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authorPer Forlin <per.forlin@stericsson.com>2011-10-18 18:39:47 +0200
committerFabio Baltieri <fabio.baltieri@linaro.org>2013-01-14 10:50:18 +0100
commitb96710e5b22609aa6e4ba5c3936ea7f026a7c427 (patch)
treec738ab582345c0b88c2bbc5310d0e799c3a082b2 /drivers/dma
parent8a5d2039ab9050a8a2e649eaf3ca4e372a7709f1 (diff)
dmaengine: ste_dma40: set dma max seg size
Maximum DMA seg size is (0xffff x data_width). If max seg size is not set it deafults to 64k. This results in failure if transferring 64k in byte mode. Large seg sizes may be supported by splitting large transfer. Signed-off-by: Per Forlin <per.forlin@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/ste_dma40.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 23c5573e62d..f5724d95ed4 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -344,6 +344,7 @@ struct d40_base {
int irq;
int num_phy_chans;
int num_log_chans;
+ struct device_dma_parameters dma_parms;
struct dma_device dma_both;
struct dma_device dma_slave;
struct dma_device dma_memcpy;
@@ -3362,6 +3363,13 @@ static int __init d40_probe(struct platform_device *pdev)
if (err)
goto failure;
+ base->dev->dma_parms = &base->dma_parms;
+ err = dma_set_max_seg_size(base->dev, STEDMA40_MAX_SEG_SIZE);
+ if (err) {
+ d40_err(&pdev->dev, "Failed to set dma max seg size\n");
+ goto failure;
+ }
+
d40_hw_init(base);
dev_info(base->dev, "initialized\n");