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1# SPDX-License-Identifier: GPL-2.02%YAML 1.23---4$id: http://devicetree.org/schemas/iio/adc/avia-hx711.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: AVIA HX711 ADC chip for weight cells8 9maintainers:10 - Andreas Klinger <ak@it-klinger.de>11 12description: |13 Bit-banging driver using two GPIOs:14 - sck-gpio gives a clock to the sensor with 24 cycles for data retrieval15 and up to 3 cycles for selection of the input channel and gain for the16 next measurement17 - dout-gpio is the sensor data the sensor responds to the clock18 19 Specifications about the driver can be found at:20 http://www.aviaic.com/ENProducts.aspx21 22properties:23 compatible:24 enum:25 - avia,hx71126 27 sck-gpios:28 description:29 Definition of the GPIO for the clock (output). In the datasheet it is30 named PD_SCK31 maxItems: 132 33 dout-gpios:34 description:35 Definition of the GPIO for the data-out sent by the sensor in36 response to the clock (input).37 See Documentation/devicetree/bindings/gpio/gpio.txt for information38 on how to specify a consumer gpio.39 maxItems: 140 41 avdd-supply:42 description:43 Definition of the regulator used as analog supply44 45 clock-frequency:46 minimum: 2000047 maximum: 250000048 default: 40000049 50required:51 - compatible52 - sck-gpios53 - dout-gpios54 - avdd-supply55 56additionalProperties: false57 58examples:59 - |60 #include <dt-bindings/gpio/gpio.h>61 weight {62 compatible = "avia,hx711";63 sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;64 dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;65 avdd-supply = <&avdd>;66 clock-frequency = <100000>;67 };68