87 lines
2.1 KiB
YAML
87 lines
2.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/dac/microchip,mcp4821.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Microchip MCP4821 and similar DACs
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description: |
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Supports MCP48x1 (single channel) and MCP48x2 (dual channel) series of DACs.
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Device supports simplex communication over SPI in Mode 0 and Mode 3.
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+---------+--------------+-------------+
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| Device | Resolution | Channels |
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|---------|--------------|-------------|
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| MCP4801 | 8-bit | 1 |
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| MCP4802 | 8-bit | 2 |
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| MCP4811 | 10-bit | 1 |
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| MCP4812 | 10-bit | 2 |
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| MCP4821 | 12-bit | 1 |
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| MCP4822 | 12-bit | 2 |
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+---------+--------------+-------------+
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Datasheet:
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MCP48x1: https://ww1.microchip.com/downloads/en/DeviceDoc/22244B.pdf
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MCP48x2: https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf
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maintainers:
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- Anshul Dalal <anshulusr@gmail.com>
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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properties:
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compatible:
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enum:
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- microchip,mcp4801
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- microchip,mcp4802
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- microchip,mcp4811
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- microchip,mcp4812
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- microchip,mcp4821
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- microchip,mcp4822
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reg:
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maxItems: 1
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vdd-supply: true
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ldac-gpios:
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description: |
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Active Low LDAC (Latch DAC Input) pin used to update the DAC output.
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maxItems: 1
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powerdown-gpios:
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description: |
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Active Low SHDN pin used to enter the shutdown mode.
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maxItems: 1
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spi-cpha: true
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spi-cpol: true
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required:
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- compatible
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- reg
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- vdd-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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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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dac@0 {
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compatible = "microchip,mcp4821";
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reg = <0>;
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vdd-supply = <&vdd_regulator>;
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ldac-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
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powerdown-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
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spi-cpha;
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spi-cpol;
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};
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};
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