| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters |
| 8 | |
| 9 | maintainers: |
| 10 | - Michael Hennerich <michael.hennerich@analog.com> |
| 11 | |
| 12 | description: | |
| 13 | The ad7780 is a sigma-delta analog to digital converter. This driver provides |
| 14 | reading voltage values and status bits from both the ad778x and ad717x series. |
| 15 | Its interface also allows writing on the FILTER and GAIN GPIO pins on the |
| 16 | ad778x. |
| 17 | |
| 18 | Specifications on the converters can be found at: |
| 19 | AD7170: |
| 20 | https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf |
| 21 | AD7171: |
| 22 | https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf |
| 23 | AD7780: |
| 24 | https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf |
| 25 | AD7781: |
| 26 | https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf |
| 27 | |
| 28 | properties: |
| 29 | compatible: |
| 30 | enum: |
| 31 | - adi,ad7170 |
| 32 | - adi,ad7171 |
| 33 | - adi,ad7780 |
| 34 | - adi,ad7781 |
| 35 | |
| 36 | reg: |
| 37 | maxItems: 1 |
| 38 | |
| 39 | avdd-supply: |
| 40 | description: |
| 41 | The regulator supply for the ADC reference voltage. |
| 42 | |
| 43 | powerdown-gpios: |
| 44 | description: |
| 45 | Must be the device tree identifier of the PDRST pin. If |
| 46 | specified, it will be asserted during driver probe. As the |
| 47 | line is active high, it should be marked GPIO_ACTIVE_HIGH. |
| 48 | maxItems: 1 |
| 49 | |
| 50 | adi,gain-gpios: |
| 51 | description: |
| 52 | Must be the device tree identifier of the GAIN pin. Only for |
| 53 | the ad778x chips. If specified, it will be asserted during |
| 54 | driver probe. As the line is active low, it should be marked |
| 55 | GPIO_ACTIVE_LOW. |
| 56 | maxItems: 1 |
| 57 | |
| 58 | adi,filter-gpios: |
| 59 | description: |
| 60 | Must be the device tree identifier of the FILTER pin. Only |
| 61 | for the ad778x chips. If specified, it will be asserted |
| 62 | during driver probe. As the line is active low, it should be |
| 63 | marked GPIO_ACTIVE_LOW. |
| 64 | maxItems: 1 |
| 65 | |
| 66 | required: |
| 67 | - compatible |
| 68 | - reg |
| 69 | |
| 70 | additionalProperties: false |
| 71 | |
| 72 | examples: |
| 73 | - | |
| 74 | #include <dt-bindings/gpio/gpio.h> |
| 75 | spi { |
| 76 | #address-cells = <1>; |
| 77 | #size-cells = <0>; |
| 78 | |
| 79 | adc@0 { |
| 80 | compatible = "adi,ad7780"; |
| 81 | reg = <0>; |
| 82 | |
| Tom Rini | 93743d2 | 2024-04-01 09:08:13 -0400 | [diff] [blame] | 83 | avdd-supply = <&vdd_supply>; |
| 84 | powerdown-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>; |
| 85 | adi,gain-gpios = <&gpio1 5 GPIO_ACTIVE_LOW>; |
| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 86 | adi,filter-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>; |
| 87 | }; |
| 88 | }; |