linux-kernel - Re: [PATCH v5 2/2] arm: pxa27x: support for ICP DAS LP-8x4x w/ DT

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Date:	Sat, 19 Dec 2015 13:27:07 +0100
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Sergei Ianovich <ynvich@...il.com>, linux-kernel@...r.kernel.org,
	Daniel Mack <zonque@...il.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>,
	Russell King <linux@....linux.org.uk>,
	Thierry Reding <treding@...dia.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Arnaud Ebalard <arno@...isbad.org>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	"open list\:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@...r.kernel.org>,
	"moderated list\:ARM PORT" <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 2/2] arm: pxa27x: support for ICP DAS LP-8x4x w/ DT

Arnd Bergmann <arnd@...db.de> writes:

> I would like those drivers to be enabled in some defconfig, so we get
> compile-time coverage, but we generally stopped having one-config-per-board
> files.
>
> Maybe we can have a pxa_defconfig file that enables lots of boards
> and then we remove the individual configs? We don't have to remove
> them all at once, but it would make me very happy if we could at
> least kill off some of the ones that are not used regularly.

I'll take that part, the pxa_defconfig which covers all pxa boards in
arch/arm/mach-pxa. I have a prototype, which of course doesn't boot on any of my
pxa platforms (breaks in the very early bootstrap code I think, DEBUG_LL is the
next stage).

Actually I've not even looked if a single kernel covering pxa2xx and pxa3xx is
possible (since recently clock handling was a blocker).

Once I have something that at least shows me a sign of life, I'll submit an RFC
patch. This work will be orthogonal to Sergei's one, as it is aimed at having
one defconfig compiling all mach-pxa/*.c files and the drivers referenced by
them. This won't allow removing defconfig files until I have a good idea why my
boards are not booting (lubbock, mainstone, mioa701, zylonite, cm-x300).

Cheers.

-- 
Robert
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