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>
74 lines
1.8 KiB
YAML
74 lines
1.8 KiB
YAML
# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
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# Copyright 2019 Marcus Folkesson <marcus.folkesson@gmail.com>
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%YAML 1.2
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---
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$id: "http://devicetree.org/schemas/iio/adc/microchip,mcp3911.yaml#"
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$schema: "http://devicetree.org/meta-schemas/core.yaml#"
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title: Microchip MCP3911 Dual channel analog front end (ADC)
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maintainers:
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- Marcus Folkesson <marcus.folkesson@gmail.com>
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- Kent Gustavsson <nedo80@gmail.com>
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description: |
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Bindings for the Microchip MCP3911 Dual channel ADC device. Datasheet can be
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found here: https://ww1.microchip.com/downloads/en/DeviceDoc/20002286C.pdf
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properties:
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compatible:
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enum:
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- microchip,mcp3911
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reg:
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maxItems: 1
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spi-max-frequency:
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maximum: 20000000
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clocks:
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description: |
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Phandle and clock identifier for external sampling clock.
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If not specified, the internal crystal oscillator will be used.
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maxItems: 1
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interrupts:
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description: IRQ line of the ADC
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maxItems: 1
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microchip,device-addr:
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description: Device address when multiple MCP3911 chips are present on the same SPI bus.
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allOf:
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- $ref: /schemas/types.yaml#/definitions/uint32
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- enum: [0, 1, 2, 3]
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- default: 0
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vref-supply:
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description: |
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Phandle to the external reference voltage supply.
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If not specified, the internal voltage reference (1.2V) will be used.
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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adc@0 {
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compatible = "microchip,mcp3911";
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reg = <0>;
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interrupt-parent = <&gpio5>;
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interrupts = <15 2>;
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spi-max-frequency = <20000000>;
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microchip,device-addr = <0>;
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vref-supply = <&vref_reg>;
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clocks = <&xtal>;
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};
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};
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