[PATCH] ARM64: dts: update MDIO speed and preamble for zii-ultra device

[Chris Healy]

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 at gmail.com>
---
 arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
b/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
index 6a55165bd76a..98aa67a4c040 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi
@@ -132,6 +132,8 @@
         #address-cells = <1>;
         #size-cells = <0>;
         status = "okay";
+        suppress-preamble = <1>;
+        clock-frequency = <12500000>;

         switch: switch at 0 {
             compatible = "marvell,mv88e6085";
-- 
2.21.3