0001 # SPDX-License-Identifier: GPL-2.0
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/iio/adc/adi,ad7606.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Analog Devices AD7606 Simultaneous Sampling ADC
0008
0009 maintainers:
0010 - Michael Hennerich <michael.hennerich@analog.com>
0011
0012 description: |
0013 Analog Devices AD7606 Simultaneous Sampling ADC
0014 https://www.analog.com/media/en/technical-documentation/data-sheets/ad7606_7606-6_7606-4.pdf
0015 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7606B.pdf
0016 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7616.pdf
0017
0018 properties:
0019 compatible:
0020 enum:
0021 - adi,ad7605-4
0022 - adi,ad7606-8
0023 - adi,ad7606-6
0024 - adi,ad7606-4
0025 - adi,ad7606b
0026 - adi,ad7616
0027
0028 reg:
0029 maxItems: 1
0030
0031 spi-cpha: true
0032
0033 spi-cpol: true
0034
0035 spi-max-frequency: true
0036
0037 avcc-supply: true
0038
0039 interrupts:
0040 maxItems: 1
0041
0042 adi,conversion-start-gpios:
0043 description:
0044 Must be the device tree identifier of the CONVST pin.
0045 This logic input is used to initiate conversions on the analog
0046 input channels. As the line is active high, it should be marked
0047 GPIO_ACTIVE_HIGH.
0048 maxItems: 1
0049
0050 reset-gpios:
0051 description:
0052 Must be the device tree identifier of the RESET pin. If specified,
0053 it will be asserted during driver probe. As the line is active high,
0054 it should be marked GPIO_ACTIVE_HIGH.
0055 maxItems: 1
0056
0057 standby-gpios:
0058 description:
0059 Must be the device tree identifier of the STBY pin. This pin is used
0060 to place the AD7606 into one of two power-down modes, Standby mode or
0061 Shutdown mode. As the line is active low, it should be marked
0062 GPIO_ACTIVE_LOW.
0063 maxItems: 1
0064
0065 adi,first-data-gpios:
0066 description:
0067 Must be the device tree identifier of the FRSTDATA pin.
0068 The FRSTDATA output indicates when the first channel, V1, is
0069 being read back on either the parallel, byte or serial interface.
0070 As the line is active high, it should be marked GPIO_ACTIVE_HIGH.
0071 maxItems: 1
0072
0073 adi,range-gpios:
0074 description:
0075 Must be the device tree identifier of the RANGE pin. The polarity on
0076 this pin determines the input range of the analog input channels. If
0077 this pin is tied to a logic high, the analog input range is ±10V for
0078 all channels. If this pin is tied to a logic low, the analog input range
0079 is ±5V for all channels. As the line is active high, it should be marked
0080 GPIO_ACTIVE_HIGH.
0081 maxItems: 1
0082
0083 adi,oversampling-ratio-gpios:
0084 description:
0085 Must be the device tree identifier of the over-sampling
0086 mode pins. As the line is active high, it should be marked
0087 GPIO_ACTIVE_HIGH.
0088 maxItems: 3
0089
0090 adi,sw-mode:
0091 description:
0092 Software mode of operation, so far available only for ad7616 and ad7606b.
0093 It is enabled when all three oversampling mode pins are connected to
0094 high level. The device is configured by the corresponding registers. If the
0095 adi,oversampling-ratio-gpios property is defined, then the driver will set the
0096 oversampling gpios to high. Otherwise, it is assumed that the pins are hardwired
0097 to VDD.
0098 type: boolean
0099
0100 required:
0101 - compatible
0102 - reg
0103 - spi-cpha
0104 - avcc-supply
0105 - interrupts
0106 - adi,conversion-start-gpios
0107
0108 additionalProperties: false
0109
0110 examples:
0111 - |
0112 #include <dt-bindings/gpio/gpio.h>
0113 #include <dt-bindings/interrupt-controller/irq.h>
0114 spi0 {
0115 #address-cells = <1>;
0116 #size-cells = <0>;
0117
0118 adc@0 {
0119 compatible = "adi,ad7606-8";
0120 reg = <0>;
0121 spi-max-frequency = <1000000>;
0122 spi-cpol;
0123 spi-cpha;
0124
0125 avcc-supply = <&adc_vref>;
0126
0127 interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
0128 interrupt-parent = <&gpio>;
0129
0130 adi,conversion-start-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
0131 reset-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>;
0132 adi,first-data-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
0133 adi,oversampling-ratio-gpios = <&gpio 18 GPIO_ACTIVE_HIGH>,
0134 <&gpio 23 GPIO_ACTIVE_HIGH>,
0135 <&gpio 26 GPIO_ACTIVE_HIGH>;
0136 standby-gpios = <&gpio 24 GPIO_ACTIVE_LOW>;
0137 adi,sw-mode;
0138 };
0139 };
0140 ...
