projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 93743d24 TR |
1 | # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| 2 | %YAML 1.2 | |
| 3 | --- | |
| 4 | $id: http://devicetree.org/schemas/iio/dac/microchip,mcp4821.yaml# | |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# | |
| 6 | ||
| 7 | title: Microchip MCP4821 and similar DACs | |
| 8 | ||
| 9 | description: | | |
| 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.pdf | |
| 26 | MCP48x2: https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf | |
| 27 | ||
| 28 | maintainers: | |
| 29 | - Anshul Dalal <anshulusr@gmail.com> | |
| 30 | ||
| 31 | allOf: | |
| 32 | - $ref: /schemas/spi/spi-peripheral-props.yaml# | |
| 33 | ||
| 34 | properties: | |
| 35 | compatible: | |
| 36 | enum: | |
| 37 | - microchip,mcp4801 | |
| 38 | - microchip,mcp4802 | |
| 39 | - microchip,mcp4811 | |
| 40 | - microchip,mcp4812 | |
| 41 | - microchip,mcp4821 | |
| 42 | - microchip,mcp4822 | |
| 43 | ||
| 44 | reg: | |
| 45 | maxItems: 1 | |
| 46 | ||
| 47 | vdd-supply: true | |
| 48 | ||
| 49 | ldac-gpios: | |
| 50 | description: | | |
| 51 | Active Low LDAC (Latch DAC Input) pin used to update the DAC output. | |
| 52 | maxItems: 1 | |
| 53 | ||
| 54 | powerdown-gpios: | |
| 55 | description: | | |
| 56 | Active Low SHDN pin used to enter the shutdown mode. | |
| 57 | maxItems: 1 | |
| 58 | ||
| 59 | spi-cpha: true | |
| 60 | spi-cpol: true | |
| 61 | ||
| 62 | required: | |
| 63 | - compatible | |
| 64 | - reg | |
| 65 | - vdd-supply | |
| 66 | ||
| 67 | additionalProperties: false | |
| 68 | ||
| 69 | examples: | |
| 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 | }; |