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

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Date: Tue, 2 Jan 2024 09:57:48 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Jie Luo <quic_luoj@...cinc.com>
Cc: Andrew Lunn <andrew@...n.ch>, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	hkallweit1@...il.com, corbet@....net, p.zabel@...gutronix.de,
	f.fainelli@...il.com, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, Christian Marangi <ansuelsmth@...il.com>
Subject: Re: [PATCH v8 14/14] dt-bindings: net: ar803x: add qca8084 PHY
 properties

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.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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