From a0b9fe9f3cd79bee2f7f1755310435792942435f Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Fri, 23 Apr 2021 15:02:58 +0100
Subject: [PATCH] ARM: dts: bcm2711-rpi-400: Limit MDIO clock speed

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 arch/arm/boot/dts/bcm2711-rpi-400.dts | 4 ++++
 1 file changed, 4 insertions(+)

--- a/arch/arm/boot/dts/bcm2711-rpi-400.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-400.dts
@@ -616,6 +616,10 @@
 	brcm,disable-headphones = <1>;
 };
 
+&genet_mdio {
+	clock-frequency = <1950000>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";