From mboxrd@z Thu Jan 1 00:00:00 1970 From: lee.jones@linaro.org (Lee Jones) Date: Fri, 3 May 2013 15:32:48 +0100 Subject: [PATCH 62/63] dmaengine: ste_dma40: Fetch the number of physical channels from DT In-Reply-To: <1367591569-32197-1-git-send-email-lee.jones@linaro.org> References: <1367591569-32197-1-git-send-email-lee.jones@linaro.org> Message-ID: <1367591569-32197-63-git-send-email-lee.jones@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Cc: Dan Williams Cc: Per Forlin Cc: Rabin Vincent Signed-off-by: Lee Jones --- 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 bd5b156..ee96acb 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -3468,7 +3468,7 @@ 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, @@ -3477,6 +3477,11 @@ 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