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    Subject[PATCH v4 3/3] spi: dt-bindings: document zero value for spi-{rx,tx}-bus-width properties
    Date
    Following a change to the SPI framework, providing a value of zero for
    'spi-rx-bus-width' and 'spi-tx-bus-width' is now possible and will
    essentially mean that no RX or TX is allowed.

    Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
    ---

    Changelog v3 -> v4:
    * https://lore.kernel.org/linux-spi/20201127130834.136348-3-alexandru.ardelean@analog.com/
    * fix typos

    Documentation/devicetree/bindings/spi/spi-controller.yaml | 6 ++++--
    1 file changed, 4 insertions(+), 2 deletions(-)

    diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
    index 1b56d5e40f1f..cf663e4a4afe 100644
    --- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
    +++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
    @@ -125,8 +125,9 @@ patternProperties:
    spi-rx-bus-width:
    description:
    Bus width to the SPI bus used for read transfers.
    + If 0 is provided, then no RX will be possible on this device.
    $ref: /schemas/types.yaml#/definitions/uint32
    - enum: [1, 2, 4, 8]
    + enum: [0, 1, 2, 4, 8]
    default: 1

    spi-rx-delay-us:
    @@ -136,8 +137,9 @@ patternProperties:
    spi-tx-bus-width:
    description:
    Bus width to the SPI bus used for write transfers.
    + If 0 is provided, then no TX will be possible on this device.
    $ref: /schemas/types.yaml#/definitions/uint32
    - enum: [1, 2, 4, 8]
    + enum: [0, 1, 2, 4, 8]
    default: 1

    spi-tx-delay-us:
    --
    2.17.1
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