iio: adc: ti-ads1119: Add driver

The ADS1119 is a precision, 16-bit, analog-to-digital converter (ADC)
that features two differential or four single-ended inputs through a
flexible input multiplexer (MUX), rail-to-rail input
buffers, a programmable gain stage, a voltage reference, and an
oscillator.

Apart from normal single conversion, the driver also supports
continuous conversion mode using a triggered buffer. However, in this
mode only one channel can be scanned at a time.

Datasheet: https://www.ti.com/lit/gpn/ads1119
Signed-off-by: João Paulo Gonçalves <joao.goncalves@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20240617183905.4685-1-francesco@dolcini.it
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

MAINTAINERS

@@ -22403,6 +22403,7 @@ M:	João Paulo Gonçalves <jpaulo.silvagoncalves@gmail.com>
 L:	linux-iio@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/iio/adc/ti,ads1119.yaml
+F:	drivers/iio/adc/ti-ads1119.c
 
 TI ADS7924 ADC DRIVER
 M:	Hugo Villeneuve <hvilleneuve@dimonoff.com>

drivers/iio/adc/Kconfig

@@ -1351,6 +1351,18 @@ config TI_ADS1015
 	  This driver can also be built as a module. If so, the module will be
 	  called ti-ads1015.
 
+config TI_ADS1119
+       tristate "Texas Instruments ADS1119 ADC"
+       depends on I2C
+       select IIO_BUFFER
+       select IIO_TRIGGERED_BUFFER
+       help
+         If you say yes here you get support for Texas Instruments ADS1119
+         ADC chip.
+
+         This driver can also be built as a module. If so, the module will be
+         called ti-ads1119.
+
 config TI_ADS7924
 	tristate "Texas Instruments ADS7924 ADC"
 	depends on I2C

drivers/iio/adc/Makefile

@@ -121,6 +121,7 @@ obj-$(CONFIG_TI_ADC128S052) += ti-adc128s052.o
 obj-$(CONFIG_TI_ADC161S626) += ti-adc161s626.o
 obj-$(CONFIG_TI_ADS1015) += ti-ads1015.o
 obj-$(CONFIG_TI_ADS1100) += ti-ads1100.o
+obj-$(CONFIG_TI_ADS1119) += ti-ads1119.o
 obj-$(CONFIG_TI_ADS124S08) += ti-ads124s08.o
 obj-$(CONFIG_TI_ADS1298) += ti-ads1298.o
 obj-$(CONFIG_TI_ADS131E08) += ti-ads131e08.o