提交 fd59f9e6 编写于 作者: L Lee Jones 提交者: Linus Walleij

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: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
上级 0117f7c7
无相关合并请求
......@@ -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);
......
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