Not all controllers using the A31 SPDIF binding actually have some RX capabilities, and therefore on some controllers we don't have the option to set an RX DMA channel.
This was already done in the DTSI, but the binding itself was never updated.
Signed-off-by: Maxime Ripard maxime.ripard@bootlin.com --- Documentation/devicetree/bindings/sound/allwinner,sun6i-a31-spdif.yaml | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun6i-a31-spdif.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun6i-a31-spdif.yaml index 7329d9fcf34c..800f794fafe0 100644 --- a/Documentation/devicetree/bindings/sound/allwinner,sun6i-a31-spdif.yaml +++ b/Documentation/devicetree/bindings/sound/allwinner,sun6i-a31-spdif.yaml @@ -44,14 +44,24 @@ properties: - const: spdif
dmas: + minItems: 1 + maxItems: 2 items: - description: RX DMA Channel - description: TX DMA Channel + description: + Some controllers cannot receive but can only transmit data. In + such a case, the RX DMA channel is to be omitted.
dma-names: - items: - - const: rx - - const: tx + minItems: 1 + maxItems: 2 + enum: + - rx + - tx + description: + Some controllers cannot receive but can only transmit data. In + such a case, the RX name is to be omitted.
resets: maxItems: 1