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-rw-r--r--dts/Bindings/dma/dma.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/dts/Bindings/dma/dma.txt b/dts/Bindings/dma/dma.txt
index 6312fb0..eeb4e4d 100644
--- a/dts/Bindings/dma/dma.txt
+++ b/dts/Bindings/dma/dma.txt
@@ -16,6 +16,9 @@ Optional properties:
- dma-channels: Number of DMA channels supported by the controller.
- dma-requests: Number of DMA request signals supported by the
controller.
+- dma-channel-mask: Bitmask of available DMA channels in ascending order
+ that are not reserved by firmware and are available to
+ the kernel. i.e. first channel corresponds to LSB.
Example:
@@ -29,6 +32,7 @@ Example:
#dma-cells = <1>;
dma-channels = <32>;
dma-requests = <127>;
+ dma-channel-mask = <0xfffe>
};
* DMA router