IPQ40xx: Add support for MDIO

Lets add the necessary DTS node and pinctrl properties for newly added MDIO driver.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>

arch/arm/dts/qcom-ipq4019.dtsi

@@ -103,6 +103,34 @@
 			u-boot,dm-pre-reloc;
 		};
 
+		mdio: mdio@90000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "qcom,ipq4019-mdio";
+			reg = <0x90000 0x64>;
+			status = "disabled";
+
+			ethphy0: ethernet-phy@0 {
+				reg = <0>;
+			};
+
+			ethphy1: ethernet-phy@1 {
+				reg = <1>;
+			};
+
+			ethphy2: ethernet-phy@2 {
+				reg = <2>;
+			};
+
+			ethphy3: ethernet-phy@3 {
+				reg = <3>;
+			};
+
+			ethphy4: ethernet-phy@4 {
+				reg = <4>;
+			};
+		};
+
 		usb3_ss_phy: ssphy@9a000 {
 			compatible = "qcom,usb-ss-ipq4019-phy";
 			#phy-cells = <0>;

arch/arm/mach-ipq40xx/pinctrl-ipq4019.c

@@ -21,6 +21,10 @@ static const struct pinctrl_function msm_pinctrl_functions[] = {
 	{"blsp_spi0_0", 1}, /* Only for GPIO:12,13,14,15 */
 	{"blsp_spi0_1", 2}, /* Only for GPIO:54,55,56,57 */
 	{"blsp_spi1", 2},
+	{"mdio_0", 1}, /* Only for GPIO6 */
+	{"mdio_1", 2}, /* Only for GPIO53 */
+	{"mdc_0", 1}, /* Only for GPIO7 */
+	{"mdc_1", 2}, /* Only for GPIO52 */
 };
 
 static const char *ipq4019_get_function_name(struct udevice *dev,