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