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