linux-kernel - Re: [PATCH 0/2 v3] Add pl031 RTC support for Hi6220

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Message-ID: <3989688.6Bh7v9havA@wuerfel>
Date:	Wed, 06 Jul 2016 09:38:59 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Olof Johansson <olof@...om.net>,
	lkml <linux-kernel@...r.kernel.org>,
	"arm@...nel.org" <arm@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>, Wei Xu <xuwei5@...ilicon.com>,
	Guodong Xu <guodong.xu@...aro.org>,
	Zhangfei Gao <zhangfei.gao@...aro.org>
Subject: Re: [PATCH 0/2 v3] Add pl031 RTC support for Hi6220

On Wednesday, July 6, 2016 12:20:15 AM CEST John Stultz wrote:
> On Wed, Jul 6, 2016 at 12:04 AM, Olof Johansson <olof@...om.net> wrote:
> > On Tue, Jul 5, 2016 at 11:55 PM, John Stultz <john.stultz@...aro.org> wrote:
> >> On Tue, Jul 5, 2016 at 10:22 PM, Olof Johansson <olof@...om.net> wrote:
> >>> On Wed, Jun 29, 2016 at 05:48:43PM -0700, John Stultz wrote:
> >>>> This patchset enables the pl031 RTC on the Hi6220 SoC.
> >>>>
> >>>> I'd like to submit it to be merged.
> >>>>
> >>>> Wei has acked the second patch (modulo a whitespace fix which
> >>>> I've included in this v3), so it seems like both could go
> >>>> through the clk tree.
> >>>>
> >>>> But Wei also seemed open to pulling in a clk tree branch
> >>>> as it goes through arm-soc.
> >>>>
> >>>> Michael/Stephen: If there's no other objections, could you
> >>>> queue the first patch and make it avilable via the branch for
> >>>> Wei, or just take both patches?
> >>>
> >>> I happen to dread these kind of patchsets these days. There's added
> >>> dependencies across trees just because a defined name for the clock
> >>> number is added to a header file.
> >>>
> >>> I much prefer to use numerical clocks for one release, and then once
> >>> everything is in, switch over to the defines in the DTS.
> >>>
> >>> That way there are no dependencies, no need to setup a shared branch
> >>> for a simple 3-line patch, etc.
> >>>
> >>> So, mind respinning the DTS piece?
> >>
> >> Huh..
> >
> > Sorry if it appeared random, I've complained about it for a while to
> > submaintainers. 
> 
> No.. I get it, the cross-maintainer shared branch is complex enough to
> want to avoid. I figured it would be easier to just take a maintainer
> acked patch in via the clk tree, but its not my tree, so I'll leave it
> to you maintainers to resolve.

The question this raises is why that clock was missed the first time
around. I'd suggest whoever owns the clock driver can go through the
documentation again and look for others that may have been missed,
then send a patch to the driver to add *all* the missing ones for the
merge window, and one release later we add the driver depending on
previously unknown clocks.

	Arnd