samples: peripheral: lpuart: Enable test execution on nrf54l20pdk

Add overlays needed to execute lpuart tests on nrf54l20pdk.

Signed-off-by: Sebastian Głąb <[email protected]>

Author: nordic-segl

samples/peripheral/lpuart/boards/nrf54l20pdk_nrf54l20_cpuapp.conf

@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+CONFIG_UART_21_ASYNC=y
+CONFIG_UART_21_INTERRUPT_DRIVEN=n
+# Do not use interrupt driven API for console UART to not enable RX.
+CONFIG_UART_20_INTERRUPT_DRIVEN=n

samples/peripheral/lpuart/boards/nrf54l20pdk_nrf54l20_cpuapp.overlay

@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause */
+
+&pinctrl {
+	uart21_default_alt: uart21_default_alt {
+		group1 {
+			psels = <NRF_PSEL(UART_RX, 1, 10)>,
+				<NRF_PSEL(UART_TX, 1, 11)>;
+		};
+	};
+
+	uart21_sleep_alt: uart21_sleep_alt {
+		group1 {
+			psels = <NRF_PSEL(UART_RX, 1, 10)>,
+				<NRF_PSEL(UART_TX, 1, 11)>;
+			low-power-enable;
+		};
+	};
+};
+
+&uart21 {
+	status = "okay";
+	pinctrl-0 = <&uart21_default_alt>;
+	pinctrl-1 = <&uart21_sleep_alt>;
+	pinctrl-names = "default", "sleep";
+	current-speed = <115200>;
+	lpuart: nrf-sw-lpuart {
+		compatible = "nordic,nrf-sw-lpuart";
+		status = "okay";
+		req-pin = <40>;
+		rdy-pin = <41>;
+	};
+};
+
+&gpiote20 {
+	status = "okay";
+};
+
+&uart20_default {
+	/* Disconnect CTS and RTS lines from pins.
+	 * This is a workaround for increased current consumption
+	 * (~250 uA more).
+	 */
+	group1 {
+		psels = <NRF_PSEL(UART_TX, 1, 4)>,
+			<NRF_PSEL_DISCONNECTED(UART_RTS)>;
+	};
+	group2 {
+		psels = <NRF_PSEL(UART_RX, 1, 5)>,
+			<NRF_PSEL_DISCONNECTED(UART_CTS)>;
+		bias-pull-up;
+	};
+};

samples/peripheral/lpuart/sample.yaml

@@ -18,6 +18,7 @@ tests:
       - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l20pdk/nrf54l20/cpuapp
     integration_platforms:
       - nrf52dk/nrf52832
       - nrf52833dk/nrf52833
@@ -28,6 +29,7 @@ tests:
       - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l20pdk/nrf54l20/cpuapp
     platform_exclude: native_sim
     tags: ppk_power_measure
     harness: pytest
@@ -47,6 +49,7 @@ tests:
       - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l20pdk/nrf54l20/cpuapp
     integration_platforms:
       - nrf52840dk/nrf52840
     extra_configs:
@@ -83,9 +86,10 @@ tests:
       - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l20pdk/nrf54l20/cpuapp
     platform_allow: nrf52dk/nrf52832 nrf52833dk/nrf52833 nrf52840dk/nrf52840 nrf9160dk/nrf9160/ns
       nrf5340dk/nrf5340/cpuapp nrf21540dk/nrf52840 nrf54l15dk/nrf54l05/cpuapp
-      nrf54l15dk/nrf54l10/cpuapp nrf54l15dk/nrf54l15/cpuapp
+      nrf54l15dk/nrf54l10/cpuapp nrf54l15dk/nrf54l15/cpuapp nrf54l20pdk/nrf54l20/cpuapp
     tags: ppk_power_measure
     harness: pytest
     harness_config:
@@ -112,9 +116,10 @@ tests:
       - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l20pdk/nrf54l20/cpuapp
     platform_allow: nrf52dk/nrf52832 nrf52833dk/nrf52833 nrf52840dk/nrf52840 nrf9160dk/nrf9160/ns
       nrf5340dk/nrf5340/cpuapp nrf21540dk/nrf52840 nrf54l15dk/nrf54l05/cpuapp
-      nrf54l15dk/nrf54l10/cpuapp nrf54l15dk/nrf54l15/cpuapp
+      nrf54l15dk/nrf54l10/cpuapp nrf54l15dk/nrf54l15/cpuapp nrf54l20pdk/nrf54l20/cpuapp
     harness: console
     harness_config:
       fixture: gpio_loopback