diff mbox

[38/39] dmaengine: ste_dma40: Fetch the number of physical channels from DT

Message ID 1368611522-9984-39-git-send-email-lee.jones@linaro.org
State Accepted
Commit fd59f9e6abf2ebf0098c616e1742168db4360d13
Headers show

Commit Message

Lee Jones May 15, 2013, 9:52 a.m. UTC 
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: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/dma/ste_dma40.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index ae462d3..4e528dd 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);