From 8cf71d091e1bb4cf4f3ad96bce5097e958d87fe1 Mon Sep 17 00:00:00 2001
From: Sudarsan N <sudarsansamy2002@gmail.com>
Date: Wed, 21 May 2025 14:26:55 +0530
Subject: [PATCH] samples: adc_dt: add overlay for STM32F0-DISCO

Add board-specific overlay file for the adc_dt sample
on the STM32F0-DISCO board to enable ADC channel support.

Signed-off-by: Sudarsan N <sudarsansamy2002@gmail.com>
---
 boards/st/stm32f0_disco/stm32f0_disco.dts     |  8 +++++
 boards/st/stm32f0_disco/stm32f0_disco.yaml    |  1 +
 .../adc/adc_dt/boards/stm32f0_disco.overlay   | 32 +++++++++++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 samples/drivers/adc/adc_dt/boards/stm32f0_disco.overlay

diff --git a/boards/st/stm32f0_disco/stm32f0_disco.dts b/boards/st/stm32f0_disco/stm32f0_disco.dts
index d9400ca6140..e66f5a31711 100644
--- a/boards/st/stm32f0_disco/stm32f0_disco.dts
+++ b/boards/st/stm32f0_disco/stm32f0_disco.dts
@@ -53,6 +53,14 @@
 	};
 };
 
+&adc1 {
+	pinctrl-0 = <&adc_in0_pa0 &adc_in1_pa1>;
+	pinctrl-names = "default";
+	st,adc-clock-source = "SYNC";
+	st,adc-prescaler = <4>;
+	status = "okay";
+};
+
 &clk_lsi {
 	status = "okay";
 };
diff --git a/boards/st/stm32f0_disco/stm32f0_disco.yaml b/boards/st/stm32f0_disco/stm32f0_disco.yaml
index 0f351814295..4ccfa937398 100644
--- a/boards/st/stm32f0_disco/stm32f0_disco.yaml
+++ b/boards/st/stm32f0_disco/stm32f0_disco.yaml
@@ -8,4 +8,5 @@ toolchain:
 ram: 8
 supported:
   - watchdog
+  - adc
 vendor: st
diff --git a/samples/drivers/adc/adc_dt/boards/stm32f0_disco.overlay b/samples/drivers/adc/adc_dt/boards/stm32f0_disco.overlay
new file mode 100644
index 00000000000..fc83d6e93bd
--- /dev/null
+++ b/samples/drivers/adc/adc_dt/boards/stm32f0_disco.overlay
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2025 Sudarsan N
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/{
+	zephyr,user {
+		io-channels = <&adc1 0>, <&adc1 1>;
+	};
+};
+
+&adc1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};