Messages in this thread Patch in this message | | | From | Jamie Iles <> | Subject | [PATCH 3/4] dmaengine/dw_dmac: provide a mechanism to indicate private devices | Date | Tue, 23 Nov 2010 11:06:10 +0000 |
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Some platforms (e.g. Picochip PC3XX) have multiple DMA controllers where some may be used for slave transfers and others for general purpose memcpy type transfers. Add a .is_private boolean to the platform data structure so that controllers can be marked as private so that the DMA_PRIVATE capability will be set for that controller.
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jamie Iles <jamie.iles@picochip.com> --- drivers/dma/dw_dmac.c | 2 ++ include/linux/dw_dmac.h | 3 +++ 2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 64024f1..bea304b 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -1341,6 +1341,8 @@ static int __init dw_probe(struct platform_device *pdev) dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask); dma_cap_set(DMA_SLAVE, dw->dma.cap_mask); + if (pdata->is_private) + dma_cap_set(DMA_PRIVATE, dw->dma.cap_mask); dw->dma.dev = &pdev->dev; dw->dma.device_alloc_chan_resources = dwc_alloc_chan_resources; dw->dma.device_free_chan_resources = dwc_free_chan_resources; diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h index 8014eb8..deec66b 100644 --- a/include/linux/dw_dmac.h +++ b/include/linux/dw_dmac.h @@ -16,9 +16,12 @@ /** * struct dw_dma_platform_data - Controller configuration parameters * @nr_channels: Number of channels supported by hardware (max 8) + * @is_private: The device channels should be marked as private and not for + * by the general purpose DMA channel allocator. */ struct dw_dma_platform_data { unsigned int nr_channels; + bool is_private; }; /** -- 1.7.2.3
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