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Commit 67e17300 authored by Matt Ranostay's avatar Matt Ranostay Committed by Jonathan Cameron
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iio: potentiostat: add LMP91000 support 



Add support for the LMP91000 potentiostat which is used for chemical
sensing applications.

Signed-off-by: default avatarMatt Ranostay <matt@ranostay.consulting>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 92f0afb5

Documentation/devicetree/bindings/iio/potentiostat/lmp91000.txt

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* Texas Instruments LMP91000 potentiostat



http://www.ti.com/lit/ds/symlink/lmp91000.pdf



Required properties:



  - compatible: should be "ti,lmp91000"

  - reg: the I2C address of the device

  - io-channels: the phandle of the iio provider



  - ti,external-tia-resistor: if the property ti,tia-gain-ohm is not defined this

    needs to be set to signal that an external resistor value is being used.



Optional properties:



  - ti,tia-gain-ohm: ohm value of the internal resistor for the transimpedance

    amplifier. Must be 2750, 3500, 7000, 14000, 35000, 120000, or 350000 ohms.



  - ti,rload-ohm: ohm value of the internal resistor load applied to the gas

    sensor. Must be 10, 33, 50, or 100 (default) ohms.



Example:



lmp91000@48 {

	compatible = "ti,lmp91000";

	reg = <0x48>;

	ti,tia-gain-ohm = <7500>;

	ti,rload = <100>;

	io-channels = <&adc>;

};

drivers/iio/Kconfig

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@@ -87,6 +87,7 @@ if IIO_TRIGGER 
   source "drivers/iio/trigger/Kconfig"

endif #IIO_TRIGGER

source "drivers/iio/potentiometer/Kconfig"

source "drivers/iio/potentiostat/Kconfig"

source "drivers/iio/pressure/Kconfig"

source "drivers/iio/proximity/Kconfig"

source "drivers/iio/temperature/Kconfig"

drivers/iio/Makefile

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@@ -29,6 +29,7 @@ obj-y += light/ 
obj-y += magnetometer/

obj-y += orientation/

obj-y += potentiometer/

obj-y += potentiostat/

obj-y += pressure/

obj-y += proximity/

obj-y += temperature/

drivers/iio/potentiostat/Kconfig

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#

# Potentiostat drivers

#

# When adding new entries keep the list in alphabetical order



menu "Digital potentiostats"



config LMP91000

	tristate "Texas Instruments LMP91000 potentiostat driver"

	depends on I2C

	select REGMAP_I2C

	select IIO_BUFFER

	select IIO_BUFFER_CB

	select IIO_TRIGGERED_BUFFER

	help

	  Say yes here to build support for the Texas Instruments

	  LMP91000 digital potentiostat chip.



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

	  module will be called lmp91000



endmenu

drivers/iio/potentiostat/Makefile

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#

# Makefile for industrial I/O potentiostat drivers

#



# When adding new entries keep the list in alphabetical order

obj-$(CONFIG_LMP91000) += lmp91000.o