1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/iio/potentiostat/ti,lmp91000.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Texas Instruments LMP91000 series of potentiostats with I2C control 8 9maintainers: 10 - Matt Ranostay <matt.ranostay@konsulko.com> 11 12description: | 13 Typically used as a signal conditioner for chemical sensors. 14 LMP91000: https://www.ti.com/lit/ds/symlink/lmp91000.pdf 15 LMP91002: https://www.ti.com/lit/ds/symlink/lmp91002.pdf 16 17properties: 18 compatible: 19 enum: 20 - ti,lmp91000 21 - ti,lmp91002 22 23 reg: 24 maxItems: 1 25 26 io-channels: 27 maxItems: 1 28 29 ti,external-tia-resistor: 30 $ref: /schemas/types.yaml#/definitions/flag 31 description: 32 If the property ti,tia-gain-ohm is not defined this needs to be set to 33 signal that an external resistor value is being used. 34 35 ti,tia-gain-ohm: 36 $ref: /schemas/types.yaml#/definitions/uint32 37 enum: [2750, 3500, 7000, 14000, 35000, 120000, 350000] 38 description: 39 Internal resistor for the transimpedance amplifier. 40 41 ti,rload-ohm: 42 $ref: /schemas/types.yaml#/definitions/uint32 43 enum: [10, 33, 50, 100] 44 description: 45 Internal resistor load applied to the gas sensor. 46 Default 100 Ohms. 47 48required: 49 - compatible 50 - reg 51 - io-channels 52 53additionalProperties: false 54 55examples: 56 - | 57 i2c { 58 #address-cells = <1>; 59 #size-cells = <0>; 60 lmp91000@48 { 61 compatible = "ti,lmp91000"; 62 reg = <0x48>; 63 ti,tia-gain-ohm = <7000>; 64 ti,rload-ohm = <100>; 65 io-channels = <&adc>; 66 }; 67 }; 68... 69