linux-kernel - Re: [PATCH 2/3] ARM: dts: imx6ul: add support for Ka-Ro electronics TXUL modules

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Date:	Wed, 13 Jan 2016 12:36:28 +0100
From:	Lothar Waßmann <LW@...O-electronics.de>
To:	Fabio Estevam <festevam@...il.com>
Cc:	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Russell King <linux@....linux.org.uk>,
	Sascha Hauer <kernel@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] ARM: dts: imx6ul: add support for Ka-Ro electronics
 TXUL modules

Hi,

> On Tue, Jan 12, 2016 at 4:01 PM, Lothar Waßmann <LW@...o-electronics.de> wrote:
> 
> > +               spi@0 {
> > +                       compatible = "spidev";
> > +                       reg = <0>;
> > +                       spi-max-frequency = <54000000>;
> > +               };
> > +
> > +               spi@1 {
> > +                       compatible = "spidev";
> > +                       reg = <1>;
> > +                       spi-max-frequency = <54000000>;
> > +               };
> > +       };
> 
> If you leave the spidev node, the spi core will complain loudly about it.
>
I know. But this gives the opportunity to test the SPI interface
without any bogus chip definitions.


Lothar Waßmann