boards: sparkfun: Add SPI support over EUSART in devicetree

Modified devicetree to integrate support for EUSART in pincontrol settings.

Signed-off-by: Teresa Zepeda Ventura <teresa.zvent@gmail.com>

boards/sparkfun/thing_plus_matter_mgm240p/board.c

@@ -51,6 +51,9 @@ static int sparkfun_thing_plus_mgm240p_init_clocks(void)
 #endif
 #if defined(_CMU_EM01GRPBCLKCTRL_MASK)
 	CMU_ClockSelectSet(cmuClock_EM01GRPBCLK, cmuSelect_HFRCODPLL);
+#endif
+#if defined(_CMU_EM01GRPCCLKCTRL_MASK)
+	CMU_ClockSelectSet(cmuClock_EM01GRPCCLK, cmuSelect_HFRCODPLL);
 #endif
 	CMU_ClockSelectSet(cmuClock_EM23GRPACLK, cmuSelect_LFRCO);
 	CMU_ClockSelectSet(cmuClock_EM4GRPACLK, cmuSelect_LFRCO);

boards/sparkfun/thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p-pinctrl.dtsi

@@ -18,6 +18,15 @@
 		};
 	};
 
+	eusart1_default: eusart1_default {
+		group1 {
+			psels = <GECKO_PSEL(SPI_SCK, C, 2)>,
+				<GECKO_PSEL(SPI_MISO, C, 3)>,
+				<GECKO_PSEL(SPI_MOSI, C, 6)>,
+				<GECKO_PSEL(SPI_CSN, A, 7)>;
+		};
+	};
+
 	i2c0_default: i2c0_default {
 		group1 {
 			psels = <GECKO_PSEL(I2C_SDA, B, 3)>,

boards/sparkfun/thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p.dts

@@ -25,6 +25,7 @@
 
 	aliases {
 		led0 = &blue_led;
+		spi0 = &eusart1;
 		watchdog0 = &wdog0;
 	};
 
@@ -53,6 +54,18 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&eusart1 {
+	compatible = "silabs,gecko-spi-eusart";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-0 = <&eusart1_default>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
 &i2c0 {
 	pinctrl-0 = <&i2c0_default>;
 	pinctrl-names = "default";

boards/sparkfun/thing_plus_matter_mgm240p/sparkfun_thing_plus_matter_mgm240p.yaml

@@ -14,6 +14,7 @@ supported:
   - uart
   - spi
   - watchdog
+  - clock_control
 testing:
   ignore_tags:
     - net

dts/arm/silabs/efr32mg24.dtsi

@@ -119,6 +119,23 @@
 			status = "disabled";
 		};
 
+		eusart0: eusart@5b010000 {
+			compatible = "silabs,gecko-spi-eusart";
+			reg = <0x5B010000 0x4000>;
+			interrupts = <11 0>, <12 0>;
+			interrupt-names = "rx", "tx";
+			clocks = <&cmu CLOCK_EUSART0 CLOCK_BRANCH_EUSART0CLK>;
+			status = "disabled";
+		};
+		eusart1: eusart@500a0000 {
+			compatible = "silabs,gecko-spi-eusart";
+			reg = <0x500A0000 0x4000>;
+			interrupts = <13 0>, <14 0>;
+			interrupt-names = "rx", "tx";
+			clocks = <&cmu CLOCK_EUSART1 CLOCK_BRANCH_EM01GRPCCLK>;
+			status = "disabled";
+		};
+
 		burtc0: burtc@50064000 {
 			compatible = "silabs,gecko-burtc";
 			reg = <0x50064000 0x3034>;