Extend the binding to support specifying a different request type for
each direction.
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/dma/ingenic,dma.yaml | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/dma/ingenic,dma.yaml b/Documentation/devicetree/bindings/dma/ingenic,dma.yaml
index f45fd5235879..51b41e4795a2 100644
--- a/Documentation/devicetree/bindings/dma/ingenic,dma.yaml
+++ b/Documentation/devicetree/bindings/dma/ingenic,dma.yaml
@@ -44,13 +44,17 @@ properties:
maxItems: 1
"#dma-cells":
- const: 2
+ enum: [2, 3]
description: >
DMA clients must use the format described in dma.txt, giving a phandle
- to the DMA controller plus the following 2 integer cells:
+ to the DMA controller plus the following integer cells:
- Request type: The DMA request type for transfers to/from the
device on the allocated channel, as defined in the SoC documentation.
+ If "#dma-cells" is 2, the request type is a single cell. If
+ "#dma-cells" is 3, the request type has two cells; the first one
+ corresponds to the host to device direction, the second one corresponds
+ to the device to host direction.
- Channel: If set to 0xffffffff, any available channel will be allocated
for the client. Otherwise, the exact channel specified will be used.
--
2.33.0
