tests: drivers: uart: async_api: Add nrf54h20 support

Add overlays for nrf54h20dk.

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

tests/drivers/uart/uart_async_api/boards/nrf54h20dk_nrf54h20_common.dtsi

@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&pinctrl {
+	uart137_default_alt: uart137_default_alt {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 6)>,
+				<NRF_PSEL(UART_RX, 0, 7)>;
+		};
+	};
+
+	uart137_sleep_alt: uart137_sleep_alt {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 6)>,
+				<NRF_PSEL(UART_RX, 0, 7)>;
+			low-power-enable;
+		};
+	};
+};
+
+dut: &uart137 {
+	status = "okay";
+	pinctrl-0 = <&uart137_default_alt>;
+	pinctrl-1 = <&uart137_sleep_alt>;
+	pinctrl-names = "default", "sleep";
+	current-speed = <115200>;
+};

tests/drivers/uart/uart_async_api/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include "nrf54h20dk_nrf54h20_common.dtsi"
+
+&dut {
+	memory-regions = <&cpuapp_dma_region>;
+};

tests/drivers/uart/uart_async_api/boards/nrf54h20dk_nrf54h20_cpurad.overlay

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include "nrf54h20dk_nrf54h20_common.dtsi"
+
+&dut {
+	memory-regions = <&cpurad_dma_region>;
+};