netdev - Re: [PATCH 00/51] rtc: stop using rtc deprecated functions

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Date:   Wed, 21 Jun 2017 11:14:34 +0200
From:   Benjamin Gaignard <benjamin.gaignard@...aro.org>
To:     Pavel Machek <pavel@....cz>
Cc:     Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Steve Twiss <stwiss.opensource@...semi.com>,
        "linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
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        <adi-buildroot-devel@...ts.sourceforge.net>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Ingo Molnar <mingo@...hat.com>,
        Jason Cooper <jason@...edaemon.net>,
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        <linux-arm-kernel@...ts.infradead.org>,
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        Linus Walleij <linus.walleij@...aro.org>,
        Michael Chan <michael.chan@...adcom.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
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        "patches@...nsource.wolfsonmicro.com" 
        <patches@...nsource.wolfsonmicro.com>,
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        Len Brown <len.brown@...el.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 00/51] rtc: stop using rtc deprecated functions

2017-06-21 0:08 GMT+02:00 Pavel Machek <pavel@....cz>:
> Hi!
>
>> >> > This is it.
>> >> > https://patchwork.kernel.org/patch/6219401/
>> >>
>> >> Thanks.
>> >>
>> >> Yes, that's argument against changing rtc _drivers_ for hardware that
>> >> can not do better than 32bit. For generic code (such as 44/51 sysfs,
>> >> 51/51 suspend test), the change still makes sense.
>>
>> What I had in mind when writing those patches was to remove the limitations
>> coming from those functions usage, even more since they been marked has
>> deprecated.
>>
>> I agree that will change nothing of hardware limitation but at least
>> the limit will
>> not come from the framework.
>
>> > Yes, we agree on that but I won't cherry pick working patches from a 51
>> > patches series.
>
> Well, it would be actually nice for you to do the cherry
> picking. That's something maintainers do, because it is hard for
> contributors to guess maintainer's taste.
>
> Anyway, it looks like someone should go through all the RTC drivers,
> and document their limitations of each driver (date in future when
> hardware ceases to be useful). If Benjamin has time to do that, I
> guess that removes all the objections to the series.

Without the datasheet I can check in driver code what they do in read/set
time functions to understand their limitations. All drivers using BCD
like system
or spliting day and time should be fixed. I can do a subset of my patches
including those driver + the acked ones.

Alexandre does that sound reasonable for you ?


> Regards,
>                                                                         Pavel
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html