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Commit 88bc3054 authored by Michael Hennerich's avatar Michael Hennerich Committed by Greg Kroah-Hartman
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IIO: ADC: New driver for AD7792/AD7793 3 Channel SPI ADC 



New driver for AD7792/AD7793 3-Channel, Low Noise,
Low Power, 16-/24-Bit Sigma-Delta ADC with On-Chip In-Amp
and Reference.

The AD7792/AD7793 features a dual use data out ready DOUT/RDY output.
In order to avoid contentions on the SPI bus, it's necessary to use
spi bus locking. The DOUT/RDY output must also be wired to an
interrupt capable GPIO.

In INDIO_RING_TRIGGERED mode, this driver may block its SPI bus segment
for an extended period of time.

Changes since V1:

Use bool where applicable.
Use data buffer that lives in their own cache line.
Restructure ad7793_calibrate_all to use an array.
Use msleep.
Query REG_ID instead of doing a write/read This is a test.
Add support for unipolar mode.
Drop range attribute in favor of write scale.
Add proper locking.
Use new validate_trigger callbacks.
Use IIO_IN_DIFF for differential channels.
Change attribute naming.
Use available_scan_masks.
Some other miscellaneous cleanup (none functional changes).

Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Acked-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 3fd47d44

drivers/staging/iio/adc/Kconfig

+14 −0
Original line number Original line Diff line number Diff line
@@ -130,6 +130,20 @@ config AD7780 
	  To compile this driver as a module, choose M here: the

	  To compile this driver as a module, choose M here: the

	  module will be called ad7780.

	  module will be called ad7780.





config AD7793

	tristate "Analog Devices AD7792 AD7793 ADC driver"

	depends on SPI

	select IIO_RING_BUFFER

	select IIO_SW_RING

	select IIO_TRIGGER

	help

	  Say yes here to build support for Analog Devices

	  AD7792 and AD7793 SPI analog to digital convertors (ADC).

	  If unsure, say N (but it's safe to say "Y").



	  To compile this driver as a module, choose M here: the

	  module will be called AD7793.



config AD7745

config AD7745

	tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"

	tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"

	depends on I2C

	depends on I2C

drivers/staging/iio/adc/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -35,6 +35,7 @@ obj-$(CONFIG_AD7291) += ad7291.o 
obj-$(CONFIG_AD7314) += ad7314.o

obj-$(CONFIG_AD7314) += ad7314.o

obj-$(CONFIG_AD7745) += ad7745.o

obj-$(CONFIG_AD7745) += ad7745.o

obj-$(CONFIG_AD7780) += ad7780.o

obj-$(CONFIG_AD7780) += ad7780.o

obj-$(CONFIG_AD7793) += ad7793.o

obj-$(CONFIG_AD7816) += ad7816.o

obj-$(CONFIG_AD7816) += ad7816.o

obj-$(CONFIG_ADT75) += adt75.o

obj-$(CONFIG_ADT75) += adt75.o

obj-$(CONFIG_ADT7310) += adt7310.o

obj-$(CONFIG_ADT7310) += adt7310.o