linux-kernel - Re: [PATCH v3] of: replace Asahi Kasei Corp venter prefix

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Message-ID: <2984171.bo9yu8oQT6@wuerfel>
Date:	Fri, 14 Nov 2014 10:16:18 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Alexandre Courbot <acourbot@...dia.com>
Cc:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	Mark Brown <broonie@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Simon Horman <horms@...ge.net.au>,
	Joe Perches <joe@...ches.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Kuninori Morimoto <kuninori.morimoto.gx@...il.com>,
	Olof Johansson <olof@...om.net>,
	Stephen Warren <swarren@...dotorg.org>,
	Rob Herring <robh@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	ALSA Development Mailing List <alsa-devel@...a-project.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	Magnus <magnus.damm@...il.com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH v3] of: replace Asahi Kasei Corp venter prefix

On Friday 14 November 2014 17:38:58 Alexandre Courbot wrote:
> > diff --git a/arch/arm/boot/dts/tegra20-seaboard.dts b/arch/arm/boot/dts/tegra20-seaboard.dts
> > index a1d4bf9..7f5cf80 100644
> > --- a/arch/arm/boot/dts/tegra20-seaboard.dts
> > +++ b/arch/arm/boot/dts/tegra20-seaboard.dts
> > @@ -405,7 +405,7 @@
> >               clock-frequency = <400000>;
> >
> >               magnetometer@c {
> > -                     compatible = "ak,ak8975";
> > +                     compatible = "asahi-kasei,ak8975";
> 
> Mmm. So does this mean this device was never probed because the driver 
> did not recognize its compatible property? I cannot find "ak,ak8975" 
> anywhere else in the kernel.
> 

No, the i2c bus behaves in a special way by matching the "ak8975"
i2c driver name with any "*,ak8975" DT compatible string. Both
of the above will work with existing kernels.

	Arnd
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