From bb381005b8a01b38995ff70925da50a19c13ada2 Mon Sep 17 00:00:00 2001
From: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>
Date: Fri, 24 Jan 2025 11:15:30 +0100
Subject: [PATCH] samples: drivers: adc: adc_dt: Add overlay for xg24_rb4187c

Add support for xg24_rb4187c to the ADC sample app. Configure two
channels, one measuring the AVDD supply against the 1.21V bandgap
reference, and one measuring pin PB1 (wired to button 0) against
the AVDD (VDDX) reference.

Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>
---
 .../adc/adc_dt/boards/xg24_rb4187c.overlay    | 50 +++++++++++++++++++
 samples/drivers/adc/adc_dt/sample.yaml        |  1 +
 2 files changed, 51 insertions(+)
 create mode 100644 samples/drivers/adc/adc_dt/boards/xg24_rb4187c.overlay

diff --git a/samples/drivers/adc/adc_dt/boards/xg24_rb4187c.overlay b/samples/drivers/adc/adc_dt/boards/xg24_rb4187c.overlay
new file mode 100644
index 00000000000..6ab6c25219f
--- /dev/null
+++ b/samples/drivers/adc/adc_dt/boards/xg24_rb4187c.overlay
@@ -0,0 +1,50 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2025 Silicon Laboratories Inc.
+ */
+
+#include <dt-bindings/pinctrl/silabs/xg24-pinctrl.h>
+#include <dt-bindings/adc/silabs-adc.h>
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 3>, <&adc0 4>;
+	};
+};
+
+&pinctrl {
+	adc0_default: adc0_default {
+		group0 {
+			/* Allocate odd bus 0 on GPIO port B to IADC for access to pin PB1 */
+			silabs,analog-bus = <ABUS_BODD0_IADC0>;
+		};
+	};
+};
+
+&adc0 {
+	pinctrl-0 = <&adc0_default>;
+	pinctrl-names = "default";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	channel@3 {
+		reg = <3>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+		zephyr,input-positive = <IADC_INPUT_AVDD>;
+	};
+
+	channel@4 {
+		reg = <4>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_VDD_1";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+		zephyr,input-positive = <IADC_INPUT_PB1>;
+	};
+};
diff --git a/samples/drivers/adc/adc_dt/sample.yaml b/samples/drivers/adc/adc_dt/sample.yaml
index a855a3f5238..f686b8edcb5 100644
--- a/samples/drivers/adc/adc_dt/sample.yaml
+++ b/samples/drivers/adc/adc_dt/sample.yaml
@@ -35,6 +35,7 @@ tests:
       - frdm_mcxn947/mcxn947/cpu0
       - frdm_mcxc242
       - ucans32k1sic
+      - xg24_rb4187c
     integration_platforms:
       - nucleo_l073rz
       - nrf52840dk/nrf52840