On Thu, Sep 08, 2016 at 02:50:37PM +0200, Andreas Färber wrote:
> Am 08.09.2016 um 14:04 schrieb Andreas Färber:
> > Am 08.09.2016 um 09:53 schrieb Neil Armstrong:
> >> This patchset adds a specific compatible string in the Meson SPIFC driver 
> >> for
> >> the Amlogic Meson GXBB SoC.
> > 
> > Any particular reason? We could just reuse the meson6 one since there
> > appear to be no code changes so far.
> 
> So Neil is essentially telling me they don't know whether there are any
> differences in the IP block, so a separate compatible string was chosen.
> 
> No objection from my side, but a general clarification from device tree
> maintainers when and when not to would be appreciated. (+ devicetree)

New chip, always define a new compatible. If you think they are the same 
or are close enough to function with the existing driver, then put both 
compatible strings in the DT.

Rob

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