boards: renesas: add support for i2c sci driver on Renesas RA boards

Enable support of i2c sci driver on these boards: ek_ra6m5,
ek_ra6m4

Signed-off-by: Khai Cao <[email protected]>

Author: khaicaorvc

boards/renesas/ek_ra6m4/ek_ra6m4-pinctrl.dtsi

@@ -12,6 +12,15 @@
 		};
 	};
 
+	sci2_default: sci2_default {
+		group1 {
+			/* sda scl */
+			psels = <RA_PSEL(RA_PSEL_SCI_2, 1, 12)>,<RA_PSEL(RA_PSEL_SCI_2, 1, 13)>;
+			drive-strength = "medium";
+			drive-open-drain;
+		};
+	};
+
 	sci7_default: sci7_default {
 		group1 {
 			/* tx rx */

boards/renesas/ek_ra6m4/ek_ra6m4.dts

@@ -133,6 +133,17 @@
 	};
 };
 
+&sci2 {
+	pinctrl-0 = <&sci2_default>;
+	pinctrl-names = "default";
+
+	i2c2: i2c {
+		sda-output-delay = <300>;
+		noise-filter-clock-select = <1>;
+		bit-rate-modulation;
+	};
+};
+
 &sci7 {
 	pinctrl-0 = <&sci7_default>;
 	pinctrl-names = "default";

boards/renesas/ek_ra6m5/ek_ra6m5-pinctrl.dtsi

@@ -12,6 +12,15 @@
 		};
 	};
 
+	sci2_default: sci2_default {
+		group1 {
+			/* sda scl */
+			psels = <RA_PSEL(RA_PSEL_SCI_2, 1, 12)>,<RA_PSEL(RA_PSEL_SCI_2, 1, 13)>;
+			drive-strength = "medium";
+			drive-open-drain;
+		};
+	};
+
 	sci7_default: sci7_default {
 		group1 {
 			/* tx rx */

boards/renesas/ek_ra6m5/ek_ra6m5.dts

@@ -133,6 +133,17 @@
 	};
 };
 
+&sci2 {
+	pinctrl-0 = <&sci2_default>;
+	pinctrl-names = "default";
+
+	i2c2: i2c {
+		sda-output-delay = <300>;
+		noise-filter-clock-select = <1>;
+		bit-rate-modulation;
+	};
+};
+
 &sci7 {
 	pinctrl-0 = <&sci7_default>;
 	pinctrl-names = "default";