Re: Supporting two SMSC9221 interfaces on GPMC in a dts

Re: Supporting two SMSC9221 interfaces on GPMC in a dts

[Tony Lindgren]

Hi,

Adding devicetree list to Cc as well if somebody has a good solution.

* Ash Charles <ashcharles-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> [150128 18:54]:
> Hi,
> 
> The Gumstix Tobi-Duo board has two SMSC9221 NICs attached to the GPMC
> interface of an OMAP3.  I'm trying to figure out how best to include
> both interfaces in the device tree file.
> With just one interface, I can #include "omap-gpmc-smsc9221.dtsi", add
> the extra board specific settings in to "ethernet@gpmc" in the board
> file as well as any settings needed for the gpmc.
>
> For two interfaces though, I can setup the gpmc details, configure one
> "ethernet@gpmc" node as before but then, need to manually create (i.e.
> copy the meat from the "omap-gpmc-smsc9221.dtsi") a second node.
 
Yeah I think this is how we did it for omap3-sbc-*.dts*.

> This works but seems, well, verbose.  Is there a way to setup multiple
> interfaces without having to duplicate the omap-gpmc-smsc9221.dtsi
> content?

Hmm I wonder if the "[PATCH] dtc: parser: Add label while overriding
nodes" would help with this too?

I agree it would be nice to be able to have device specific .dtsi
file that can be included multiple times for the most common devices.

Regards,

Tony
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Re: Supporting two SMSC9221 interfaces on GPMC in a dts

[Ash Charles]

On Thu, Jan 29, 2015 at 8:20 AM, Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> wrote:
> Yeah I think this is how we did it for omap3-sbc-*.dts*.
>
>> This works but seems, well, verbose.  Is there a way to setup multiple
>> interfaces without having to duplicate the omap-gpmc-smsc9221.dtsi
>> content?
>
> Hmm I wonder if the "[PATCH] dtc: parser: Add label while overriding
> nodes" would help with this too?
>
> I agree it would be nice to be able to have device specific .dtsi
> file that can be included multiple times for the most common devices.
Thanks Tony.

For now, I'll follow the lead of omap3-sbc-*.dts* for now in lieu of
another technique suggestion.  The "[PATCH] dtc: parser: Add label
while overriding nodes" patch definitely looks promising so I'll watch
for that landing in hopes of testing it for this case.

--Ash
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