linux-kernel - Re: [PATCH 10/15] arm64: dts: mediatek: mt7981b: Add Ethernet and WiFi offload support

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Message-ID: <8a637fc2-7768-4816-bb4f-3af2e32908e4@collabora.com>
Date: Mon, 20 Oct 2025 12:27:53 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Daniel Golle <daniel@...rotopia.org>, Sjoerd Simons <sjoerd@...labora.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
 <matthias.bgg@...il.com>, Ryder Lee <ryder.lee@...iatek.com>,
 Jianjun Wang <jianjun.wang@...iatek.com>, Bjorn Helgaas
 <bhelgaas@...gle.com>, Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kwilczynski@...nel.org>,
 Manivannan Sadhasivam <mani@...nel.org>,
 Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>, Lee Jones <lee@...nel.org>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Lorenzo Bianconi <lorenzo@...nel.org>, Felix Fietkau <nbd@....name>,
 kernel@...labora.com, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, linux-pci@...r.kernel.org,
 linux-phy@...ts.infradead.org, netdev@...r.kernel.org,
 Bryan Hinton <bryan@...anhinton.com>
Subject: Re: [PATCH 10/15] arm64: dts: mediatek: mt7981b: Add Ethernet and
 WiFi offload support

Il 16/10/25 18:47, Daniel Golle ha scritto:
> On Thu, Oct 16, 2025 at 12:08:46PM +0200, Sjoerd Simons wrote:
>> Add device tree nodes for the Ethernet subsystem on MT7981B SoC,
>> including:
>> - Ethernet MAC controller with dual GMAC support
>> - Wireless Ethernet Dispatch (WED)
>> - SGMII PHY controllers for high-speed Ethernet interfaces
>> - Reserved memory regions for WiFi offload processor
>>
>> Signed-off-by: Sjoerd Simons <sjoerd@...labora.com>
>> ---
>>   arch/arm64/boot/dts/mediatek/mt7981b.dtsi | 133 ++++++++++++++++++++++++++++++
>>   1 file changed, 133 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
>> index 13950fe6e8766..c85fa0ddf2da8 100644
>> --- a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
>> +++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi

..snip..

>> +
>> +			mdio_bus: mdio-bus {
>> +				#address-cells = <1>;
>> +				#size-cells = <0>;
>> +
>> +				int_gbe_phy: ethernet-phy@0 {
>> +					compatible = "ethernet-phy-ieee802.3-c22";
>> +					reg = <0>;
>> +					phy-mode = "gmii";
>> +					phy-is-integrated;
>> +					nvmem-cells = <&phy_calibration>;
>> +					nvmem-cell-names = "phy-cal-data";
> 
> Please also define the two LEDs here with their corresponding (only)
> pinctrl options for each of them, with 'status = "disabled";'. This
> makes it easier for boards to make use of the Ethernet PHY leds by just
> referencing the LED and setting the status to 'okay'.
> 

Sorry Daniel, definitely no. The LEDs really are board specific.

Try to convince me otherwise, but for this one I really doubt that you can.

Cheers,
Angelo