68 lines
1.6 KiB
YAML
68 lines
1.6 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
|
|
%YAML 1.2
|
|
---
|
|
$id: "http://devicetree.org/schemas/iio/adc/avia-hx711.yaml#"
|
|
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
|
|
|
|
title: AVIA HX711 ADC chip for weight cells
|
|
|
|
maintainers:
|
|
- Andreas Klinger <ak@it-klinger.de>
|
|
|
|
description: |
|
|
Bit-banging driver using two GPIOs:
|
|
- sck-gpio gives a clock to the sensor with 24 cycles for data retrieval
|
|
and up to 3 cycles for selection of the input channel and gain for the
|
|
next measurement
|
|
- dout-gpio is the sensor data the sensor responds to the clock
|
|
|
|
Specifications about the driver can be found at:
|
|
http://www.aviaic.com/ENProducts.aspx
|
|
|
|
properties:
|
|
compatible:
|
|
enum:
|
|
- avia,hx711
|
|
|
|
sck-gpios:
|
|
description:
|
|
Definition of the GPIO for the clock (output). In the datasheet it is
|
|
named PD_SCK
|
|
maxItems: 1
|
|
|
|
dout-gpios:
|
|
description:
|
|
Definition of the GPIO for the data-out sent by the sensor in
|
|
response to the clock (input).
|
|
See Documentation/devicetree/bindings/gpio/gpio.txt for information
|
|
on how to specify a consumer gpio.
|
|
maxItems: 1
|
|
|
|
avdd-supply:
|
|
description:
|
|
Definition of the regulator used as analog supply
|
|
|
|
clock-frequency:
|
|
minimum: 20000
|
|
maximum: 2500000
|
|
default: 400000
|
|
|
|
required:
|
|
- compatible
|
|
- sck-gpios
|
|
- dout-gpios
|
|
- avdd-supply
|
|
|
|
additionalProperties: false
|
|
|
|
examples:
|
|
- |
|
|
#include <dt-bindings/gpio/gpio.h>
|
|
weight {
|
|
compatible = "avia,hx711";
|
|
sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;
|
|
dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
|
|
avdd-supply = <&avdd>;
|
|
clock-frequency = <100000>;
|
|
};
|