samples: drivers: adc: adc_sequence: Enable sample on nrf54lm20dk

Add overlay required to run the sample on
nrf54lm20dk/nrf54lm20a/cpuapp.

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

Author: nordic-segl

samples/drivers/adc/adc_sequence/boards/nrf54lm20dk_nrf54lm20a_cpuapp.overlay

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+/ {
+	aliases {
+		adc0 = &adc;
+	};
+};
+
+&adc {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_AIN4>; /* P1.06 */
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_AIN2>; /* P1.30 */
+	};
+
+	channel@2 {
+		reg = <2>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_DVDD>; /* 0.9 V internal */
+	};
+
+	channel@7 {
+		reg = <7>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_AIN6>; /* P1.04 */
+		zephyr,input-negative = <NRF_SAADC_AIN7>; /* P1.03 */
+	};
+};

samples/drivers/adc/adc_sequence/sample.yaml

@@ -18,8 +18,9 @@ tests:
       - cy8cproto_063_ble
       - cy8cproto_062_4343w
       - nrf52840dk/nrf52840
-      - nrf54l15dk/nrf54l15/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
       - ophelia4ev/nrf54l15/cpuapp
       - raytac_an54l15q_db/nrf54l15/cpuapp
       - ucans32k1sic
@@ -30,8 +31,9 @@ tests:
       - nrf52840dk/nrf52840
   sample.drivers.adc.adc_sequence.8bit:
     platform_allow:
-      - nrf54l15dk/nrf54l15/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     extra_configs: