linux-kernel - Re: [PATCH v2 3/3] arm: dt: zynq: Add support for the zed platform

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Date:	Wed, 12 Jun 2013 21:33:58 +0200
From:	Steffen Trumtrar <s.trumtrar@...gutronix.de>
To:	Sören Brinkmann <soren.brinkmann@...inx.com>
Cc:	Michal Simek <michal.simek@...inx.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Dinh Nguyen <dinguyen@...era.com>,
	Olof Johansson <olof@...om.net>,
	Shawn Guo <shawn.guo@...aro.org>
Subject: Re: [PATCH v2 3/3] arm: dt: zynq: Add support for the zed platform

On Wed, Jun 12, 2013 at 11:26:34AM -0700, Sören Brinkmann wrote:
> On Wed, Jun 12, 2013 at 08:23:45PM +0200, Steffen Trumtrar wrote:
> > On Wed, Jun 12, 2013 at 09:41:08AM -0700, Soren Brinkmann wrote:
> > > Add a DT fragment for the Zed Zynq platform and a corresponding
> > > target to the Makefile
> > > 
> > > Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> > > ---
> > > I used the 'xlnx,...' compat strings since it seems this is what is
> > > used in the Xilinx and Digilent vendor trees.
> > > 
> > > +/include/ "zynq-7000.dtsi"
> > > +
> > > +/ {
> > > +	model = "Zynq Zed Development Board";
> > > +	compatible = "xlnx,zynq-zed", "xlnx,zynq-7000";
> > > +
> > > +	memory {
> > > +		device_type = "memory";
> > > +		reg = <0 0x20000000>;
> > > +	};
> > > +
> > > +	chosen {
> > > +		bootargs = "console=ttyPS1,115200 earlyprintk";
> > > +	};
> > > +
> > > +};
> > 
> > Hi!
> > 
> > This looks a little bit to basic. No?! Not even an UART?
> The UART is imported from the common zynq-7000.dtsi.

Hm, you are actually right, although I think that you shouldn't be.
It is possible to NOT use the UARTs, isn't it? So, default on for both UARTs is wrong.

> 
> > The compatible should include digilent or avnet. Digilent only sells to academic
> > customers, Avnet doesn't.
> I don't care at all. So, who makes the decision which one is the correct
> one? Actually we could even drop the zed specific one completely and go
> with 'xlnx,zynq-7000' only.

I'm okay with that.

Regards,
Steffen


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