[C57][DTS][C57-64] Add ADC support

arch/arm64/boot/dts/seco/seco-imx8qxp-c57.dts

@@ -82,6 +82,12 @@
         compatible = "simple-bus";
         #address-cells = <1>;
         #size-cells = <0>;
+        reg_adc_vref_1v8: adc_vref_1v8 {
+                        compatible = "regulator-fixed";
+                        regulator-name = "vref_1v8";
+                        regulator-min-microvolt = <1800000>;
+                        regulator-max-microvolt = <1800000>;
+        };
 
         /*cn15 connector*/
         reg_en_bckl1_drv: en_bckl_drv {
@@ -550,6 +556,13 @@
                 IMX8QXP_MIPI_DSI0_I2C0_SDA_MIPI_DSI0_I2C0_SDA		0xc6000020
             >;
         };
+
+        pinctrl_adc0: adc0grp {
+            fsl,pins = <
+                    IMX8QXP_ADC_IN4_ADMA_ADC_IN4               0x60
+                    IMX8QXP_ADC_IN5_ADMA_ADC_IN5               0x60
+            >;
+        };
     };
 };
 
@@ -904,6 +917,13 @@ gpio5: &lsio_gpio5 {
     };
 };
 
+&adc0{
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_adc0>;
+        vref-supply = <&reg_adc_vref_1v8>;
+        status = "okay";
+};
+
 // Bluetooth
 &sai0 {
     #sound-dai-cells = <0>;