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authorLee Jones <lee.jones@linaro.org>2013-05-15 13:52:01 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-06-04 13:12:12 +0400
commitfd59f9e6abf2ebf0098c616e1742168db4360d13 (patch)
tree1ba336a7af369ab8263a7beb3c9869631fd11076 /drivers/dma/ste_dma40.c
parent0117f7c7a3e8cdf72bea7d463b142db35e9c9cdc (diff)
downloadlinux-fd59f9e6abf2ebf0098c616e1742168db4360d13.tar.xz
dmaengine: ste_dma40: Fetch the number of physical channels from DT
Some platforms insist on obscure physical channel availability. This information is currently passed though platform data in internal BSP kernels. Once those platforms land, they'll need to configure them appropriately, so we may as well add the infrastructure. Cc: Dan Williams <djbw@fb.com> Cc: Per Forlin <per.forlin@stericsson.com> Cc: Rabin Vincent <rabin@rab.in> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/dma/ste_dma40.c')
-rw-r--r--drivers/dma/ste_dma40.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index ae462d352110..4e528dd30ad5 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -3482,7 +3482,7 @@ static int __init d40_of_probe(struct platform_device *pdev,
struct device_node *np)
{
struct stedma40_platform_data *pdata;
- int num_memcpy = 0;
+ int num_phy = 0, num_memcpy = 0;
const const __be32 *list;
pdata = devm_kzalloc(&pdev->dev,
@@ -3491,6 +3491,11 @@ static int __init d40_of_probe(struct platform_device *pdev,
if (!pdata)
return -ENOMEM;
+ /* If absent this value will be obtained from h/w. */
+ of_property_read_u32(np, "dma-channels", &num_phy);
+ if (num_phy > 0)
+ pdata->num_of_phy_chans = num_phy;
+
list = of_get_property(np, "memcpy-channels", &num_memcpy);
num_memcpy /= sizeof(*list);