linux-kernel - Re: [PATCH 2/4] rtc: digicolor: set range

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Message-ID: <877ebbu3lz.fsf@tarshish>
Date:   Tue, 30 Apr 2019 14:36:24 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/4] rtc: digicolor: set range

Hi Alexandre,

On Tue, Apr 30 2019, Alexandre Belloni wrote:

> While the range of REFERENCE + TIME is actually 33 bits, the counter
> itself (TIME) is a 32-bits seconds counter.
>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
>  drivers/rtc/rtc-digicolor.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/rtc/rtc-digicolor.c b/drivers/rtc/rtc-digicolor.c
> index 5bb14c56bc9a..e6e16aaac254 100644
> --- a/drivers/rtc/rtc-digicolor.c
> +++ b/drivers/rtc/rtc-digicolor.c
> @@ -206,6 +206,7 @@ static int __init dc_rtc_probe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, rtc);
>  
>  	rtc->rtc_dev->ops = &dc_rtc_ops;
> +	rtc->rtc_dev->range_max = U32_MAX;

Where can I find documentation on the meaning and usage of the range_max
value? I could not find anything in the kernel source.

baruch

>  
>  	return rtc_register_device(rtc->rtc_dev);
>  }


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