linux-kernel - [PATCH V2 07/10] arm64: dts: imx8mn-beacon: Configure Ethernet PHY reset and GPIO IRQ

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250416010141.1785841-7-aford173@gmail.com>
Date: Tue, 15 Apr 2025 20:01:33 -0500
From: Adam Ford <aford173@...il.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: aford@...conembedded.com,
	Frank.li@....com,
	Adam Ford <aford173@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH V2 07/10] arm64: dts: imx8mn-beacon: Configure Ethernet PHY reset and GPIO IRQ

The Ethernet PHY setup currently assumes that the bootloader will take the
PHY out of reset, but this behavior is not guaranteed across all
bootloaders. Add the reset GPIO to ensure the kernel can properly control
the PHY reset line.

Also configure the PHY IRQ GPIO to enable interrupt-driven link status
reporting, instead of relying on polling.

This ensures more reliable Ethernet initialization and improves PHY event
handling.

Signed-off-by: Adam Ford <aford173@...il.com>
---
V2:  Update commit message. No active changes.

 arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi
index bb11590473a4..b3692b367a42 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi
@@ -88,6 +88,9 @@ mdio {
 		ethphy0: ethernet-phy@0 {
 			compatible = "ethernet-phy-ieee802.3-c22";
 			reg = <0>;
+			reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
+			interrupt-parent = <&gpio1>;
+			interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
 		};
 	};
 };
@@ -326,6 +329,7 @@ MX8MN_IOMUXC_ENET_TXC_ENET1_RGMII_TXC	0x1f
 			MX8MN_IOMUXC_ENET_RXC_ENET1_RGMII_RXC	0x91
 			MX8MN_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL	0x91
 			MX8MN_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL	0x1f
+			MX8MN_IOMUXC_GPIO1_IO10_GPIO1_IO10             0x146
 			MX8MN_IOMUXC_SAI2_RXC_GPIO4_IO22	0x19
 		>;
 	};
-- 
2.48.1