arm64: dts: zii-ultra: update MDIO speed and preamble

Update MDIO configuration with zii-ultra device to fully utilize
MDIO endpoint capabilities.  Device supports 12.5MHz clock and
doesn't require MDIO preamble.

Signed-off-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi b/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
index 6a55165bd76ac420438390fafe548be373ba29e0..0d1088dcaa0226f8a0f5bd3be5696c973d9ef249 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
@@ -131,6 +131,8 @@
        mdio {
                #address-cells = <1>;
                #size-cells = <0>;
+               clock-frequency = <12500000>;
+               suppress-preamble;
                status = "okay";
 
                switch: switch@0 {