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ARM: dts: vf610-zii-dev-rev-b: Fix MDIO over clocking

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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 <cphealy@gmail.com>
Fixes: b955387667 ("ARM: dts: ZII: update MDIO speed and preamble")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Andrew Lunn 2020-10-30 01:55:28 +01:00 committed by Shawn Guo
parent 7dd8f0ba88
commit f8b5a33707
1 changed files with 3 additions and 0 deletions
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3
arch/arm/boot/dts/vf610-zii-dev-rev-b.dts
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@ -406,6 +406,9 @@
};
};
&mdio1 {
clock-frequency = <5000000>;
};
&iomuxc {
pinctrl_gpio_e6185_eeprom_sel: pinctrl-gpio-e6185-eeprom-spi0 {