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Date:   Thu, 17 Aug 2023 21:51:17 +0200
From:   Alexandre Belloni <alexandre.belloni@bootlin.com>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Alessandro Zummo <a.zummo@towertech.it>,
        Benson Leung <bleung@chromium.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        John Stultz <jstultz@google.com>,
        Stephen Boyd <sboyd@kernel.org>, linux-rtc@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Brian Norris <briannorris@chromium.org>
Subject: Re: [PATCH 0/7] rtc: Add support for limited alarm timer offsets
Message-ID: <202308171951177626a54c@mail.local>
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On 16/08/2023 12:12:14-0700, Guenter Roeck wrote:
> On Wed, Aug 16, 2023 at 06:14:35PM +0200, Alexandre Belloni wrote:
> > On 16/08/2023 08:50:12-0700, Guenter Roeck wrote:
> > > > I'm fine with the series, however, this doesn't solve the issue for RTCs
> > > > that have an absolute limit on the alarm (as opposed to an offset to the
> > > > current time/date).
> > > > 
> > > 
> > > I thought that is checked by rtc_valid_range() in rtc_set_alarm().
> > > Am I missing something ? Of course that assumes that the absolute
> > > maximum alarm timeout matches range_max, but I didn't find any
> > > drivers where that would not be the case.
> > > 
> > 
> > There are RTCs where this is not the case. When this is far away in the
> > future enough, the usual solution is to clip range_max which works but
> > is not really great intellectually.
> > 
> Do you have an example, by any chance ?
> 

I'm sorry, I've been looking and I couldn't find it anymore. Don't
bother with this for now.

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