42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
Analog Devices AD7768-1 ADC device driver
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Required properties for the AD7768-1:
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- compatible: Must be "adi,ad7768-1"
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- reg: SPI chip select number for the device
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- spi-max-frequency: Max SPI frequency to use
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see: Documentation/devicetree/bindings/spi/spi-bus.txt
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- clocks: phandle to the master clock (mclk)
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see: Documentation/devicetree/bindings/clock/clock-bindings.txt
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- clock-names: Must be "mclk".
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- interrupts: IRQ line for the ADC
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see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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- vref-supply: vref supply can be used as reference for conversion
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- adi,sync-in-gpios: must be the device tree identifier of the SYNC-IN pin. Enables
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synchronization of multiple devices that require simultaneous sampling.
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A pulse is always required if the configuration is changed in any way, for example
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if the filter decimation rate changes. As the line is active low, it should
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be marked GPIO_ACTIVE_LOW.
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Optional properties:
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- reset-gpios : GPIO spec for the RESET pin. If specified, it will be asserted during
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driver probe. As the line is active low, it should be marked GPIO_ACTIVE_LOW.
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Example:
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adc@0 {
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compatible = "adi,ad7768-1";
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reg = <0>;
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spi-max-frequency = <2000000>;
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spi-cpol;
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spi-cpha;
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vref-supply = <&adc_vref>;
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interrupts = <25 IRQ_TYPE_EDGE_RISING>;
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interrupt-parent = <&gpio>;
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adi,sync-in-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
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reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
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clocks = <&ad7768_mclk>;
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clock-names = "mclk";
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};
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