[v6,07/10] DMA: pl330: add max burst for dmaengine
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Message ID 1444872974-2466-1-git-send-email-shawn.lin@rock-chips.com
State New
Headers show

Commit Message

Shawn Lin Oct. 15, 2015, 1:36 a.m. UTC
This patch add max burst capability for dmaengine and
limit burst capability to one for PL330_QUIRK_BROKEN_NO_FLUSHP

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>

---

Changes in v6:
- remove expose quirks and add max_burst for dmaengine

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
Changes in v1: None

 drivers/dma/pl330.c | 3 +++
 1 file changed, 3 insertions(+)

Patch
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diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 008408d..1b0453b 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -33,6 +33,7 @@ 
 #define PL330_MAX_CHAN		8
 #define PL330_MAX_IRQS		32
 #define PL330_MAX_PERI		32
+#define PL330_MAX_BURST         16
 
 #define PL330_QUIRK_BROKEN_NO_FLUSHP BIT(0)
 
@@ -2938,6 +2939,8 @@  pl330_probe(struct amba_device *adev, const struct amba_id *id)
 	pd->dst_addr_widths = PL330_DMA_BUSWIDTHS;
 	pd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
 	pd->residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
+	pd->max_burst = ((pl330->quirks & PL330_QUIRK_BROKEN_NO_FLUSHP) ?
+			 1 : PL330_MAX_BURST);
 
 	ret = dma_async_device_register(pd);
 	if (ret) {