linux-kernel - Re: [PATCH] ARM: dts: am335x-boneblack: add i2c1 DT entry

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Date:	Thu, 2 Jun 2016 10:56:35 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Robert Nelson <robertcnelson@...il.com>
Cc:	Yong Li <yong.b.li@...el.com>,
	Benoit Cousson <bcousson@...libre.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	devicetree <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux kernel <linux-kernel@...r.kernel.org>, sdliyong@...il.com
Subject: Re: [PATCH] ARM: dts: am335x-boneblack: add i2c1 DT entry

* Robert Nelson <robertcnelson@...il.com> [160602 10:48]:
> On Thu, Jun 2, 2016 at 12:39 PM, Tony Lindgren <tony@...mide.com> wrote:
> >
> > * Robert Nelson <robertcnelson@...il.com> [160602 10:39]:
> > > On Thu, Jun 2, 2016 at 2:41 AM, Yong Li <yong.b.li@...el.com> wrote:
> > >
> > > > From: Yong Li <sdliyong@...il.com>
> > > >
> > > > Without this patch, I2C-1 is missing on beaglebone black boards
> > > >
> > > > Signed-off-by: Yong Li <sdliyong@...il.com>
> > > > ---
> > > >  arch/arm/boot/dts/am335x-boneblack.dts | 15 +++++++++++++++
> > > >  1 file changed, 15 insertions(+)
> > > >
> > >
> > >
> > > This is also 'common' for the white/green, if your really going to push
> > > this, please add it to:
> > >
> > > am335x-bone-common.dtsi
> >
> > But isn't this exposed on the cape pins? So the use can be
> > whatever for these pins?
> 
> That is correct, "i2c1" is on the cape connector, with no primary
> function defined.
> 
> Currently on mainline, the board and cape eeprom i2c bus's are enabled.
> 
> i2c0 = board eeprom
> i2c2 = 'cape' eeprom
> 
> personally, nak by me to add i2c1 by default, should use overlay's to enable it.

Yes sounds like the best we can do is define it but set it with
status = "disabled" for now.

Regards,

Tony