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authorFrank Li <Frank.Li@nxp.com>2022-05-24 10:21:58 -0500
committerBjorn Helgaas <bhelgaas@google.com>2022-06-23 14:56:34 -0500
commitd6b03171f9fc8127b3a7adfd4e74ee5d4dae5d14 (patch)
treef0312c58ae1ca605751f44e9a3e789f79f07e626 /drivers/dma
parentc1e33979171da63cf47e56243ccb8ba82363c7d3 (diff)
dmaengine: dw-edma: Add support for chip-specific flags
Add a "flags" field to the "struct dw_edma_chip" so that the controller drivers can pass flags that are relevant to the platform. DW_EDMA_CHIP_LOCAL - Used by the controller drivers accessing eDMA locally. Local eDMA access doesn't require generating MSIs to the remote. Link: https://lore.kernel.org/r/20220524152159.2370739-8-Frank.Li@nxp.com Tested-by: Serge Semin <fancer.lancer@gmail.com> Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Serge Semin <fancer.lancer@gmail.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Acked-By: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dw-edma/dw-edma-v0-core.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c
index 403ade40c1b1..607647dacc29 100644
--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -301,6 +301,7 @@ u32 dw_edma_v0_core_status_abort_int(struct dw_edma *dw, enum dw_edma_dir dir)
static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
{
struct dw_edma_burst *child;
+ struct dw_edma_chan *chan = chunk->chan;
struct dw_edma_v0_lli __iomem *lli;
struct dw_edma_v0_llp __iomem *llp;
u32 control = 0, i = 0;
@@ -314,9 +315,11 @@ static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk)
j = chunk->bursts_alloc;
list_for_each_entry(child, &chunk->burst->list, list) {
j--;
- if (!j)
- control |= (DW_EDMA_V0_LIE | DW_EDMA_V0_RIE);
-
+ if (!j) {
+ control |= DW_EDMA_V0_LIE;
+ if (!(chan->dw->chip->flags & DW_EDMA_CHIP_LOCAL))
+ control |= DW_EDMA_V0_RIE;
+ }
/* Channel control */
SET_LL_32(&lli[i].control, control);
/* Transfer size */