111 lines
2.8 KiB
YAML
111 lines
2.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/adi,ad7779.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices AD777X family 8-Channel, 24-Bit, Simultaneous Sampling ADCs
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maintainers:
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- Ramona Nechita <ramona.nechita@analog.com>
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description: |
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The AD777X family consist of 8-channel, simultaneous sampling analog-to-
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digital converter (ADC). Eight full Σ-Δ ADCs are on-chip. The
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AD7771 provides an ultralow input current to allow direct sensor
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connection. Each input channel has a programmable gain stage
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allowing gains of 1, 2, 4, and 8 to map lower amplitude sensor
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outputs into the full-scale ADC input range, maximizing the
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dynamic range of the signal chain.
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https://www.analog.com/media/en/technical-documentation/data-sheets/ad7770.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/ad7771.pdf
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https://www.analog.com/media/en/technical-documentation/data-sheets/ad7779.pdf
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$ref: /schemas/spi/spi-peripheral-props.yaml#
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properties:
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compatible:
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enum:
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- adi,ad7770
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- adi,ad7771
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- adi,ad7779
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reg:
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maxItems: 1
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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clocks:
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maxItems: 1
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avdd1-supply:
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description: Front-End analog supply AVDD1. Can be used as conversion ref.
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avdd2-supply:
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description: AVDD2 Analog Supply from 2.2 V to 3.6 V.
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avdd4-supply:
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description: AVDD4 SAR Analog Supply and Reference Source.
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interrupts:
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minItems: 1
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items:
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- description: |
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adc_rdy: Interrupt line for DRDY signal which indicates the end of
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conversion independently of the interface selected to read back the
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Σ-∆ conversion.
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- description: |
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Alert: The chip includes self diagnostic features to guarantee the
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correct operation. If an error is detected, the ALERT pin is pulled
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high to generate an external interruption to the controller.
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interrupt-names:
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minItems: 1
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maxItems: 2
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items:
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enum:
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- adc_rdy
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- alert
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start-gpios:
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description:
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Pin that controls start synchronization pulse.
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maxItems: 1
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reset-gpios:
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maxItems: 1
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required:
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- compatible
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- reg
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- clocks
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- interrupts
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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adc@0 {
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compatible = "adi,ad7779";
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reg = <0>;
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start-gpios = <&gpio0 87 GPIO_ACTIVE_LOW>;
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reset-gpios = <&gpio0 93 GPIO_ACTIVE_LOW>;
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interrupt-parent = <&intc>;
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interrupts = <0 56 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "adc_rdy";
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clocks = <&adc_clk>;
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};
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};
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...
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