arm64: dts: renesas: r9a08g046l48-smarc: Enable I2C{2,3} devices

Enable I2C{2,3} on the RZ/G3L SMARC EVK board.  I2C3 is enabled by
setting SW SYS.2 to the OFF position.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20260528070239.33352-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: bijudas

arch/arm64/boot/dts/renesas/r9a08g046l48-smarc.dts

@@ -11,6 +11,7 @@
 #define RZ_BOOT_MODE3		1
 #define SW_DPI_EN		0
 #define SW_GPIO4		1
+#define SW_I3C_EN		0
 
 #define PMOD_GPIO4		0
 #define PMOD_GPIO6		0
@@ -33,10 +34,28 @@
 		     "renesas,r9a08g046l48", "renesas,r9a08g046";
 
 	aliases {
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
 		serial3 = &scif0;
 	};
 };
 
+&i2c2 {
+	pinctrl-0 = <&i2c2_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+#if !SW_I3C_EN
+&i2c3 {
+	pinctrl-0 = <&i2c3_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+#endif
+
 &keys {
 #if !RZ_BOOT_MODE3 || !SW_GPIO4 || PMOD_GPIO4
 	/delete-node/ key-1;
@@ -52,6 +71,16 @@
 };
 
 &pinctrl {
+	i2c2_pins: i2c2 {
+		pinmux = <RZG3L_PORT_PINMUX(A, 4, 4)>, /* RIIC2_SCL */
+			 <RZG3L_PORT_PINMUX(A, 5, 4)>; /* RIIC2_SDA */
+	};
+
+	i2c3_pins: i2c3 {
+		pinmux = <RZG3L_PORT_PINMUX(2, 0, 4)>, /* RIIC3_SCL */
+			 <RZG3L_PORT_PINMUX(2, 1, 4)>; /* RIIC3_SDA */
+	};
+
 	scif0_pins: scif0 {
 		pins = "SCIF0_TXD", "SCIF0_RXD";
 		power-source = <1800>;

arch/arm64/boot/dts/renesas/rzg3l-smarc-som.dtsi

@@ -9,6 +9,10 @@
  * Please set the below switch position on the SoM and the corresponding macro
  * on the board DTS:
  *
+ * Switch position SYS.2, Macro SW_I3C_EN:
+ *      0 - SMARC_I2C_GP is enabled
+ *      1 - I3C is enabled
+ *
  * Switch position SYS.5, Macro SW_DPI_EN:
  *      0 - Select multiple SMARC signals active
  *      1 - Select LCD