Re: [PATCH v3 03/11] arm64: dts: freescale: imx8mm-var-som: Update FEC support with MaxLinear PHY
From: Frank Li <Frank.li@nxp.com>
Date: 2026-03-13 15:53:51
Also in:
imx, linux-devicetree, lkml
On Sat, Mar 07, 2026 at 04:54:39PM +0100, Stefano Radaelli wrote:
From: Stefano Radaelli <redacted>
From: Stefano Radaelli <redacted>
Update the FEC Ethernet controller on the i.MX8MM VAR-SOM to match the
latest SOM hardware revision using the integrated MaxLinear MXL86110 PHY.
Add the PHY VDDIO supply regulator, adjust reset timings and add a
pinctrl sleep state for low-power operation.
The PHY LED signals originate on the SOM, but the actual LEDs are part
of the carrier implementation (RJ45 connector). Move the LED
configuration to the Symphony carrier device tree, matching the
evaluation board LED wiring.
The enet_rst GPIO hog on the carrier is kept to ensure a defined
board-level reset line state during boot.
Wake-on-LAN via magic packet is not supported at the VAR-SOM level and
is therefore not enabled in the SOM device tree nor in the official
evaluation carrier board configuration (symphony).
Designs requiring WoL support may enable it in their own carrier-specific
device trees if properly integrated at the hardware level.
+ enet-rst-hog {
+ gpio-hog;
+ gpios = <5 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "enet_rst";
+ };
+Any enet referent to this gpio node, otherwise can't guarantee device probe order, maybe enet driver probe before gpio. rst is critcial signal. Frank