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

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Date: Wed, 3 Jan 2024 21:27:26 +0800
From: Jie Luo <quic_luoj@...cinc.com>
To: Christian Marangi <ansuelsmth@...il.com>,
        "Russell King (Oracle)"
	<linux@...linux.org.uk>
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>
Subject: Re: [PATCH v8 14/14] dt-bindings: net: ar803x: add qca8084 PHY
 properties



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.