[PATCH V3 1/2] of: Add generic device tree DMA helpers

Arnd Bergmann arnd at arndb.de
Tue Jul 24 15:27:04 EDT 2012

On Tuesday 24 July 2012, Jon Hunter wrote:
> Ok. The thought was that the user would have the following means of
> requesting a channel ...
> 1. By name
> 2. By a filter parameter (flags)
> 3. By name and a filter parameter
> So we would have the following APIs ...
> struct dma_chan
> *of_dma_request_channel(struct device_node *node, unsigned int flags);
> struct dma_chan
> *of_dma_request_named channel(struct device_node *node, char *name,
> unsigned int flags);
> In both of these the filter parameter flags is optional.
> Let me know your thoughts on this.

I definitely like this version. I was thinking of a different variant
where we have separate functions for each flag value, but I think yours
is actually better.


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