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Diffstat (limited to 'Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml b/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml new file mode 100644 index 000000000000..8a4100ceeaf2 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml @@ -0,0 +1,66 @@ +# 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 + maxItems: 1 + + clock-frequency: + minimum: 20000 + maximum: 2500000 + default: 400000 + +required: + - compatible + - sck-gpios + - dout-gpios + - avdd-supply + +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-suppy = <&avdd>; + clock-frequency = <100000>; + }; |