Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 23e6723c authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
Browse files

dmaengine: edma: Add support for DMA filter mapping to slave devices 



Add support for providing device to filter_fn mapping so client drivers
can switch to use the dma_request_chan() API.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent a8135d0d

drivers/dma/edma.c

+4 −0
Original line number Diff line number Diff line
@@ -2297,6 +2297,10 @@ static int edma_probe(struct platform_device *pdev) 
		edma_set_chmap(&ecc->slave_chans[i], ecc->dummy_slot);

	}



	ecc->dma_slave.filter.map = info->slave_map;

	ecc->dma_slave.filter.mapcnt = info->slavecnt;

	ecc->dma_slave.filter.fn = edma_filter_fn;



	ret = dma_async_device_register(&ecc->dma_slave);

	if (ret) {

		dev_err(dev, "slave ddev registration failed (%d)\n", ret);

include/linux/platform_data/edma.h

+7 −0
Original line number Diff line number Diff line
@@ -53,12 +53,16 @@ enum dma_event_q { 
#define EDMA_CTLR(i)			((i) >> 16)

#define EDMA_CHAN_SLOT(i)		((i) & 0xffff)



#define EDMA_FILTER_PARAM(ctlr, chan)	((int[]) { EDMA_CTLR_CHAN(ctlr, chan) })



struct edma_rsv_info {



	const s16	(*rsv_chans)[2];

	const s16	(*rsv_slots)[2];

};



struct dma_slave_map;



/* platform_data for EDMA driver */

struct edma_soc_info {

	/*
@@ -76,6 +80,9 @@ struct edma_soc_info { 


	s8	(*queue_priority_mapping)[2];

	const s16	(*xbar_chans)[2];



	const struct dma_slave_map *slave_map;

	int slavecnt;

};



#endif