boards: raspberrypi: rpi5: Add configuration for using SWD connector

Add a configuration to use UART0 for the console
and make able to use the connector shared by SWD and UART10
for SWD purposes.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

Author: soburi

boards/raspberrypi/rpi_5/board.yml

@@ -4,3 +4,5 @@ board:
   vendor: raspberrypi
   socs:
   - name: bcm2712
+    variants:
+    - name: swd

boards/raspberrypi/rpi_5/rpi_5_bcm2712_swd-pinctrl.dtsi

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 TOKITA Hiroshi
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "rpi_5-pinctrl.dtsi"
+
+&rp1_pinctrl {
+	rp1_uart0_default: rp1_uart0_default {
+		group1 {
+			pinmux = <RP1_UART0_TX_P14>;
+		};
+
+		group2 {
+			pinmux = <RP1_UART0_RX_P15>;
+			input-enable;
+			input-schmitt-enable;
+			bias-pull-up;
+		};
+	};
+};

boards/raspberrypi/rpi_5/rpi_5_bcm2712_swd.dts

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2025 TOKITA Hiroshi
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "rpi_5_bcm2712.dts"
+#include "rpi_5_bcm2712_swd-pinctrl.dtsi"
+
+/ {
+	chosen {
+		zephyr,console = &rp1_uart0;
+		zephyr,shell-uart = &rp1_uart0;
+	};
+};
+
+&rp1_uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&rp1_uart0_default>;
+	pinctrl-names = "default";
+};
+
+&uart10 {
+	status = "disabled";
+};

boards/raspberrypi/rpi_5/rpi_5_bcm2712_swd.yaml

@@ -0,0 +1,7 @@
+identifier: rpi_5/bcm2712/swd
+name: Raspberry Pi 5 SWD-enabled
+type: mcu
+arch: arm64
+toolchain:
+  - zephyr
+  - cross-compile

boards/raspberrypi/rpi_5/rpi_5_bcm2712_swd_defconfig

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ARM64_VA_BITS_40=y
+CONFIG_ARM64_PA_BITS_40=y
+CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME=y
+
+# Enable serial console.
+CONFIG_SERIAL=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+CONFIG_SHELL_BACKEND_SERIAL_INTERRUPT_DRIVEN=n
+
+CONFIG_PCIE=y