Date: Thu, 12 Feb 2015 06:58:36 -0800
From: =?utf-8?B?U8O2cmVu?= Brinkmann <soren.brinkmann@xilinx.com>
To: Michal Simek <michal.simek@xilinx.com>
CC: Mark Rutland <mark.rutland@arm.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "monstr@monstr.eu" <monstr@monstr.eu>,
        Andreas =?utf-8?Q?F=C3=A4rber?= <afaerber@suse.de>,
        Russell King <linux@arm.linux.org.uk>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        Steffen Trumtrar <s.trumtrar@pengutronix.de>,
        Kumar Gala <galak@codeaurora.org>,
        Peter Crosthwaite <peter.crosthwaite@xilinx.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <Pawel.Moll@arm.com>,
        Rob Herring <robherring2@gmail.com>,
        Josh Cartwright <josh.cartwright@ni.com>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2] ARM: dts: zynq: Add OCM node
References: <6df19b400e314ef8228be475bb8ba83765683016.1423737765.git.michal.simek@xilinx.com>
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On Thu, 2015-02-12 at 12:01PM +0100, Michal Simek wrote:
> On 02/12/2015 11:54 AM, Mark Rutland wrote:
> > On Thu, Feb 12, 2015 at 10:42:47AM +0000, Michal Simek wrote:
> >> Add OCM node for all zynq boards. OCM location
> >> can changed but for all current boards this
> >> is the location where OCM is.`
> >>
> >> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
> >> ---
> >>
> >> Changes in v2:
> >> - Move node to board file suggested by Mark
> >>
> >> This patch is done based on discussion here.
> >> https://lkml.org/lkml/2014/12/1/396
> >>
> >> Mark: I expect you won't like amba bus reference or
> >> am I wrong?
> > 
> > I'm fine with dropping things onto a bus in this way. If we're happy to
> > do it for other nodes I don't see why busses should be special.
> 
> Wonderful. I will give people some time to comment this style.

Given that the location is discoverable, wouldn't it make sense to let
'reg' point to the ctrl/cfg registers in the SLCR and let the driver
handle the whereabouts of the OCM location? (but I guess this is going
in circles now, such a proposal was on the table at some point, IIRC).
But I'd prefer:
	memory-controller@0xfffc0000 { /* the address here would of course not match all configurations */
		interrupts = ...;
		syscon = &slcr;
	};

	Soren
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