linux-kernel - Re: [PATCH 3/4] ARM: dts: Include exynos5420-pinctrl after the nodes were defined

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Date:	Wed, 08 Jul 2015 17:25:05 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier@....samsung.com>,
	Kukjin Kim <kgene@...nel.org>
Cc:	devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] ARM: dts: Include exynos5420-pinctrl after the nodes
 were defined

On 08.07.2015 14:36, Javier Martinez Canillas wrote:
> The dtc compiler combines all the defined nodes that have the same path
> so a device node definition can be in one file and later be extended in
> another one.
> 
> That's the case of the Exynos5420 pinctrl device nodes that are defined
> in the exynos5420.dtsi file and extended in exynos5420-pinctrl.dtsi.
> 
> But since the exynos5420.dtsi file includes the exynos5420-pinctrl.dtsi
> before the pinctrl device nodes are actually defined, the definition of
> the pinctrl device nodes happens in exynos5420-pinctrl.dtsi and are
> extended in exynos5420.dtsi.
> 
> That is the opposite of the original intention so even when there is no
> difference in practice, the exynos5420-pinctrl.dtsi include should be
> moved at the end of the exynos5420.dtsi file after the pinctrl device
> nodes have been already defined.
> 
> This will also allow to later change the exynos5420-pinctrl.dtsi file
> to use labels instead of full paths to extend the pinctrl nodes. Since
> keeping the include at the top, would cause a dtc build error due the
> pinctrl labels not being defined yet.
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> ---
> 
>  arch/arm/boot/dts/exynos5420.dtsi | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)


Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

Best regards,
Krzysztof

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