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SubjectRe: [PATCH 38/39] dmaengine: ste_dma40: Fetch the number of physical channels from DT
On Wed, May 15, 2013 at 10:52:01AM +0100, Lee Jones wrote:
> 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>
> ---
Acked-by: Vinod Koul <vinod.koul@intel.com>

> drivers/dma/ste_dma40.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> 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);
>
> --
> 1.7.10.4
>


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