTC010_RTC_SECOND);
>  	min = readl(rtc->rtc_base + FTRTC010_RTC_MINUTE);
> -- 
> 2.17.1
> 
> 

Acked-by: Hans Ulli Kroll <ulli.kroll@...glemail.com>