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