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

[Jie Luo]

On 1/2/2024 6:08 PM, Christian Marangi wrote:
> On Tue, Jan 02, 2024 at 09:57:48AM +0000, Russell King (Oracle) wrote:
> > On Mon, Dec 18, 2023 at 11:01:03AM +0800, Jie Luo wrote:
> > > On 12/17/2023 12:09 AM, Russell King (Oracle) wrote:
> > > > On Sat, Dec 16, 2023 at 10:41:28PM +0800, Jie Luo wrote:
> > > > > On 12/16/2023 9:51 PM, Russell King (Oracle) wrote:
> > > > > > On Sat, Dec 16, 2023 at 11:21:53AM +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;
> > > > > > >
> > > > > > > Ah, that is new information, and has a big effect on the design.
> > > > > >
> > > > > > This QCA8084 that's being proposed in these patches is not a PHY in
> > > > > > itself, but is a SoC. I came across this:
> > > > > >
> > > > > >     https://www.rt-rk.com/android-tv-solution-tv-in-smartphone-pantsstb-based-on-qualcomm-soc-design/
> > > > >
> > > > > The chip mentioned in the link you mentioned is SoC, which is not the
> > > > > chip that the qca8084 driver work for.
> > > >
> > > > So there's two chips called QCA8084 both produced by Qualcomm? I find
> > > > that hard to believe.
> > >
> > > The SoC mentioned in the link you provided is the APQ8084 that is introduced
> > > in the link below:
> > > https://www.qualcomm.com/products/mobile/snapdragon/smartphones/snapdragon-8-series-mobile-platforms/snapdragon-processors-805
> >
> > So the one mentioned in the rt-rk article and a load of CVEs is _not_
> > QCA8084 but is APQ8084. Sounds like a lot of people are getting stuff
> > wrong - which is hardly surprising as there are people that seem to
> > _enjoy_ getting the technical details wrong. I haven't worked out if
> > it's intentional malace, or they're just fundamentally lazy individuals
> > who just like to screw with other people.
> >
> > Sigh.
>
> Hoping to give some clarification with the naming.
> - APQ8084 ("Application" SoC for 8084 family)
> - IPQ8084 ("Internet" SoC version of APQ8084)
> - QCA8084 (Integrated PHYs in the IPQ8084 SoC)
>
> I guess? >
> Considering QCA8084 is only in in IPQ8084 SoC, the confusion with
> referring to it is in the fact that it's all the same thing, and
> everything related to APQ is also related to IPQ since they are the same
> SoC with minor difference (different DSP, presence of NSS cores)
>
> I can totally see sencente like "The IPQ8084 PHYs..." referencing the
> QCA8084 PHY.
>
> (Just to put how the naming is confusing there are PMIC with the
> same exact naming)

There should be NO IPQ8084.
Yes, APQ8084 is the application SoC.
QCA8084 is the pure PHY chip which has quad-phy.

The prefix QCA is the Ethernet device, like qca8081(PHY chip), qca8386(
switch chip) and qca8084(PHY chip).
The prefix IPQ is the internet processor SoC, like ipq5332.