linux-kernel - Re: [RFC 4/4] ARM: shmobile: r8a7790: adapt DTS for I2C slave support

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Date:	Fri, 12 Sep 2014 12:26:08 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Marc Dietrich <marvin24@....de>,
	Linux I2C <linux-i2c@...r.kernel.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Jean Delvare <jdelvare@...e.de>,
	Magnus Damm <magnus.damm@...il.com>,
	Andrey Danin <danindrey@...l.ru>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Stephen Warren <swarren@...dotorg.org>
Subject: Re: [RFC 4/4] ARM: shmobile: r8a7790: adapt DTS for I2C slave support


> > DT pseudocode:
> >
> >         i2c {
> >                 compatible = "nvidia, tegra-i2c";
> >
> >                 ec-slave@42 {
> >                         compatible = "nvidia, ax100-ec-slave";
> >                         reg = <0x42>;
> >                 };
> >         };
> 
> So distinguishing between drivers providing slave services (using slave
> mode) and drivers driving actual slave hardware (using master mode) is
> done based on the compatible-property.

We describe users of one specific I2C bus. And the drivers that go along
with them. No?


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