diff --git a/samples/drivers/adc/boards/atsame54_xpro.overlay b/samples/drivers/adc/boards/atsame54_xpro.overlay
new file mode 100644
index 00000000000..5d3a5192f5e
--- /dev/null
+++ b/samples/drivers/adc/boards/atsame54_xpro.overlay
@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2021 Gerson Fernando Budke <nandojve@gmail.com>
+ */
+
+/ {
+	zephyr,user {
+		/* EXT-1 ADC(+) */
+		io-channels = <&adc1 6>;
+	};
+};
diff --git a/samples/drivers/adc/boards/atsamr21_xpro.overlay b/samples/drivers/adc/boards/atsamr21_xpro.overlay
new file mode 100644
index 00000000000..1b9f41e23b1
--- /dev/null
+++ b/samples/drivers/adc/boards/atsamr21_xpro.overlay
@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2021 Gerson Fernando Budke <nandojve@gmail.com>
+ */
+
+/ {
+	zephyr,user {
+		/* EXT-1 ADC(+) */
+		io-channels = <&adc 6>;
+	};
+};