From f8b5a33707c9a19ec905d2826be0acd151997a09 Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Fri, 30 Oct 2020 01:55:28 +0100 Subject: [PATCH] ARM: dts: vf610-zii-dev-rev-b: Fix MDIO over clocking The ZII devel B board has two generations of Marvell Switches. The mv88e6352 supports an MDIO clock of 12MHz. However the older 88e6185 does not like 12MHz, and often fails to probe. Reduce the clock speed to 5MHz, which seems to work reliably. Cc: Chris Healy Fixes: b955387667ec ("ARM: dts: ZII: update MDIO speed and preamble") Signed-off-by: Andrew Lunn Reviewed-by: Chris Healy Signed-off-by: Shawn Guo --- arch/arm/boot/dts/vf610-zii-dev-rev-b.dts | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/boot/dts/vf610-zii-dev-rev-b.dts b/arch/arm/boot/dts/vf610-zii-dev-rev-b.dts index e500911ce0a5..6f1e0f0d4f0a 100644 --- a/arch/arm/boot/dts/vf610-zii-dev-rev-b.dts +++ b/arch/arm/boot/dts/vf610-zii-dev-rev-b.dts @@ -406,6 +406,9 @@ }; }; +&mdio1 { + clock-frequency = <5000000>; +}; &iomuxc { pinctrl_gpio_e6185_eeprom_sel: pinctrl-gpio-e6185-eeprom-spi0 { -- 2.50.1