linux-kernel - Re: [Ksummit-2013-discuss] DT bindings as ABI [was: Do we have people interested in device tree janitoring / cleanup?]

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Message-ID: <520AE238.4030304@roeck-us.net>
Date:	Tue, 13 Aug 2013 18:49:44 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	David Gibson <david@...son.dropbear.id.au>,
	Mark Rutland <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"ksummit-2013-discuss@...ts.linuxfoundation.org" 
	<ksummit-2013-discuss@...ts.linuxfoundation.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Ian Campbell <ian.campbell@...rix.com>,
	Pawel Moll <Pawel.Moll@....com>,
	Richard Cochran <richardcochran@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	"jonsmirl@...il.com" <jonsmirl@...il.com>,
	Domenico Andreoli <cavokz@...il.com>, mbizon@...ebox.fr,
	Dave P Martin <Dave.Martin@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [Ksummit-2013-discuss] DT bindings as ABI [was: Do we have people
 interested in device tree janitoring / cleanup?]

On 08/13/2013 04:32 PM, H. Peter Anvin wrote:
> On 08/01/2013 08:50 PM, David Gibson wrote:
>> On Wed, Jul 31, 2013 at 05:26:47PM -0400, jonsmirl@...il.com
>> wrote:
>>> On Wed, Jul 31, 2013 at 4:48 PM, Russell King - ARM Linux
>>> <linux@....linux.org.uk> wrote:
>>>> On Wed, Jul 31, 2013 at 04:37:36PM -0400, jonsmirl@...il.com
>>> wrote:
>> [snip]
>>> Alternatively you may be of the belief that it is impossible to
>>> get rid of the board specific code. But x86 doesn't have any of
>>> it, why should ARM?
>>
>> Sure x86 has board specific code.  It's just that x86 basically
>> only has one board - PC.
>>
>
> That is one aspect (hardware standardization)... but it is more to it
> than that.
>
I have to deal with lots of embedded / non-PC x86 based systems. Worst one
I encountered so far was a board where the VGA memory space was re-used
for an eeprom. The upcoming next generation hardware I'll have to support
is so far off-standard that I'll probably have to define a new platform
type (similar to OLPC or CE4100).

No, it is not all PC. Not anymore. Intel has started to sell into
the embedded space, where PC compatibility is not a requirement.

Guenter

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