[PATCH RFC 1/7] dma: pl08x: Add support for the DMA slave map

[Sylwester Nawrocki]

On 11/07/2016 08:55 PM, Arnd Bergmann wrote:
>> diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
>> > index d5c75c8..0d1eb2e 100644
>> > --- a/drivers/dma/amba-pl08x.c
>> > +++ b/drivers/dma/amba-pl08x.c
>> > @@ -1793,6 +1793,23 @@ bool pl08x_filter_id(struct dma_chan *chan, void *chan_id)
>> >  }
[...]
>> > +static bool pl08x_filter_fn(struct dma_chan *chan, void *chan_id)
>> > +{
>> > +       struct pl08x_dma_chan *plchan;
[...]
>> > +       plchan = to_pl08x_chan(chan);
>> > +
>> > +       /* Check that the channel is not taken! */
>> > +       if (plchan->cd == chan_id)
>> > +               return true;
> 
> What I had in mind was a bit different: Instead of comparing the
> channel, I was thinking of modifying the channel itself, something
> like:
> 
> 	plchan->signal = chan_id->signal;
> 	plchan->periph_buses = chan_id->periph_buses;
> 
> after that, remove the plchan->cd data. Unfortunately, the muxing in
> arch/arm/mach-spear/ makes this a bit harder. I'd have to think
> about it some more. It may be easier to do this after moving
> spear and lpc32xx over to use dma_slave_map.

I've posted updated version of this patch, please let me know
if you have any further comments.

-- 
Thanks,
Sylwester