linux-kernel - Re: [PATCH V6 3/3] ARM: dts: Add pcie controller node for Samsung EXYNOS5440 SoC

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Message-id: <1490597.TZb2cDc7ca@amdc1227>
Date:	Thu, 20 Jun 2013 13:42:43 +0200
From:	Tomasz Figa <t.figa@...sung.com>
To:	Jingoo Han <jg1.han@...sung.com>, 'Arnd Bergmann' <arnd@...db.de>
Cc:	'Tomasz Figa' <tomasz.figa@...il.com>,
	'Kukjin Kim' <kgene.kim@...sung.com>,
	'Bjorn Helgaas' <bhelgaas@...gle.com>,
	linux-samsung-soc@...r.kernel.org, linux-pci@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	'Grant Likely' <grant.likely@...retlab.ca>,
	'Andrew Murray' <andrew.murray@....com>,
	'Thomas Petazzoni' <thomas.petazzoni@...e-electrons.com>,
	'Thierry Reding' <thierry.reding@...onic-design.de>,
	'Jason Gunthorpe' <jgunthorpe@...idianresearch.com>,
	'Surendranath Gurivireddy Balla' <suren.reddy@...sung.com>,
	'Siva Reddy Kallam' <siva.kallam@...sung.com>,
	'Thomas Abraham' <thomas.abraham@...aro.org>
Subject: Re: [PATCH V6 3/3] ARM: dts: Add pcie controller node for Samsung
 EXYNOS5440 SoC

On Thursday 20 of June 2013 20:04:47 Jingoo Han wrote:
> On Thursday, June 20, 2013 7:17 PM, Arnd Bergmann wrote:
> > On Thursday 20 June 2013, Jingoo Han wrote:
> > > 2. patch adding label to the pinctrl node (which is a prerequisite)
> > > and
> > > 
> > >     board-specific properties of PCIe nodes.
> > >    
> > >    [PATCH] ARM: dts: Add pcie controller node for exynos5440-ssdk5440
> > > 
> > > arch/arm/boot/dts/exynos5440-ssdk5440.dts
> > > +
> > > +       pcie0@...000 {
> > > +               reset-gpio = <&pin_ctrl 5 0>;
> > > +       };
> > > +
> > > +       pcie1@...000 {
> > > +               reset-gpio = <&pin_ctrl 22 0>;
> > > +       };
> > > 
> > > arch/arm/boot/dts/exynos5440.dtsi
> > > -       pinctrl {
> > > +       pin_ctrl: pinctrl {
> > 
> > Note that you don't really have to use a label, you can also refer
> > to the pinctrl node by its full path, which is just "/pinctrl"
> > or "/pinctrl@...00".

Sure, you can, but this is ugly.

> 
> I see.
> 
> But, I have a question.
> Using phandle has been the usual way to referring to a node.
> Why do you want to do it differently?

Path is translated to a phandle as well.

--
Best regards,
Tomasz

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