adc: Add TI ADS7052 SPI driver

Add driver for TI ADS7052.

Signed-off-by: Al Semjonovs <asemjonovs@google.com>

Author: asemjonovs

boards/arm/tdk_robokit1/tdk_robokit1-common.dtsi

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <zephyr/dt-bindings/adc/adc.h>
 #include "tdk_robokit1-pinctrl.dtsi"
 
 / {
@@ -90,7 +91,8 @@
 	pinctrl-names = "default";
 	dmas = <&xdmac 0 DMA_PERID_SPI0_TX>, <&xdmac 1 DMA_PERID_SPI0_RX>;
 	dma-names = "tx", "rx";
-	cs-gpios =<&pioa 31 GPIO_ACTIVE_LOW>;
+	cs-gpios =<&pioa 31 GPIO_ACTIVE_LOW>,
+				<&pioc 31 GPIO_ACTIVE_LOW>;
 	status = "okay";
 
 	icm42688: icm42688p@0 {
@@ -103,6 +105,22 @@
 		gyro-hz = <32000>;
 		gyro-fs = <2000>;
 	};
+	spi_adc: adc@1 {
+		compatible = "ti,ads7052";
+		reg = <1>;
+		#io-channel-cells = <1>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		spi-max-frequency = <12000000>;
+		channel@0 {
+			reg = <0>;
+			zephyr,gain = "ADC_GAIN_1";
+			zephyr,reference = "ADC_REF_VDD_1";
+			zephyr,vref-mv = <3300>;
+			zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+			zephyr,resolution = <14>;
+		};
+	};
 };
 
 &spi1 {

drivers/adc/CMakeLists.txt

@@ -28,6 +28,7 @@ zephyr_library_sources_ifdef(CONFIG_ADC_TEST		adc_test.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_ADS1X1X		adc_ads1x1x.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_GD32		adc_gd32.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_ADS1119		adc_ads1119.c)
+zephyr_library_sources_ifdef(CONFIG_ADC_ADS7052		adc_ads7052.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_RPI_PICO	adc_rpi_pico.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_XMC4XXX		adc_xmc4xxx.c)
 zephyr_library_sources_ifdef(CONFIG_ADC_ESP32		adc_esp32.c)

drivers/adc/Kconfig

@@ -84,6 +84,8 @@ source "drivers/adc/Kconfig.gd32"
 
 source "drivers/adc/Kconfig.ads1119"
 
+source "drivers/adc/Kconfig.ads7052"
+
 source "drivers/adc/Kconfig.rpi_pico"
 
 source "drivers/adc/Kconfig.xmc4xxx"

drivers/adc/Kconfig.ads7052

@@ -0,0 +1,36 @@
+# Copyright (c) 2023 Google LLC
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config ADC_ADS7052
+	bool "Texas instruments ADS7052 SPI"
+	default y
+	depends on DT_HAS_TI_ADS7052_ENABLED
+	select SPI
+	select ADC_CONFIGURABLE_INPUTS
+	help
+	  Enable the driver implementation for the ADS7052
+
+if ADC_ADS7052
+
+config ADC_ADS7052_INIT_PRIORITY
+	int "ADS7052 init priority"
+	default 80
+	help
+	  ADS7052 device initialization priority must come
+	  after SPI initialization
+
+config ADC_ADS7052_ACQUISITION_THREAD_STACK_SIZE
+	int "Stack size for the ADC data acquisition thread"
+	default 512
+	help
+	  Size of the stack used for the internal data acquisition
+	  thread.
+
+config ADC_ADS7052_ACQUISITION_THREAD_PRIO
+	int "Priority for the ADC data acquisition thread"
+	default 0
+	help
+	  Priority level for the internal ADC data acquisition thread.
+
+endif # ADC_ADS7052