7f464532b0
Setting 'additionalProperties: false' is frequently omitted, but is important in order to check that there aren't extra undocumented properties in a binding. Ideally, we'd just add this automatically and make this the default, but there's some cases where it doesn't work. For example, if a common schema is referenced, then properties in the common schema aren't part of what's considered for 'additionalProperties'. Also, sometimes there are bus specific properties such as 'spi-max-frequency' that go into bus child nodes, but aren't defined in the child node's schema. So let's stick with the json-schema defined default and add 'additionalProperties: false' where needed. This will be a continual review comment and game of wack-a-mole. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Reviewed-by: Benjamin Gaignard <benjamin.gaignard@st.com> Acked-by: Stephen Boyd <sboyd@kernel.org> # clock Acked-by: Lee Jones <lee.jones@linaro.org>
68 lines
1.6 KiB
YAML
68 lines
1.6 KiB
YAML
# 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 <ak@it-klinger.de>
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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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