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Sun, 04 May 2025 17:52:55 -0700 (PDT) Message-ID: <44a4aef7-9d23-4a6e-a228-39bfd3e2a308@gmail.com> Date: Sun, 4 May 2025 20:52:54 -0400 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/3] arm64: dts: rockchip: Add Luckfox Omni3576 Board support To: Andrew Lunn Cc: Jonas Karlman , heiko@sntech.de, robh@kernel.org, conor+dt@kernel.org, detlev.casanova@collabora.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, krzk+dt@kernel.org, linux-arm-kernel@lists.infradead.org References: <20250502205533.51744-1-inindev@gmail.com> <20250504102447.153551-1-inindev@gmail.com> <20250504102447.153551-4-inindev@gmail.com> <87892840-bdbf-43d4-bd93-cb98f5e1c672@lunn.ch> <46cbdabd-b0ed-4c9b-9f01-4d2d8eceac24@gmail.com> <13407dae-4c73-48a9-846e-92f08449bc4d@lunn.ch> Content-Language: en-US From: John Clark In-Reply-To: <13407dae-4c73-48a9-846e-92f08449bc4d@lunn.ch> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 5/4/25 8:45 PM, Andrew Lunn wrote: >>> What PHY is it? Are you using the correct PHY driver for it, or >>> genphy? >>> >> MAE0621A-Q3C >> http://www.maxio-tech.com/product/12928/12929/12930/12931.html > > Mainline does not have a PHY driver for this. So nothing is > controlling the delays in the PHY. So what you have above works by > luck, and is likely to break once there is a PHY driver. So i suggest > you drop the Ethernet nodes for the moment. > The chip claims to be a pin-for-pin clone of the rtl8211f. Empirical testing has demonstrated it to be extremely stable. Without networking IO the board is very difficult to develop against. I can disable networking if that is the consensus. > There does appear to be a PHY driver here: > > https://github.com/CoreELEC/linux-amlogic/blob/5.15.153_202501/drivers/net/phy/maxio.c > > but it has a number of things wrong with it. You might want to search > around and see if there are any cleaner versions around, or if anybody > is working on upstreaming a driver for this PHY. > > Andrew