[U-Boot] [PATCH v3 2/4] usb: host: xhci-dwc3: Add dual role mode support from DT

[patrice.chotard at st.com <patrice.chotard@st.com>]

From: Patrice Chotard <patrice.chotard@st.com>

DWC3 dual role mode is selected using DT "dr_mode"
property. If not found, DWC3 controller is configured
in HOST mode by default

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

---

v3:	_ none
v2:	_ none

 drivers/usb/host/xhci-dwc3.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index ab75fb7..8367ba2 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -15,6 +15,7 @@
 #include "xhci.h"
 #include <asm/io.h>
 #include <linux/usb/dwc3.h>
+#include <linux/usb/otg.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -114,6 +115,7 @@ static int xhci_dwc3_probe(struct udevice *dev)
 	struct xhci_hcor *hcor;
 	struct xhci_hccr *hccr;
 	struct dwc3 *dwc3_reg;
+	enum usb_dr_mode dr_mode;
 
 	hccr = (struct xhci_hccr *)dev_get_addr(dev);
 	hcor = (struct xhci_hcor *)((phys_addr_t)hccr +
@@ -123,6 +125,13 @@ static int xhci_dwc3_probe(struct udevice *dev)
 
 	dwc3_core_init(dwc3_reg);
 
+	dr_mode = usb_get_dr_mode(dev_of_offset(dev));
+	if (dr_mode == USB_DR_MODE_UNKNOWN)
+		/* by default set dual role mode to HOST */
+		dr_mode = USB_DR_MODE_HOST;
+
+	dwc3_set_mode(dwc3_reg, dr_mode);
+
 	return xhci_register(dev, hccr, hcor);
 }
 
-- 
1.9.1