linux-kernel - Re: [PATCH 1/2] dmaengine: mpc512x_dma: use generic DMA DT bindings

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Date:	Tue, 9 Apr 2013 13:42:36 +0200
From:	Anatolij Gustschin <agust@...x.de>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Vinod Koul <vinod.koul@...el.com>, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 1/2] dmaengine: mpc512x_dma: use generic DMA DT bindings

On Mon, 08 Apr 2013 12:46:47 +0200
Lars-Peter Clausen <lars@...afoo.de> wrote:
...
> > +static struct dma_chan *mpc_dma_xlate(struct of_phandle_args *dma_spec,
> > +						struct of_dma *ofdma)
> > +{
> > +	int count = dma_spec->args_count;
> > +	struct mpc_dma *mdma = ofdma->of_dma_data;
> > +	struct mpc_dma_filter_args fargs;
> > +	dma_cap_mask_t cap;
> > +
> > +	if (!mdma)
> > +		return NULL;
> > +
> > +	if (count != 1)
> > +		return NULL;
> > +
> > +	fargs.mdma = mdma;
> > +	fargs.chan_id = dma_spec->args[0];
> > +
> > +	dma_cap_zero(cap);
> > +	dma_cap_set(DMA_SLAVE, cap);
> > +
> > +	return dma_request_channel(cap, mpc_dma_filter, &fargs);
> > +}
> > +
> 
> This is more or less the same as the generic of_dma_xlate_by_chan_id
> function I posted about two weeks ago:
> https://patchwork.kernel.org/patch/2331091/

Thanks. I can use the generic of_dma_xlate_by_chan_id() when above patch
will be accepted.

Anatolij
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