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

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

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Ujfalusi 2015-12-14 22:47:41 +02:00 committed by Vinod Koul
parent a8135d0d79
commit 23e6723c06
2 changed files with 11 additions and 0 deletions
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4
drivers/dma/edma.c
View file

@ -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);

7
include/linux/platform_data/edma.h
View file

@ -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