[PATCH v3 0/8] rtc: at91sam9: add DT support

[boris.brezillon@free-electrons.com (Boris BREZILLON)]

On Thu, 11 Sep 2014 11:39:42 +0200
Johan Hovold <johan@kernel.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