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@xxxxxx>
---
drivers/dma/edma.c | 6 ++++++
include/linux/platform_data/edma.h | 7 +++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 0675e268d577..46b305ea0d21 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -2297,6 +2297,12 @@ static int edma_probe(struct platform_device *pdev)
edma_set_chmap(&ecc->slave_chans[i], ecc->dummy_slot);
}
+ if (info->slave_map) {
+ ecc->dma_slave.filter_map.map = info->slave_map;
+ ecc->dma_slave.filter_map.mapcnt = info->slavecnt;
+ ecc->dma_slave.filter_map.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);
diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h
index e2878baeb90e..105700e62ea1 100644
--- a/include/linux/platform_data/edma.h
+++ b/include/linux/platform_data/edma.h
@@ -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
--
2.6.3
--
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