usb: renesas_usbhs: add support for requesting DT DMA

[deliverable/linux.git] / drivers / usb / renesas_usbhs / fifo.c

diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index f46271ce1b15afdb211e6951b2adeb3a3a328e8e..4c086b1cda0495daa110ffb741f1ba8865015046 100644 (file)
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -1054,10 +1054,8 @@ static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
        fifo->rx_chan = NULL;
 }
 
-static void usbhsf_dma_init(struct usbhs_priv *priv,
-                           struct usbhs_fifo *fifo)
+static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo)
 {
-       struct device *dev = usbhs_priv_to_dev(priv);
        dma_cap_mask_t mask;
 
        dma_cap_zero(mask);
@@ -1069,6 +1067,23 @@ static void usbhsf_dma_init(struct usbhs_priv *priv,
        dma_cap_set(DMA_SLAVE, mask);
        fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
                                            &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)
                dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",