diff options
Diffstat (limited to 'Documentation/devicetree/bindings/dma/snps-dma.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/snps-dma.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/dma/snps-dma.txt b/Documentation/devicetree/bindings/dma/snps-dma.txt index c261598164a7..4775c66f4508 100644 --- a/Documentation/devicetree/bindings/dma/snps-dma.txt +++ b/Documentation/devicetree/bindings/dma/snps-dma.txt @@ -13,6 +13,11 @@ Required properties: - chan_priority: priority of channels. 0 (default): increase from chan 0->n, 1: increase from chan n->0 - block_size: Maximum block size supported by the controller +- data-width: Maximum data width supported by hardware per AHB master + (in bytes, power of 2) + + +Deprecated properties: - data_width: Maximum data width supported by hardware per AHB master (0 - 8bits, 1 - 16bits, ..., 5 - 256bits) @@ -22,6 +27,8 @@ Optional properties: that services interrupts for this device - is_private: The device channels should be marked as private and not for by the general purpose DMA channel allocator. False if not passed. +- multi-block: Multi block transfers supported by hardware. Array property with + one cell per channel. 0: not supported, 1 (default): supported. Example: @@ -38,7 +45,7 @@ Example: chan_allocation_order = <1>; chan_priority = <1>; block_size = <0xfff>; - data_width = <3 3>; + data-width = <8 8>; }; DMA clients connected to the Designware DMA controller must use the format @@ -47,8 +54,8 @@ The four cells in order are: 1. A phandle pointing to the DMA controller 2. The DMA request line number -3. Source master for transfers on allocated channel -4. Destination master for transfers on allocated channel +3. Memory master for transfers on allocated channel +4. Peripheral master for transfers on allocated channel Example: |