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Commit a80258f9 authored by Padmavathi Venna's avatar Padmavathi Venna Committed by Vinod Koul
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DMA: PL330: Add xlate function 



Add xlate to translate the device-tree binding information into
the appropriate format. The filter function requires the dma
controller device and dma channel number as filter_params.

Signed-off-by: default avatarPadmavathi Venna <padma.v@samsung.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 34d19355

drivers/dma/pl330.c

+25 −0
Original line number Original line Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/amba/pl330.h>

#include <linux/amba/pl330.h>

#include <linux/scatterlist.h>

#include <linux/scatterlist.h>

#include <linux/of.h>

#include <linux/of.h>

#include <linux/of_dma.h>





#include "dmaengine.h"

#include "dmaengine.h"

#define PL330_MAX_CHAN		8

#define PL330_MAX_CHAN		8
@@ -2379,6 +2380,30 @@ bool pl330_filter(struct dma_chan *chan, void *param) 
}

}

EXPORT_SYMBOL(pl330_filter);

EXPORT_SYMBOL(pl330_filter);





static struct dma_chan *of_dma_pl330_xlate(struct of_phandle_args *dma_spec,

						struct of_dma *ofdma)

{

	int count = dma_spec->args_count;

	struct dma_pl330_dmac *pdmac = ofdma->of_dma_data;

	struct dma_pl330_filter_args fargs;

	dma_cap_mask_t cap;



	if (!pdmac)

		return NULL;



	if (count != 1)

		return NULL;



	fargs.pdmac = pdmac;

	fargs.chan_id = dma_spec->args[0];



	dma_cap_zero(cap);

	dma_cap_set(DMA_SLAVE, cap);

	dma_cap_set(DMA_CYCLIC, cap);



	return dma_request_channel(cap, pl330_dt_filter, &fargs);

}



static int pl330_alloc_chan_resources(struct dma_chan *chan)

static int pl330_alloc_chan_resources(struct dma_chan *chan)

{

{

	struct dma_pl330_chan *pch = to_pchan(chan);

	struct dma_pl330_chan *pch = to_pchan(chan);