1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/iio/adc/adi,ad7606.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Analog Devices AD7606 Simultaneous Sampling ADC 8 9maintainers: 10 - Beniamin Bia <beniamin.bia@analog.com> 11 - Stefan Popa <stefan.popa@analog.com> 12 13description: | 14 Analog Devices AD7606 Simultaneous Sampling ADC 15 https://www.analog.com/media/en/technical-documentation/data-sheets/ad7606_7606-6_7606-4.pdf 16 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7606B.pdf 17 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7616.pdf 18 19properties: 20 compatible: 21 enum: 22 - adi,ad7605-4 23 - adi,ad7606-8 24 - adi,ad7606-6 25 - adi,ad7606-4 26 - adi,ad7606b 27 - adi,ad7616 28 29 reg: 30 maxItems: 1 31 32 spi-cpha: true 33 34 avcc-supply: true 35 36 interrupts: 37 maxItems: 1 38 39 adi,conversion-start-gpios: 40 description: 41 Must be the device tree identifier of the CONVST pin. 42 This logic input is used to initiate conversions on the analog 43 input channels. As the line is active high, it should be marked 44 GPIO_ACTIVE_HIGH. 45 maxItems: 1 46 47 reset-gpios: 48 description: 49 Must be the device tree identifier of the RESET pin. If specified, 50 it will be asserted during driver probe. As the line is active high, 51 it should be marked GPIO_ACTIVE_HIGH. 52 maxItems: 1 53 54 standby-gpios: 55 description: 56 Must be the device tree identifier of the STBY pin. This pin is used 57 to place the AD7606 into one of two power-down modes, Standby mode or 58 Shutdown mode. As the line is active low, it should be marked 59 GPIO_ACTIVE_LOW. 60 maxItems: 1 61 62 adi,first-data-gpios: 63 description: 64 Must be the device tree identifier of the FRSTDATA pin. 65 The FRSTDATA output indicates when the first channel, V1, is 66 being read back on either the parallel, byte or serial interface. 67 As the line is active high, it should be marked GPIO_ACTIVE_HIGH. 68 maxItems: 1 69 70 adi,range-gpios: 71 description: 72 Must be the device tree identifier of the RANGE pin. The polarity on 73 this pin determines the input range of the analog input channels. If 74 this pin is tied to a logic high, the analog input range is ±10V for 75 all channels. If this pin is tied to a logic low, the analog input range 76 is ±5V for all channels. As the line is active high, it should be marked 77 GPIO_ACTIVE_HIGH. 78 maxItems: 1 79 80 adi,oversampling-ratio-gpios: 81 description: 82 Must be the device tree identifier of the over-sampling 83 mode pins. As the line is active high, it should be marked 84 GPIO_ACTIVE_HIGH. 85 maxItems: 3 86 87 adi,sw-mode: 88 description: 89 Software mode of operation, so far available only for ad7616 and ad7606b. 90 It is enabled when all three oversampling mode pins are connected to 91 high level. The device is configured by the corresponding registers. If the 92 adi,oversampling-ratio-gpios property is defined, then the driver will set the 93 oversampling gpios to high. Otherwise, it is assumed that the pins are hardwired 94 to VDD. 95 type: boolean 96 97required: 98 - compatible 99 - reg 100 - spi-cpha 101 - avcc-supply 102 - interrupts 103 - adi,conversion-start-gpios 104 105examples: 106 - | 107 #include <dt-bindings/gpio/gpio.h> 108 #include <dt-bindings/interrupt-controller/irq.h> 109 spi0 { 110 #address-cells = <1>; 111 #size-cells = <0>; 112 113 adc@0 { 114 compatible = "adi,ad7606-8"; 115 reg = <0>; 116 spi-max-frequency = <1000000>; 117 spi-cpol; 118 spi-cpha; 119 120 avcc-supply = <&adc_vref>; 121 122 interrupts = <25 IRQ_TYPE_EDGE_FALLING>; 123 interrupt-parent = <&gpio>; 124 125 adi,conversion-start-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>; 126 reset-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>; 127 adi,first-data-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>; 128 adi,oversampling-ratio-gpios = <&gpio 18 GPIO_ACTIVE_HIGH>, 129 <&gpio 23 GPIO_ACTIVE_HIGH>, 130 <&gpio 26 GPIO_ACTIVE_HIGH>; 131 standby-gpios = <&gpio 24 GPIO_ACTIVE_LOW>; 132 adi,sw-mode; 133 }; 134 }; 135... 136