[PATCH v6 07/10] DMA: pl330: add max burst for dmaengine

Shawn Lin
2015-10-15T01:37:29Z

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(+)

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) {
--
2.3.7