| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | |
| 7 | title: Texas Instruments LMP91000 series of potentiostats with I2C control |
| 8 | |
| 9 | maintainers: |
| 10 | - Matt Ranostay <matt.ranostay@konsulko.com> |
| 11 | |
| 12 | description: | |
| 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 | |
| 17 | properties: |
| 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 | |
| 48 | required: |
| 49 | - compatible |
| 50 | - reg |
| 51 | - io-channels |
| 52 | |
| 53 | additionalProperties: false |
| 54 | |
| 55 | examples: |
| 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 | ... |