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-rw-r--r--drivers/dma/dw_dmac.c6
-rw-r--r--include/linux/dw_dmac.h3
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 6ab440e532bf..f413e123405a 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -1319,7 +1319,11 @@ static int __init dw_probe(struct platform_device *pdev)
dwc->chan.device = &dw->dma;
dwc->chan.cookie = dwc->completed = 1;
dwc->chan.chan_id = i;
- list_add_tail(&dwc->chan.device_node, &dw->dma.channels);
+ if (pdata->chan_allocation_order == CHAN_ALLOCATION_ASCENDING)
+ list_add_tail(&dwc->chan.device_node,
+ &dw->dma.channels);
+ else
+ list_add(&dwc->chan.device_node, &dw->dma.channels);
dwc->ch_regs = &__dw_regs(dw)->CHAN[i];
spin_lock_init(&dwc->lock);
diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h
index deec66b37180..a18c498984d9 100644
--- a/include/linux/dw_dmac.h
+++ b/include/linux/dw_dmac.h
@@ -22,6 +22,9 @@
struct dw_dma_platform_data {
unsigned int nr_channels;
bool is_private;
+#define CHAN_ALLOCATION_ASCENDING 0 /* zero to seven */
+#define CHAN_ALLOCATION_DESCENDING 1 /* seven to zero */
+ unsigned char chan_allocation_order;
};
/**