linux-kernel - Re: [PATCH] ARM: dts: n900: Include adp1653 device

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Date:	Wed, 27 Jan 2016 11:02:37 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Tony Lindgren <tony@...mide.com>, Pavel Machek <pavel@....cz>,
	Benoît Cousson <bcousson@...libre.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, linux-omap@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: n900: Include adp1653 device

On Thursday 21 January 2016 16:54:08 Russell King - ARM Linux wrote:
> On Thu, Jan 21, 2016 at 08:38:57AM -0800, Tony Lindgren wrote:
> > * Pavel Machek <pavel@....cz> [160121 02:19]:
> > > On Thu 2016-01-21 09:29:10, Russell King - ARM Linux wrote:
> > > > The merge window is open, which is when development code that was merged
> > > > in good time prior to the merge window is sent upstream to Linus.  Linux
> > > > maintainers may choose not to merge new code into their tree to avoid
> > > > disrupting the utility of linux-next until the merge window has
> > > > closed.
> > > 
> > > Support for new hardware is normally allowed after -rc1.
> > 
> > Yeah most maintainers avoid looking at new code until -rc1. Or until
> > regresssions are out of the way. So patience please. Fixes are
> > welcome any time though.
> 
> Indeed.  However, unlike Pavel's comment, many maintainers choose not
> to merge code for new hardware until the merge window - it's very rare
> that support for new hardware is merged during the -rc phase.
> 
> If it were otherwise, I would've been able to get the Hummingboard 2
> DTS patches in, or the etnaviv team would've been able to get the
> Etnaviv GPU DRM driver in during the 4.4-rc cycle, or the Dove PMU
> driver, or... etc.
> 
> Practically, new code waits for merge windows, because no one wants
> to de-stabilise the progression of the -rc series with new code, and
> Linus wants to see -rc merges fairly quiet and be mostly bug fixes
> so he can feel good about a final release around -rc6 to -rc7 time.
> 

In my opinion this patch is not support for new hardware. It just add
missing DT definition for one specific board for HW which was added to
linux kernel in v4.2-rc1 version. For me it looks like that needed DT
definition was forgotten...

-- 
Pali Rohár
pali.rohar@...il.com