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