On 09/14/2012 11:28 AM, Stephen Warren wrote: > On 09/13/2012 04:00 PM, Jon Hunter wrote: >> This is based upon the work by Benoit Cousson [1] and Nicolas Ferre [2] >> to add some basic helpers to retrieve a DMA controller device_node and the >> DMA request/channel information. > >> diff --git a/Documentation/devicetree/bindings/dma/dma.txt b/Documentation/devicetree/bindings/dma/dma.txt > >> +* Generic DMA Controller and DMA request bindings >> + >> +Generic binding to provide a way for a driver using DMA Engine to retrieve the >> +DMA request or channel information that goes from a hardware device to a DMA >> +controller. >> + >> + >> +* DMA controller >> + >> +Required property: >> +- #dma-cells: Must be at least 1. Used to provide DMA controller >> + specific information. See DMA client binding below for > ... >> +* DMA client >> + >> +Client drivers should specify the DMA property using a phandle to the controller >> +followed by DMA controller specific data. >> + >> +Required property: >> +- dmas: List of one or more DMA specifiers, each consisting of >> + - A phandle pointing to DMA controller node >> + - A single integer cell containing DMA controller >> + specific information. This typically contains a dma >> + request line number or a channel number, but can >> + contain any data that is used required for configuring >> + a channel. > > "A single integer cell" doesn't sound correct; shouldn't this be > something like "a number of integer cells, as determined by the > #dma-cells property in the node referenced by phandle"? Thanks for catching that. I had been re-working this a few times and must have forgotten to update that. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
