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 };
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