Re: [PATCH 1/2] arm64: dts: mediatek: mt7622: set PHY address of MT7531 switch to 0x1f

From: Arınç ÜNAL
Date: Mon Mar 18 2024 - 11:52:52 EST


On 18.03.2024 18:38, Florian Fainelli wrote:
On 3/18/24 08:26, Arınç ÜNAL wrote:
On 18.03.2024 16:02, Florian Fainelli wrote:
Can we call it a pseudo PHY to use a similar terminology as what is done through drivers/net/dsa/{bcm_sf2,b53}*?

This is not a real PHY as in it has no actual transceiver/digital signal processing logic, this is a piece of logic that snoops for MDIO transactions at that specific address and lets you access the switch's internal register as if it was a MDIO device.

I can get behind calling the switch a psuedo-PHY in the context of MDIO.
However, as described on "22.2.4.5.5 PHYAD (PHY Address)" of "22.2.4.5
Management frame structure" of the active standard IEEE Std 802.3™‐2022,
the field is called "PHY Address". The patch log doesn't give an identifier
as to what a switch is in the context of MDIO. Only that it listens on a
certain PHY address which the term complies with IEEE Std 802.3™‐2022.

So I don't see an improvement to be made on the patch log. Feel free to
elaborate further.

I would just s/PHY/MDIO bus address/ since that is simply more generic, but if it is not written as-is in the spec, then I won't fight it much more than I already did.

I'm not sure what you're referring to by spec. Are you asking how specific
the name of the PHYAD field is described on the standard?

Spec = IEEE Std 802.3-2022 standard, aka the document you are quoting.

Ok. The field is referred to as "PHY Address" (capital A) in a sentence on
the standard. I interpret that as it defines the term to mention the field
in a sentence which is why I'd like to stick to it on my patch log.

Arınç