From 766b540df8a374f75d7ad7084da026439c107825 Mon Sep 17 00:00:00 2001 From: Radhey Shyam Pandey Date: Thu, 14 Apr 2022 17:54:21 +0530 Subject: [PATCH] dt-bindings: dmaengine: xilinx_dma: Add MCMDA channel ID index description MCDMA IP provides up to 16 multiple channels of data movement each on MM2S and S2MM paths. Inline with implementation, in the binding add description for the channel ID start index and mention that it's fixed irrespective of the MCDMA IP configuration(number of read/write channels). Signed-off-by: Radhey Shyam Pandey Acked-by: Rob Herring Link: https://lore.kernel.org/r/1649939061-6675-1-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul --- Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt index 325aca5..d1700a5 100644 --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt @@ -110,7 +110,11 @@ axi_vdma_0: axivdma@40030000 { Required properties: - dmas: a list of <[Video DMA device phandle] [Channel ID]> pairs, where Channel ID is '0' for write/tx and '1' for read/rx - channel. + channel. For MCMDA, MM2S channel(write/tx) ID start from + '0' and is in [0-15] range. S2MM channel(read/rx) ID start + from '16' and is in [16-31] range. These channels ID are + fixed irrespective of IP configuration. + - dma-names: a list of DMA channel names, one per "dmas" entry Example: -- 2.7.4