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Thu, 16 Jul 2026 18:51:39 -0400 (EDT) From: Jiaxing Hu To: andrew@lunn.ch Cc: heiko@sntech.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 2/2] arm64: dts: rockchip: Add ArmSoM CM5 and CM5-IO Date: Fri, 17 Jul 2026 10:51:37 +1200 Message-ID: <20260716225137.2544880-1-gahing@gahingwoo.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: <20260716081711.2482259-3-gahing@gahingwoo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260716_161232_840516_C141F7B3 X-CRM114-Status: UNSURE ( 6.31 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > Try setting phy-mode to rgmii-id, and these delays to 0, or removing > them. You are right. The PCB does not use long clock lines, so rgmii-id is the correct description and the delays should not be in the DT. Most rk3576 boards upstream already use rgmii-id with no tx_delay/rx_delay. I will switch to rgmii-id, let the YT8531 add both delays internally, drop tx_delay/rx_delay, and re-test the 1000 Mbit/s link on the board before I send v4. Thanks, Jiaxing