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94264cc9ab
The MCP391X family provides an active low reset signal that is still not described in the bindings. Add reset-gpios to the bindings and the example. Co-developed-by: Lukas Rauber <lukas.rauber@janitza.de> Signed-off-by: Lukas Rauber <lukas.rauber@janitza.de> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://patch.msgid.link/20250428-mcp3911-fixes-v2-2-406e39330c3d@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
94 lines
2.3 KiB
YAML
94 lines
2.3 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,mcp3910
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- microchip,mcp3911
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- microchip,mcp3912
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- microchip,mcp3913
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- microchip,mcp3914
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- microchip,mcp3918
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- microchip,mcp3919
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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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reset-gpios:
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maxItems: 1
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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,data-ready-hiz:
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description:
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Data Ready Pin Inactive State Control
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true = The DR pin state is high-impedance
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false = The DR pin state is logic high
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type: boolean
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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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$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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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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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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reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
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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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