Received-SPF: pass (google.com: domain of linux-kernel+bounces-106298-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99;
Message-ID: <7d1ad037-d8ac-4b9a-b6d2-ab683e52a898@arinc9.com>
Date: Mon, 18 Mar 2024 18:26:48 +0300
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH 1/2] arm64: dts: mediatek: mt7622: set PHY address of
 MT7531 switch to 0x1f
Content-Language: en-US
To: Florian Fainelli <f.fainelli@gmail.com>, Rob Herring
 <robh+dt@kernel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>,
 Matthias Brugger <matthias.bgg@gmail.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: mithat.guner@xeront.com, erkin.bozoglu@xeront.com,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org
References: <20240314-for-mediatek-mt7531-phy-address-v1-0-52f58db01acd@arinc9.com>
 <20240314-for-mediatek-mt7531-phy-address-v1-1-52f58db01acd@arinc9.com>
 <94e3d09a-e6a4-4808-bc29-3f494b65e170@gmail.com>
 <62d128f1-11ac-4669-90ff-e9cdd0ec5bd9@arinc9.com>
 <71dd200a-0306-4baa-abab-6e6906aeef2a@gmail.com>
From: =?UTF-8?B?QXLEsW7DpyDDnE5BTA==?= <arinc.unal@arinc9.com>
In-Reply-To: <71dd200a-0306-4baa-abab-6e6906aeef2a@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

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?

Arınç