mirror of https://gitee.com/openkylin/linux.git
dt-bindings: iio: adc: add adi,ad7780.yaml binding
This patch adds a YAML binding for the Analog Devices AD7780/1 and AD7170/1 analog-to-digital converters. Signed-off-by: Renato Lui Geh <renatogeh@gmail.com> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Renato Lui Geh
Jonathan Cameron
parent
13c12f6930
commit
8f69a686e2
|
|
@ -1,48 +0,0 @@
|
||||||
* Analog Devices AD7170/AD7171/AD7780/AD7781
|
|
||||||
|
|
||||||
Data sheets:
|
|
||||||
|
|
||||||
- AD7170:
|
|
||||||
* https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
|
|
||||||
- AD7171:
|
|
||||||
* https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
|
|
||||||
- AD7780:
|
|
||||||
* https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
|
|
||||||
- AD7781:
|
|
||||||
* https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
|
|
||||||
|
|
||||||
Required properties:
|
|
||||||
|
|
||||||
- compatible: should be one of
|
|
||||||
* "adi,ad7170"
|
|
||||||
* "adi,ad7171"
|
|
||||||
* "adi,ad7780"
|
|
||||||
* "adi,ad7781"
|
|
||||||
- reg: spi chip select number for the device
|
|
||||||
- vref-supply: the regulator supply for the ADC reference voltage
|
|
||||||
|
|
||||||
Optional properties:
|
|
||||||
|
|
||||||
- powerdown-gpios: must be the device tree identifier of the PDRST pin. If
|
|
||||||
specified, it will be asserted during driver probe. As the
|
|
||||||
line is active high, it should be marked GPIO_ACTIVE_HIGH.
|
|
||||||
- adi,gain-gpios: must be the device tree identifier of the GAIN pin. Only for
|
|
||||||
the ad778x chips. If specified, it will be asserted during
|
|
||||||
driver probe. As the line is active low, it should be marked
|
|
||||||
GPIO_ACTIVE_LOW.
|
|
||||||
- adi,filter-gpios: must be the device tree identifier of the FILTER pin. Only
|
|
||||||
for the ad778x chips. If specified, it will be asserted
|
|
||||||
during driver probe. As the line is active low, it should be
|
|
||||||
marked GPIO_ACTIVE_LOW.
|
|
||||||
|
|
||||||
Example:
|
|
||||||
|
|
||||||
adc@0 {
|
|
||||||
compatible = "adi,ad7780";
|
|
||||||
reg = <0>;
|
|
||||||
vref-supply = <&vdd_supply>
|
|
||||||
|
|
||||||
powerdown-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
|
|
||||||
adi,gain-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
|
|
||||||
adi,filter-gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
|
|
||||||
};
|
|
||||||
|
|
@ -0,0 +1,87 @@
|
||||||
|
# SPDX-License-Identifier: GPL-2.0
|
||||||
|
%YAML 1.2
|
||||||
|
---
|
||||||
|
$id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml#
|
||||||
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||||||
|
|
||||||
|
title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters
|
||||||
|
|
||||||
|
maintainers:
|
||||||
|
- Michael Hennerich <michael.hennerich@analog.com>
|
||||||
|
|
||||||
|
description: |
|
||||||
|
The ad7780 is a sigma-delta analog to digital converter. This driver provides
|
||||||
|
reading voltage values and status bits from both the ad778x and ad717x series.
|
||||||
|
Its interface also allows writing on the FILTER and GAIN GPIO pins on the
|
||||||
|
ad778x.
|
||||||
|
|
||||||
|
Specifications on the converters can be found at:
|
||||||
|
AD7170:
|
||||||
|
https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
|
||||||
|
AD7171:
|
||||||
|
https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
|
||||||
|
AD7780:
|
||||||
|
https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
|
||||||
|
AD7781:
|
||||||
|
https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
|
||||||
|
|
||||||
|
properties:
|
||||||
|
compatible:
|
||||||
|
enum:
|
||||||
|
- adi,ad7170
|
||||||
|
- adi,ad7171
|
||||||
|
- adi,ad7780
|
||||||
|
- adi,ad7781
|
||||||
|
|
||||||
|
reg:
|
||||||
|
maxItems: 1
|
||||||
|
|
||||||
|
avdd-supply:
|
||||||
|
description:
|
||||||
|
The regulator supply for the ADC reference voltage.
|
||||||
|
maxItems: 1
|
||||||
|
|
||||||
|
powerdown-gpios:
|
||||||
|
description:
|
||||||
|
Must be the device tree identifier of the PDRST pin. If
|
||||||
|
specified, it will be asserted during driver probe. As the
|
||||||
|
line is active high, it should be marked GPIO_ACTIVE_HIGH.
|
||||||
|
maxItems: 1
|
||||||
|
|
||||||
|
adi,gain-gpios:
|
||||||
|
description:
|
||||||
|
Must be the device tree identifier of the GAIN pin. Only for
|
||||||
|
the ad778x chips. If specified, it will be asserted during
|
||||||
|
driver probe. As the line is active low, it should be marked
|
||||||
|
GPIO_ACTIVE_LOW.
|
||||||
|
maxItems: 1
|
||||||
|
|
||||||
|
adi,filter-gpios:
|
||||||
|
description:
|
||||||
|
Must be the device tree identifier of the FILTER pin. Only
|
||||||
|
for the ad778x chips. If specified, it will be asserted
|
||||||
|
during driver probe. As the line is active low, it should be
|
||||||
|
marked GPIO_ACTIVE_LOW.
|
||||||
|
maxItems: 1
|
||||||
|
|
||||||
|
required:
|
||||||
|
- compatible
|
||||||
|
- reg
|
||||||
|
|
||||||
|
examples:
|
||||||
|
- |
|
||||||
|
#include <dt-bindings/gpio/gpio.h>
|
||||||
|
spi0 {
|
||||||
|
#address-cells = <1>;
|
||||||
|
#size-cells = <0>;
|
||||||
|
|
||||||
|
adc@0 {
|
||||||
|
compatible = "adi,ad7780";
|
||||||
|
reg = <0>;
|
||||||
|
|
||||||
|
avdd-supply = <&vdd_supply>;
|
||||||
|
powerdown-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
|
||||||
|
adi,gain-gpios = <&gpio1 5 GPIO_ACTIVE_LOW>;
|
||||||
|
adi,filter-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;
|
||||||
|
};
|
||||||
|
};
|
||||||
Loading…
Reference in New Issue