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