1* Analog Devices AD5755 IIO Multi-Channel DAC Linux Driver
2
3Required properties:
4 - compatible: Has to contain one of the following:
5	adi,ad5755
6	adi,ad5755-1
7	adi,ad5757
8	adi,ad5735
9	adi,ad5737
10
11 - reg: spi chip select number for the device
12 - spi-cpha or spi-cpol: is the only modes that is supported
13
14Recommended properties:
15 - spi-max-frequency: Definition as per
16		Documentation/devicetree/bindings/spi/spi-bus.txt
17
18Optional properties:
19See include/dt-bindings/iio/ad5755.h
20 - adi,ext-dc-dc-compenstation-resistor: boolean set if the hardware have an
21					 external resistor and thereby bypasses
22					 the internal compensation resistor.
23 - adi,dc-dc-phase:
24	Valid values for DC DC Phase control is:
25	0: All dc-to-dc converters clock on the same edge.
26	1: Channel A and Channel B clock on the same edge,
27	   Channel C and Channel D clock on opposite edges.
28	2: Channel A and Channel C clock on the same edge,
29	   Channel B and Channel D clock on opposite edges.
30	3: Channel A, Channel B, Channel C, and Channel D
31	   clock 90 degrees out of phase from each other.
32 - adi,dc-dc-freq-hz:
33	Valid values for DC DC frequency is [Hz]:
34	250000
35	410000
36	650000
37 - adi,dc-dc-max-microvolt:
38	Valid values for the maximum allowed Vboost voltage supplied by
39	the dc-to-dc converter is:
40	23000000
41	24500000
42	27000000
43	29500000
44
45Optional for every channel:
46 - adi,mode:
47	Valid values for DAC modes is:
48	0: 0 V to 5 V voltage range.
49	1: 0 V to 10 V voltage range.
50	2: Plus minus 5 V voltage range.
51	3: Plus minus 10 V voltage range.
52	4: 4 mA to 20 mA current range.
53	5: 0 mA to 20 mA current range.
54	6: 0 mA to 24 mA current range.
55 - adi,ext-current-sense-resistor: boolean set if the hardware a external
56				   current sense resistor.
57 - adi,enable-voltage-overrange: boolean enable voltage overrange
58 - adi,slew: Array of slewrate settings should contain 3 fields:
59	1: Should be either 0 or 1 in order to enable or disable slewrate.
60	2: Slew rate settings:
61		Valid values for the slew rate update frequency:
62		64000
63		32000
64		16000
65		8000
66		4000
67		2000
68		1000
69		500
70		250
71		125
72		64
73		32
74		16
75		8
76		4
77		0
78	3: Slew step size:
79		Valid values for the step size LSBs:
80		1
81		2
82		4
83		16
84		32
85		64
86		128
87		256
88
89Example:
90dac@0 {
91	#address-cells = <1>;
92	#size-cells = <0>;
93	compatible = "adi,ad5755";
94	reg = <0>;
95	spi-max-frequency = <1000000>;
96	spi-cpha;
97	adi,dc-dc-phase = <0>;
98	adi,dc-dc-freq-hz = <410000>;
99	adi,dc-dc-max-microvolt = <23000000>;
100	channel@0 {
101		reg = <0>;
102		adi,mode = <4>;
103		adi,ext-current-sense-resistor;
104		adi,slew = <0 64000 1>;
105	};
106	channel@1 {
107		reg = <1>;
108		adi,mode = <4>;
109		adi,ext-current-sense-resistor;
110		adi,slew = <0 64000 1>;
111	};
112	channel@2 {
113		reg = <2>;
114		adi,mode = <4>;
115		adi,ext-current-sense-resistor;
116		adi,slew = <0 64000 1>;
117	};
118	channel@3 {
119		reg = <3>;
120		adi,mode = <4>;
121		adi,ext-current-sense-resistor;
122		adi,slew = <0 64000 1>;
123	};
124};
125