linux-kernel - Re: [PATCH 2/2] ARM: dts: mvebu: split SolidRun CuBox into variants

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Date:	Wed, 28 May 2014 00:37:36 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Heiko Stübner <heiko@...ech.de>,
	linux-arm-kernel@...ts.infradead.org
CC:	Jason Cooper <jason@...edaemon.net>,
	Mark Rutland <mark.rutland@....com>,
	Andrew Lunn <andrew@...n.ch>,
	Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Gregory Clement <gregory.clement@...e-electrons.com>
Subject: Re: [PATCH 2/2] ARM: dts: mvebu: split SolidRun CuBox into variants

On 05/28/2014 12:24 AM, Heiko Stübner wrote:
> Am Dienstag, 27. Mai 2014, 23:50:29 schrieb Sebastian Hesselbarth:
>> On 05/27/2014 11:35 PM, Jason Cooper wrote:
>>> On Tue, May 27, 2014 at 07:28:09PM +0200, Sebastian Hesselbarth wrote:
>>>> On 05/27/2014 06:11 PM, Jason Cooper wrote:
>>>>> On Mon, May 26, 2014 at 11:33:29PM +0200, Sebastian Hesselbarth wrote:
>>> info.  It may be useful here, but I'd like to hear from the DT
>>> maintainers how they want it used.  eg: most popular first, like you
>>> have it, or oldest first
>>>
>>> dove-cubox-es.dts
>>> +--> dove-cubox.dts
>>
>> In the cubox case, this is not possible. ES has a misrouted
>> card-detection for sdhci, this requires an additional property.
>> There is no way to remove a property once it is written down in
>> any of the files included. But you know about that already.
> 
> dtc knows "/delete-property/" [0], but I may be missing something here.
> 
> [0] https://lists.ozlabs.org/pipermail/devicetree-discuss/2012-August/018169.html

Heiko,

thanks for the link, I must have completely ignored it! Now that I
think about it, it may be very useful for kirkwood-98xsomething.dtsi
that is a special Kirkwood with a bunch of IP removed (but only some
boards). That way we could consolidate the common SoCs and use
/delete-node/ for the special case SoC.

Anyway, for CuBox ES, I either prefer the v2 approach just send - or
have a cubox-common.dtsi with two board dts for 1G and ES each. We use
this structure a lot and Andrew showed it even works for up to 5 or 10
different variants.

Sebastian

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