From 07b4362bac120116fdfab2969fd697a0669671eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrzej=20G=C5=82=C4=85bek?= <andrzej.glabek@nordicsemi.no>
Date: Mon, 21 Feb 2022 17:29:46 +0100
Subject: [PATCH] samples/drivers/adc: Add support for nRF52840 DK and nRF51 DK
 boards
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The overlay for the nRF52840 DK board uses ADC controller child nodes
for specifying channel configurations and it shows how to configure
a channel in differential input mode, so it can serve as an example
of how to use these new possibilities. The overlay for the nRF51 DK
board shows how to use a specific ADC resolution (the default 12 bit
setting is not supported by nRF51 SoCs).

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
---
 .../adc/boards/nrf51dk_nrf51422.overlay       | 26 +++++++++++
 .../adc/boards/nrf52840dk_nrf52840.overlay    | 45 +++++++++++++++++++
 samples/drivers/adc/sample.yaml               |  5 ++-
 3 files changed, 75 insertions(+), 1 deletion(-)
 create mode 100644 samples/drivers/adc/boards/nrf51dk_nrf51422.overlay
 create mode 100644 samples/drivers/adc/boards/nrf52840dk_nrf52840.overlay

diff --git a/samples/drivers/adc/boards/nrf51dk_nrf51422.overlay b/samples/drivers/adc/boards/nrf51dk_nrf51422.overlay
new file mode 100644
index 00000000000..9b6d5301ad1
--- /dev/null
+++ b/samples/drivers/adc/boards/nrf51dk_nrf51422.overlay
@@ -0,0 +1,26 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ */
+
+
+/ {
+	zephyr,user {
+		io-channels = <&adc 0>;
+	};
+};
+
+&adc {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_3";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_ADC_AIN2>; /* P0.01 */
+		zephyr,resolution = <10>;
+	};
+};
diff --git a/samples/drivers/adc/boards/nrf52840dk_nrf52840.overlay b/samples/drivers/adc/boards/nrf52840dk_nrf52840.overlay
new file mode 100644
index 00000000000..2036ad74430
--- /dev/null
+++ b/samples/drivers/adc/boards/nrf52840dk_nrf52840.overlay
@@ -0,0 +1,45 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ */
+
+
+/ {
+	zephyr,user {
+		io-channels = <&adc 0>, <&adc 1>, <&adc 7>;
+	};
+};
+
+&adc {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_6";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_AIN1>; /* P0.03 */
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1_6";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_VDD>;
+		zephyr,resolution = <14>;
+		zephyr,oversampling = <8>;
+	};
+
+	channel@7 {
+		reg = <7>;
+		zephyr,gain = "ADC_GAIN_1_5";
+		zephyr,reference = "ADC_REF_VDD_1_4";
+		zephyr,vref-mv = <750>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,input-positive = <NRF_SAADC_AIN6>; /* P0.30 */
+		zephyr,input-negative = <NRF_SAADC_AIN7>; /* P0.31 */
+	};
+};
diff --git a/samples/drivers/adc/sample.yaml b/samples/drivers/adc/sample.yaml
index ed0503cb8f6..c643de513ce 100644
--- a/samples/drivers/adc/sample.yaml
+++ b/samples/drivers/adc/sample.yaml
@@ -5,7 +5,10 @@ tests:
     tags: ADC
     depends_on: adc
     platform_allow: nucleo_l073rz disco_l475_iot1 cc3220sf_launchxl
-        cc3235sf_launchxl stm32l496g_disco
+        cc3235sf_launchxl stm32l496g_disco nrf51dk_nrf51422 nrf52840dk_nrf52840
+    integration_platforms:
+      - nucleo_l073rz
+      - nrf52840dk_nrf52840
     harness: console
     timeout: 10
     harness_config: