drivers: adc: ad4114: add driver support

The AD4114 is a low power, low noise, 24-bit, sigma-delta ADC.
This driver allows to use it with the Zephyr ADC API. It uses
the continuous acquisition ADC feature.

This ADC allows many configutations, but this driver uses it as the
most generic way :
- each can channel can be enable or disable using the device
tree configuration
- configure two setups (one for unipolar inputs, one for bipolar inputs)
- use an external clock

Signed-off-by: Pierrick Curt <[email protected]>

Author: pcurt

drivers/adc/CMakeLists.txt

@@ -56,3 +56,4 @@ zephyr_library_sources_ifdef(CONFIG_ADC_MCUX_GAU	adc_mcux_gau_adc.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_AMBIQ           adc_ambiq.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_RENESAS_RA	adc_renesas_ra.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_MAX32		adc_max32.c)
+zephyr_library_sources_ifdef(CONFIG_ADC_AD4114      adc_ad4114.c)

drivers/adc/Kconfig

@@ -136,4 +136,6 @@ source "drivers/adc/Kconfig.renesas_ra"
 
 source "drivers/adc/Kconfig.max32"
 
+source "drivers/adc/Kconfig.ad4114"
+
 endif # ADC

drivers/adc/Kconfig.ad4114

@@ -0,0 +1,25 @@
+# Copyright (c) 2023 Grinn
+# SPDX-License-Identifier: Apache-2.0
+
+config ADC_AD4114
+	bool "AD4114 ADC driver"
+	default y
+	depends on DT_HAS_ADI_AD4114_ADC_ENABLED
+	select SPI
+	help
+	  Enable the AD4114 ADC driver.
+
+config ADC_AD4114_ACQUISITION_THREAD_STACK_SIZE
+	int "Stack size for the ADC data acquisition thread"
+	depends on ADC_AD4114
+	default 512
+	help
+	  Size of the stack used for the internal data acquisition
+	  thread.
+
+config ADC_AD4114_ACQUISITION_THREAD_PRIO
+	int "Priority for the ADC data acquisition thread"
+	depends on ADC_AD4114
+	default 0
+	help
+	  Priority level for the internal ADC data acquisition thread.