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Signed-off-by: Marcelo Schmitt --- .../bindings/iio/adc/adi,ad4134.yaml | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml index ea6d7e026419..d843c02a394a 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml @@ -131,6 +131,28 @@ properties: enum: [ free-running, gated ] default: gated + adi,spi-mode: + $ref: /schemas/types.yaml#/definitions/string + enum: [ no-cs, 4-wire, one-channel-chain, two-channel-chain ] + description: | + This property indicates the SPI wiring configuration. + + When this property is omitted, it is assumed that the device is using + 'no-cs' wiring. When this property is present, it indicates that the + device is using one of the following wiring configurations: + + * no-cs: The datasheet calls this "minimum I/O mode". In this mode, the CS + line is not used (tied to GND). + * 4-wire: Specifies a conventional SPI wiring configuration. + * one-channel-chain: In this mode, the DOUT0 line of one chip is connected + to DOUT2 of the next chip upstream in the chain. Only the data interface + of the upmost device in the stream is in direct connection with the + digital host. + * two-channel-chain: In this mode, the DOUT0 and DOUT1 lines of one chip + are respectively connected to DOUT2 and DOUT3 of the next chip upstream + in the chain. Only the data interface of the upmost device in the stream + is in direct connection with the digital host. + required: - compatible - reg -- 2.53.0