linux-kernel - Re: [PATCH 5/5] rtc: at91sam9: add DT bindings documentation

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Message-ID: <20140910155732.GM2974@localhost>
Date:	Wed, 10 Sep 2014 17:57:32 +0200
From:	Johan Hovold <johan@...nel.org>
To:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
Cc:	Johan Hovold <johan@...nel.org>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Andrew Victor <linux@...im.org.za>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.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>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] rtc: at91sam9: add DT bindings documentation

On Wed, Sep 10, 2014 at 05:35:32PM +0200, Boris BREZILLON wrote:
> On Wed, 10 Sep 2014 17:07:02 +0200 Johan Hovold <johan@...nel.org> wrote:

> > Yes, this essentially what I suggested in the thread (and my last reply)
> > and relying on syscon rather than a custom driver seems like a good
> > idea. It would allow early access to the registers too with the recently
> > proposed changes. It would not guarantee any kind of exclusivity,
> > though, but I guess that's tolerable?
> 
> I know about the "mfd: syscon: Decouple syscon interface from platform
> devices" series, but I wonder why we would need to access GPBR
> registers during early boot stages. Do you have something in mind :-)?

Yeah, that's what I was referring to. In the thread from last year,
Jean-Christophe mentioned something about barebox using the
backup-registers. Not sure about the details, though.

Johan
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