openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Yoshihiro Shimoda 2015-01-19 12:53:17 +09:00 committed by Felipe Balbi
parent 6e3f53ab5b
commit abd2dbf6bb
2 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/usb/renesas_usbhs.txt
View File

@ -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 {

11
drivers/usb/renesas_usbhs/fifo.c
View File

@ -1069,12 +1069,21 @@ 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);
usbhsf_dma_init_pdev(fifo);
if (dev->of_node)
usbhsf_dma_init_dt(dev, fifo);
else
usbhsf_dma_init_pdev(fifo);
if (fifo->tx_chan || fifo->rx_chan)
dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",