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Commit abd2dbf6 authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Felipe Balbi
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usb: renesas_usbhs: add support for requesting DT DMA 



This patch adds dma_request_slave_channel_reason() calling to request
dma slave channels for multiplatform environment.

Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 6e3f53ab

Documentation/devicetree/bindings/usb/renesas_usbhs.txt

+2 −0
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ Optional properties: 
			 function should be enabled

  - phys: phandle + phy specifier pair

  - phy-names: must be "usb"

  - dmas: Must contain a list of references to DMA specifiers.

  - dma-names : Must contain a list of DMA names, "tx" or "rx".



Example:

	usbhs: usb@e6590000 {

drivers/usb/renesas_usbhs/fifo.c

+10 −1
Original line number Diff line number Diff line
@@ -1069,11 +1069,20 @@ static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo) 
					    &fifo->rx_slave);

}



static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo)

{

	fifo->tx_chan = dma_request_slave_channel_reason(dev, "tx");

	fifo->rx_chan = dma_request_slave_channel_reason(dev, "rx");

}



static void usbhsf_dma_init(struct usbhs_priv *priv,

			    struct usbhs_fifo *fifo)

{

	struct device *dev = usbhs_priv_to_dev(priv);



	if (dev->of_node)

		usbhsf_dma_init_dt(dev, fifo);

	else

		usbhsf_dma_init_pdev(fifo);



	if (fifo->tx_chan || fifo->rx_chan)