linux-kernel - Re: [PATCH v4 1/2] ARM: dts: imx6: Add support for Toradex Apalis iMX6Q/D SoM

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Message-ID: <1454540539.11389.14.camel@toradex.com>
Date:	Wed, 3 Feb 2016 23:02:22 +0000
From:	Marcel Ziswiler <marcel.ziswiler@...adex.com>
To:	"shawnguo@...nel.org" <shawnguo@...nel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"stefan@...er.ch" <stefan@...er.ch>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"festevam@...il.com" <festevam@...il.com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"stillcompiling@...il.com" <stillcompiling@...il.com>,
	"ynezz@...e.cz" <ynezz@...e.cz>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"l.stach@...gutronix.de" <l.stach@...gutronix.de>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>
Subject: Re: [PATCH v4 1/2] ARM: dts: imx6: Add support for Toradex Apalis
 iMX6Q/D SoM

On Wed, 2016-02-03 at 23:55 +0100, Marcel Ziswiler wrote:
> On Mon, 2016-02-01 at 21:29 +0800, Shawn Guo wrote:
> 
> [snip]
> 
> > +	/* STMPE811 touch screen controller */
> > > +	stmpe811@41 {
> > > +		compatible = "st,stmpe811";
> > 
> > The compatible seems to be used by kernel without a binding
> > document.
> 
> Indeed and looking at git logs Linus himself introduced it (;-p):
> 
> commit 5a826feedc331a2d5ced2afd832199a70b3af891
> Author: Linus Walleij <linus.walleij@...aro.org>
> Date:   Wed Apr 23 23:35:58 2014 +0200
> Subject: mfd: stmpe: Probe properly from the Device Tree

Looking more closely there is actually a proper binding document which
got added by Lee Jones:

commit 84e6de813b2d1bdb127943d3c8edf1c1afaa90da
Author: Lee Jones <lee.jones@...aro.org>
Date:   Mon Nov 5 16:10:34 2012 +0100
Subject: Documentation: Describe bindings for STMPE Multi-Functional
Device driver

Documentation/devicetree/bindings/mfd/stmpe.txt

Required properties:
 - compatible                   : "st,stmpe[811|1601|2401|2403]"

Sorry for the noise.