drivers: adc: add IADC support for silabs series 2 boards

This commit introduces a new driver for the silabs Incremental ADC (IADC).

Signed-off-by: Martin Hoff <[email protected]>

Author: Martinhoff-maker

drivers/adc/CMakeLists.txt

@@ -45,6 +45,7 @@ zephyr_library_sources_ifdef(CONFIG_ADC_XMC4XXX		adc_xmc4xxx.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_ESP32		adc_esp32.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_GECKO_ADC   	adc_gecko.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_GECKO_IADC   	iadc_gecko.c)
+zephyr_library_sources_ifdef(CONFIG_ADC_SILABS_IADC   	adc_silabs_iadc.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_SILABS_SIWX91X 	adc_silabs_siwx91x.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_INFINEON_CAT1	adc_ifx_cat1.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_SMARTBOND_GPADC adc_smartbond_gpadc.c)

drivers/adc/Kconfig

@@ -118,6 +118,8 @@ source "drivers/adc/Kconfig.gecko"
 
 source "drivers/adc/Kconfig.siwx91x"
 
+source "drivers/adc/Kconfig.silabs"
+
 source "drivers/adc/Kconfig.ifx_cat1"
 
 source "drivers/adc/Kconfig.smartbond"

drivers/adc/Kconfig.silabs

@@ -0,0 +1,11 @@
+# Copyright (c) 2025 Silicon Laboratories Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config ADC_SILABS_IADC
+	bool "Silabs Incremental ADC driver"
+	default y
+	depends on DT_HAS_SILABS_IADC_ENABLED
+	select SILABS_SISDK_IADC
+	select ADC_CONFIGURABLE_INPUTS
+	help
+	  Enable the driver implementation for Silabs Incremental ADC