linux-kernel - Re: [RFC PATCH 2/4] ARM: dts: Add SPI flash node for Peach boards

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Date:	Wed, 20 May 2015 12:17:57 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Mark Brown <broonie@...nel.org>
CC:	Kukjin Kim <kgene@...nel.org>, Olof Johansson <olof@...om.net>,
	Doug Anderson <dianders@...omium.org>,
	David Hendricks <dhendrix@...gle.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Simon Glass <sjg@...omium.org>
Subject: Re: [RFC PATCH 2/4] ARM: dts: Add SPI flash node for Peach boards

Hello Krzysztof,

On 05/20/2015 05:37 AM, Krzysztof Kozlowski wrote:
> On 19.05.2015 22:34, Javier Martinez Canillas wrote:
>> From: Simon Glass <sjg@...omium.org>
>> 
>> Peach Pit and Pi machines have a SPI flash memory that is used to
>> store firmware and different system parameters and data.
>> 
>> Add information about the SPI flash chip so that user-space tools
>> can access it.
>> 
>> Signed-off-by: Simon Glass <sjg@...omium.org>
>> Reviewed-by: Doug Anderson <dianders@...omium.org>
>> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> 
> Acked-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> 
> I assume this can go through samsung-soc tree (after documenting new
> compatible)?
>

Yes, I mentioned in the cover letter that patch #1 should go through
the spi tree and #2-4 through the linux-samsung tree. I can split in
two series once I post as proper patches to make it more clear.
 
> The exynos5800-peach-pi.dts and exynos5420-peach-pit.dts have a lot of
> common nodes. I wonder if there is a common part which could have its
> own dtsi? Like exynos4412-odroid-common.dtsi?
>

We discussed in the past about having a common .dtsi [0]. I'm not a
huge fan of a common .dtsi and I prefer to instead split common dts
fragments in a .dtsi that can be included in different dts.

That also better reflects what happens at the hw level IMHO since a
board may reuse a IP block. Doug Anderson seems to agree with me [1].
 
> Best regards,
> Krzysztof
>

Best regards,
Javier

[0]: https://lkml.org/lkml/2014/6/26/271
[1]: https://lkml.org/lkml/2014/6/26/555
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