1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/dac/adi,ad5755.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Analog Devices AD5755 Multi-Channel DAC
8
9 maintainers:
10 - Sean Nyekjaer <sean.nyekjaer@prevas.dk>
11
12 properties:
13 compatible:
14 enum:
15 - adi,ad5755
16 - adi,ad5755-1
17 - adi,ad5757
18 - adi,ad5735
19 - adi,ad5737
20
21 reg:
22 maxItems: 1
23
24 spi-cpha:
25 description: Either this or spi-cpol but not both.
26 spi-cpol: true
27
28 adi,ext-dc-dc-compenstation-resistor:
29 $ref: /schemas/types.yaml#/definitions/flag
30 description:
31 Set if the hardware have an external resistor and thereby bypasses
32 the internal compensation resistor.
33
34 adi,dc-dc-phase:
35 $ref: /schemas/types.yaml#/definitions/uint32
36 enum: [0, 1, 2, 3]
37 description: |
38 Valid values for DC DC Phase control is:
39 0: All dc-to-dc converters clock on the same edge.
40 1: Channel A and Channel B clock on the same edge,
41 Channel C and Channel D clock on opposite edges.
42 2: Channel A and Channel C clock on the same edge,
43 Channel B and Channel D clock on opposite edges.
44 3: Channel A, Channel B, Channel C, and Channel D
45 clock 90 degrees out of phase from each other.
46
47 adi,dc-dc-freq-hz:
48 enum: [250000, 410000, 650000]
49
50 adi,dc-dc-max-microvolt:
51 description:
52 Maximum allowed Vboost voltage supplied by the dc-to-dc converter.
53 enum: [23000000, 24500000, 27000000, 29500000]
54
55 "#address-cells":
56 const: 1
57
58 "#size-cells":
59 const: 0
60
61 "#io-channel-cells":
62 const: 1
63
64 required:
65 - compatible
66 - reg
67
68 patternProperties:
69 "^channel@[0-7]$":
70 type: object
71 description: Child node to describe a channel
72 properties:
73 reg:
74 maxItems: 1
75
76 adi,mode:
77 $ref: /schemas/types.yaml#/definitions/uint32
78 minimum: 0
79 maximum: 6
80 description: |
81 Valid values for DAC modes is:
82 0: 0 V to 5 V voltage range.
83 1: 0 V to 10 V voltage range.
84 2: Plus minus 5 V voltage range.
85 3: Plus minus 10 V voltage range.
86 4: 4 mA to 20 mA current range.
87 5: 0 mA to 20 mA current range.
88 6: 0 mA to 24 mA current range.
89
90 adi,ext-current-sense-resistor:
91 $ref: /schemas/types.yaml#/definitions/flag
92 description:
93 Set if the hardware has an external current sense resistor
94
95 adi,enable-voltage-overrange:
96 $ref: /schemas/types.yaml#/definitions/flag
97 description: Enable voltage overrange
98
99 adi,slew:
100 $ref: /schemas/types.yaml#/definitions/uint32-array
101 description: |
102 Array of slewrate settings should contain 3 fields:
103 1: Should be either 0 or 1 in order to enable or disable slewrate.
104 2: Slew rate update frequency
105 3: Slew step size
106 items:
107 - enum: [0, 1]
108 - enum: [64000, 32000, 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 64, 32, 16, 8, 4, 0]
109 - enum: [1, 2, 4, 16, 32, 64, 128, 256]
110
111 required:
112 - reg
113
114 additionalProperties: false
115
116 oneOf:
117 - required:
118 - spi-cpha
119 - required:
120 - spi-cpol
121
122 allOf:
123 - $ref: /schemas/spi/spi-peripheral-props.yaml#
124
125 unevaluatedProperties: false
126
127 examples:
128 - |
129 spi {
130 #address-cells = <1>;
131 #size-cells = <0>;
132
133 dac@0 {
134 #address-cells = <1>;
135 #size-cells = <0>;
136 compatible = "adi,ad5755";
137 reg = <0>;
138 spi-max-frequency = <1000000>;
139 spi-cpha;
140 adi,dc-dc-phase = <0>;
141 adi,dc-dc-freq-hz = <410000>;
142 adi,dc-dc-max-microvolt = <23000000>;
143 channel@0 {
144 reg = <0>;
145 adi,mode = <4>;
146 adi,ext-current-sense-resistor;
147 adi,slew = <0 64000 1>;
148 };
149 channel@1 {
150 reg = <1>;
151 adi,mode = <4>;
152 adi,ext-current-sense-resistor;
153 adi,slew = <0 64000 1>;
154 };
155 channel@2 {
156 reg = <2>;
157 adi,mode = <4>;
158 adi,ext-current-sense-resistor;
159 adi,slew = <0 64000 1>;
160 };
161 channel@3 {
162 reg = <3>;
163 adi,mode = <4>;
164 adi,ext-current-sense-resistor;
165 adi,slew = <0 64000 1>;
166 };
167 };
168 };
169 ...
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