[PATCH 6/7] dt-bindings: dmaengine: at_xdmac: add optional microchip,m2m property

Eugen Hristev
2020-09-14T14:12:30Z

Add optional microchip,m2m property that specifies if a controller is
dedicated to memory to memory operations only.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
Documentation/devicetree/bindings/dma/atmel-xdma.txt | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/atmel-xdma.txt b/Documentation/devicetree/bindings/dma/atmel-xdma.txt
index 510b7f25ba24..642da6b95a29 100644
--- a/Documentation/devicetree/bindings/dma/atmel-xdma.txt
+++ b/Documentation/devicetree/bindings/dma/atmel-xdma.txt
@@ -15,6 +15,12 @@ the dmas property of client devices.
interface identifier,
- bit 30-24: PERID, peripheral identifier.

+Optional properties:
+- microchip,m2m: this controller is connected on AXI only to memory and it's
+ dedicated to memory to memory DMA operations. If this option is
+ missing, it's assumed that the DMA controller is connected to
+ peripherals, thus it's a per2mem and mem2per.
+
Example:

dma1: dma-controller@f0004000 {
--
2.25.1