Re: [RFC] Does PHY UTMI data width belong to DWC2 or PHY binding?

Matthijs Kooijman
2013-10-22T10:48:52Z

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Hi Kishon,

On Mon, Oct 21, 2013 at 02:57:26PM +0530, Kishon Vijay Abraham I wrote:
> I think it makes sense to keep the data width property in the dwc2 node itself.
> I mean it describes how the dwc2 IP is configured in that particular SoC (given
> that it can be either <8> or <16>).
If I'm reading the RT3052 datasheet correctly (GHWCFG4 register), the IP
can be configured for 8, 16 or 8 _and_ 16. In the latter case, the "8
and 16 supported" would make sense as a property of dwc2 (though this
value should be autodetectable through GHWCFG4), while the actual 8 or
16 supported by the PHY would make sense as property of a phy.

Note sure if this is really useful in practice as well, or if just
setting the actual width to use on dwc2 makes more sense...

Gr.

Matthijs

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