linux-kernel - Re: [PATCH v3 0/8] rtc: at91sam9: add DT support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140911120659.14daa624@bbrezillon>
Date:	Thu, 11 Sep 2014 12:06:59 +0200
From:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
To:	Johan Hovold <johan@...nel.org>
Cc:	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, Johan Hovold <jhovold@...il.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,
	Douglas Gilbert <dgilbert@...erlog.com>
Subject: Re: [PATCH v3 0/8] rtc: at91sam9: add DT support

On Thu, 11 Sep 2014 11:39:42 +0200
Johan Hovold <johan@...nel.org> wrote:

> On Thu, Sep 11, 2014 at 10:55:59AM +0200, Boris BREZILLON wrote:
> 
> > Johan, let me know if this version addresses part of your concerns.
> 
> Looks good to me. I just have a few minor comments on two of the patches.
> 
> > I'm open to any suggestion/rework to address other previously discussed
> > issues, as long as it does not end up in a dead-end (like the discussion
> > you had last year):
> >  - the fact that the RTT block could be used for something that is not
> >    an RTC
> >  - the fact that referencing the GPBR node and defining a GPBR register
> >    number to store RTC time info could be considered as an HW config and
> >    not an HW description and thus should not be described in the DT
> 
> No doubt.

Okay then. Any suggestion to do otherwise ?
Alexandre suggested to pass the GPBR register number through a module
parameter, and retrieve the GPBR syscon by searching for a gpbr node
(or atmel,at91sam9260-gpbr compatible node) in the device tree.

I'm not a big fan of this solution, as it implies passing driver
specific config to the global cmdline (and we'll have to handle the
9263 case where 2 RTT blocks are availables).

Best Regards,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/