iio: dac: Add AD5413 driver

Introduce AD5413 IIO DAC driver:
- guard(mutex) for locking
- dev_err_probe() on probe-path failures
- Unit-agnostic range tables (.min/.max) with designated initializers
- CRC disable/refactor via helpers and macros
- Wire into drivers/iio/dac/Kconfig and Makefile

Signed-off-by: Bruce Tsao <[email protected]>

Author: BruceTsaoADI

drivers/iio/dac/Kconfig

@@ -96,6 +96,16 @@ config AD5380
 	  To compile this driver as module choose M here: the module will be called
 	  ad5380.
 
+config AD5413
+	tristate "Analog Devices AD5413 DAC driver"
+	depends on SPI_MASTER
+	help
+	  Say yes here to build support for Analog Devices AD5413 single channel
+	  Digital to Analog Converter.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad5413.
+
 config AD5421
 	tristate "Analog Devices AD5421 DAC driver"
 	depends on SPI
@@ -597,5 +607,4 @@ config VF610_DAC
 
 	  This driver can also be built as a module. If so, the module will
 	  be called vf610_dac.
-
 endmenu

drivers/iio/dac/Makefile

@@ -11,6 +11,7 @@ obj-$(CONFIG_AD3552R) += ad3552r.o
 obj-$(CONFIG_AD5270) += ad5270.o
 obj-$(CONFIG_AD5360) += ad5360.o
 obj-$(CONFIG_AD5380) += ad5380.o
+obj-$(CONFIG_AD5413) += ad5413.o
 obj-$(CONFIG_AD5421) += ad5421.o
 obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
 obj-$(CONFIG_AD5064) += ad5064.o