usb: gadget: udc: core: add usb_gadget_{un}map_request_by_dev()

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If the following environment, the first argument of DMA API should
be set to a DMAC's device structure, not a udc controller's one.
 - A udc controller needs an external DMAC device (like a DMA Engine).
 - The external DMAC enables IOMMU.

So, this patch add usb_gadget_{un}map_request_by_dev() API to set
a DMAC's device structure by a udc controller driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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Yoshihiro Shimoda 2016-04-18 16:53:39 +09:00 • committed by Felipe Balbi

parent 5096c4d3bf

commit 679ca39fc6

2 changed files with 22 additions and 6 deletions

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4

include/linux/usb/gadget.h

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