diff mbox

[4/5] dmaengine: ste_dma40: Fetch the number of physical channels from DT

Message ID 1367336497-10650-4-git-send-email-lee.jones@linaro.org
State New
Headers show

Commit Message

Lee Jones April 30, 2013, 3:41 p.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 4769141..dbdd67b 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -3464,7 +3464,7 @@  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;
 
 	pdata = devm_kzalloc(&pdev->dev,
 			     sizeof(struct stedma40_platform_data),
@@ -3472,6 +3472,11 @@  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;
+
 	of_property_read_u32(np, "memcpy-num-chans", &num_memcpy);
 
 	if (num_memcpy > D40_MEMCPY_MAX_CHANS || num_memcpy <= 0) {