samples: peripheral: lpuart: Enable sample on PCA10197

Add overlay required to run the sample on [email protected]
available on PCA10197.

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

Author: nordic-segl

samples/peripheral/lpuart/boards/nrf54lm20apdk_nrf54lm20a_cpuapp.overlay

@@ -1,17 +1,22 @@
 /* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause */
 
+/* Two GPIO loopbacks are required:
+ * Request-Response Pins: P1.15 - P1.16,
+ * UART RX-TX Pins: P1.18 - P1.24
+ */
+
 &pinctrl {
 	uart21_default_alt: uart21_default_alt {
 		group1 {
-			psels = <NRF_PSEL(UART_RX, 1, 10)>,
-				<NRF_PSEL(UART_TX, 1, 11)>;
+			psels = <NRF_PSEL(UART_RX, 1, 18)>,
+				<NRF_PSEL(UART_TX, 1, 24)>;
 		};
 	};
 
 	uart21_sleep_alt: uart21_sleep_alt {
 		group1 {
-			psels = <NRF_PSEL(UART_RX, 1, 10)>,
-				<NRF_PSEL(UART_TX, 1, 11)>;
+			psels = <NRF_PSEL(UART_RX, 1, 18)>,
+				<NRF_PSEL(UART_TX, 1, 24)>;
 			low-power-enable;
 		};
 	};
@@ -26,8 +31,8 @@
 	lpuart: nrf-sw-lpuart {
 		compatible = "nordic,nrf-sw-lpuart";
 		status = "okay";
-		req-pin = <40>;
-		rdy-pin = <41>;
+		req-pin = <47>;
+		rdy-pin = <48>;
 	};
 };
 

samples/peripheral/lpuart/boards/nrf54lm20apdk_nrf54lm20a_cpuapp_0_0_0.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

@@ -26,6 +26,7 @@ tests:
       - nrf54l09pdk/nrf54l09/cpuapp
       - nrf54lv10apdk/nrf54lv10a/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf52dk/nrf52832
       - nrf52833dk/nrf52833
@@ -59,6 +60,7 @@ tests:
       - nrf54l09pdk/nrf54l09/cpuapp
       - nrf54lv10apdk/nrf54lv10a/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf52840dk/nrf52840
     extra_configs:
@@ -109,6 +111,7 @@ tests:
       - nrf54l09pdk/nrf54l09/cpuapp
       - nrf54lv10apdk/nrf54lv10a/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     tags: ppk_power_measure
     harness: pytest
     harness_config:
@@ -149,6 +152,7 @@ tests:
       - nrf54l09pdk/nrf54l09/cpuapp
       - nrf54lv10apdk/nrf54lv10a/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     harness: console
     harness_config:
       fixture: gpio_loopback