From mboxrd@z Thu Jan  1 00:00:00 1970
From: marcel.ziswiler@toradex.com (Marcel Ziswiler)
Date: Wed, 3 Feb 2016 23:02:22 +0000
Subject: [PATCH v4 1/2] ARM: dts: imx6: Add support for Toradex Apalis
 iMX6Q/D SoM
In-Reply-To: <1454540116.11389.11.camel@toradex.com>
References: <1453675703-31594-1-git-send-email-marcel.ziswiler@toradex.com>
 <1453675703-31594-2-git-send-email-marcel.ziswiler@toradex.com>
 <20160201132916.GF10671@tiger> <1454540116.11389.11.camel@toradex.com>
Message-ID: <1454540539.11389.14.camel@toradex.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

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 at 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@linaro.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@linaro.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.