netdev - Re: [PATCH v11 5/5] powerpc: Fix up fsl-flexcan device tree binding.

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Date:	Wed, 10 Aug 2011 12:19:33 -0500
From:	Robin Holt <holt@....com>
To:	Scott Wood <scottwood@...escale.com>
Cc:	Robin Holt <holt@....com>, Kumar Gala <galak@...nel.crashing.org>,
	Wolfgang Grandegger <wg@...ndegger.com>,
	U Bhaskar-B22300 <B22300@...escale.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	socketcan-core@...ts.berlios.de, netdev@...r.kernel.org,
	PPC list <linuxppc-dev@...ts.ozlabs.org>,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH v11 5/5] powerpc: Fix up fsl-flexcan device tree
 binding.

On Wed, Aug 10, 2011 at 11:56:28AM -0500, Scott Wood wrote:
> On 08/10/2011 11:27 AM, Robin Holt wrote:
> > -CPI Clock- Can Protocol Interface Clock
> > -	This CLK_SRC bit of CTRL(control register) selects the clock source to
> > -	the CAN Protocol Interface(CPI) to be either the peripheral clock
> > -	(driven by the PLL) or the crystal oscillator clock. The selected clock
> > -	is the one fed to the prescaler to generate the Serial Clock (Sclock).
> > -	The PRESDIV field of CTRL(control register) controls a prescaler that
> > -	generates the Serial Clock (Sclock), whose period defines the
> > -	time quantum used to compose the CAN waveform.
> > +- compatible : Should be "fsl,flexcan" and optionally
> > +               "fsl,flexcan-<processor>"
> 
> fsl,<processor>-flexcan, and it should not be optional, and should come
> before "fsl,flexcan".
> 
> Also may want to list fsl,p1010-rdb as a "canonical compatible" for
> anything which is backwards compatible with p1010's implementation.

How do I specify 'canonical compatible'?  What would be the use of it
in that implementation?

Robin
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