Re: [PATCH v8 14/14] dt-bindings: net: ar803x: add qca8084 PHY properties

[Jie Luo]

On 12/17/2023 3:08 AM, Russell King (Oracle) wrote:
> On Sat, Dec 16, 2023 at 06:30:00PM +0100, Andrew Lunn wrote:
> > > The following is the chip package, the chip can work on the switch mode
> > > like the existed upstream code qca8k, where PHY1-PHY4 is connected with
> > > MAC1-MAC4 directly; The chip can also work on the PHY mode, where PHY1-
> > > PHY4 is connected with PCS1 by 10g-qxgmii; Either switch mode or PHY mode,
> > > the PHY4 is optionally connected with PCS0 by SGMII, PCS0 and PCS1
> > > are connected with the SoC(IPQ platform) PCSes.
> >
> > I don't really understand. Are you saying the hardware is actually :
> >
> >
> > +----------------------------------------------+
> > |          PCS1           PCS0                 |
> > |                                              |
> > |          MAC0           MAC5                 |
> > |           |              |                   |
> > |     +-----+--------------+-------------+     |
> > |     |                                  |     |
> > |     |                Switch            |     |
> > |     |                                  |     |
> > |     +-+---------+---------+---------+--+     |
> > |       |         |         |         |        |
> > |      MAC1      MAC2      MAC3      MAC4      |
> > |                                              |
> > |      PHY1      PHY2      PHY3      PHY4      |
> > +----------------------------------------------+
> >
> > When in PHY mode, the switch is hard coded to map the 4 PCS1 channels
> > straight to MAC1-MAC4 and all switch functionality is disabled. But
> > then in switch mode, the switch can be controlled as a DSA switch? The
> > 10G PCS1 is then a single 10G port, not 4x 2.5G?
> >
> > Is there a product brief for this PHY? That might help us understand
> > this hardware?
>
> Not even digikey give any clues what "QCA8084" is - they list it as
> "unclassified" and give no documentation and no photo. Basically it
> seems to be a super secret device.
Sorry for the confusion here, maybe the chip is developed recently,
which leads to the Doc or introduction is not released in time.