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1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/iio/dac/microchip,mcp4821.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Microchip MCP4821 and similar DACs8 9description: |10 Supports MCP48x1 (single channel) and MCP48x2 (dual channel) series of DACs.11 Device supports simplex communication over SPI in Mode 0 and Mode 3.12 13 +---------+--------------+-------------+14 | Device | Resolution | Channels |15 |---------|--------------|-------------|16 | MCP4801 | 8-bit | 1 |17 | MCP4802 | 8-bit | 2 |18 | MCP4811 | 10-bit | 1 |19 | MCP4812 | 10-bit | 2 |20 | MCP4821 | 12-bit | 1 |21 | MCP4822 | 12-bit | 2 |22 +---------+--------------+-------------+23 24 Datasheet:25 MCP48x1: https://ww1.microchip.com/downloads/en/DeviceDoc/22244B.pdf26 MCP48x2: https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf27 28maintainers:29 - Anshul Dalal <anshulusr@gmail.com>30 31allOf:32 - $ref: /schemas/spi/spi-peripheral-props.yaml#33 34properties:35 compatible:36 enum:37 - microchip,mcp480138 - microchip,mcp480239 - microchip,mcp481140 - microchip,mcp481241 - microchip,mcp482142 - microchip,mcp482243 44 reg:45 maxItems: 146 47 vdd-supply: true48 49 ldac-gpios:50 description: |51 Active Low LDAC (Latch DAC Input) pin used to update the DAC output.52 maxItems: 153 54 powerdown-gpios:55 description: |56 Active Low SHDN pin used to enter the shutdown mode.57 maxItems: 158 59 spi-cpha: true60 spi-cpol: true61 62required:63 - compatible64 - reg65 - vdd-supply66 67additionalProperties: false68 69examples:70 - |71 #include <dt-bindings/gpio/gpio.h>72 73 spi {74 #address-cells = <1>;75 #size-cells = <0>;76 77 dac@0 {78 compatible = "microchip,mcp4821";79 reg = <0>;80 vdd-supply = <&vdd_regulator>;81 ldac-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;82 powerdown-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;83 spi-cpha;84 spi-cpol;85 };86 };87