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    Subject[PATCH v4 7/9] dt-bindings: iio: adc: at91-sama5d2_adc: add channel specific consumer info
    Date
    Added defines for channel consumer device-tree binding

    Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
    Reviewed-by: Rob Herring <robh@kernel.org>
    ---
    .../devicetree/bindings/iio/adc/at91-sama5d2_adc.txt | 9 +++++++++
    include/dt-bindings/iio/adc/at91-sama5d2_adc.h | 16 ++++++++++++++++
    2 files changed, 25 insertions(+)
    create mode 100644 include/dt-bindings/iio/adc/at91-sama5d2_adc.h

    diff --git a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
    index 6469a4c..4a3c1d4 100644
    --- a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
    +++ b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
    @@ -21,6 +21,14 @@ Optional properties:
    - dmas: Phandle to dma channel for the ADC.
    - dma-names: Must be "rx" when dmas property is being used.
    See ../../dma/dma.txt for details.
    + - #io-channel-cells: in case consumer drivers are attached, this must be 1.
    + See <Documentation/devicetree/bindings/iio/iio-bindings.txt> for details.
    +
    +Properties for consumer drivers:
    + - Consumer drivers can be connected to this producer device, as specified
    + in <Documentation/devicetree/bindings/iio/iio-bindings.txt>
    + - Channels exposed are specified in:
    + <dt-bindings/iio/adc/at91-sama5d2_adc.txt>

    Example:

    @@ -38,4 +46,5 @@ adc: adc@fc030000 {
    atmel,trigger-edge-type = <IRQ_TYPE_EDGE_BOTH>;
    dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | AT91_XDMAC_DT_PERID(25))>;
    dma-names = "rx";
    + #io-channel-cells = <1>;
    }
    diff --git a/include/dt-bindings/iio/adc/at91-sama5d2_adc.h b/include/dt-bindings/iio/adc/at91-sama5d2_adc.h
    new file mode 100644
    index 0000000..70f99db
    --- /dev/null
    +++ b/include/dt-bindings/iio/adc/at91-sama5d2_adc.h
    @@ -0,0 +1,16 @@
    +/* SPDX-License-Identifier: GPL-2.0 */
    +/*
    + * This header provides constants for configuring the AT91 SAMA5D2 ADC
    + */
    +
    +#ifndef _DT_BINDINGS_IIO_ADC_AT91_SAMA5D2_ADC_H
    +#define _DT_BINDINGS_IIO_ADC_AT91_SAMA5D2_ADC_H
    +
    +/* X relative position channel index */
    +#define AT91_SAMA5D2_ADC_X_CHANNEL 24
    +/* Y relative position channel index */
    +#define AT91_SAMA5D2_ADC_Y_CHANNEL 25
    +/* pressure channel index */
    +#define AT91_SAMA5D2_ADC_P_CHANNEL 26
    +
    +#endif
    --
    2.7.4
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