From 6dd54c8835d5400b3861a30d56fabb1573875dc0 Mon Sep 17 00:00:00 2001
From: Richard Wheatley <richard.wheatley@ambiq.com>
Date: Thu, 22 Aug 2024 12:44:48 -0500
Subject: [PATCH] dts: arm: ambiq: add ambiq adc to dtsi file

Add Ambiq adc to apollo4 DTSI

Signed-off-by: Richard Wheatley <richard.wheatley@ambiq.com>
---
 dts/arm/ambiq/ambiq_apollo4p.dtsi | 12 ++++++++++++
 modules/hal_ambiq/Kconfig         |  5 +++++
 2 files changed, 17 insertions(+)

diff --git a/dts/arm/ambiq/ambiq_apollo4p.dtsi b/dts/arm/ambiq/ambiq_apollo4p.dtsi
index 6570e20c9ccb..bfd25825fa0d 100644
--- a/dts/arm/ambiq/ambiq_apollo4p.dtsi
+++ b/dts/arm/ambiq/ambiq_apollo4p.dtsi
@@ -3,6 +3,7 @@
 #include <arm/armv7-m.dtsi>
 #include <mem.h>
 #include <freq.h>
+#include <zephyr/dt-bindings/adc/adc.h>
 #include <zephyr/dt-bindings/i2c/i2c.h>
 #include <zephyr/dt-bindings/gpio/gpio.h>
 
@@ -288,6 +289,17 @@
 			ambiq,pwrcfg = <&pwrcfg 0x4 0x100>;
 		};
 
+		adc0: adc@40038000 {
+			reg = <0x40038000 0x400>;
+			interrupts = <19 0>;
+			interrupt-names = "ADC";
+			channel-count = <10>;
+			internal-vref-mv = <1190>;
+			status = "disabled";
+			#io-channel-cells = <1>;
+			ambiq,pwrcfg = <&pwrcfg 0x4 0x2000>;
+		};
+
 		mspi0: spi@40060000 {
 			compatible = "ambiq,mspi";
 			reg = <0x40060000 0x400>;
diff --git a/modules/hal_ambiq/Kconfig b/modules/hal_ambiq/Kconfig
index 326d6bac2d45..a9a7e47e7843 100644
--- a/modules/hal_ambiq/Kconfig
+++ b/modules/hal_ambiq/Kconfig
@@ -10,6 +10,11 @@ config AMBIQ_HAL
 
 if AMBIQ_HAL
 
+config AMBIQ_HAL_USE_ADC
+	bool
+	help
+	  Use the ADC driver from Ambiq HAL
+
 config AMBIQ_HAL_USE_GPIO
 	bool
 	help