Hi Peter

On Mon, Dec 10, 2018 at 8:55 PM Pawel Laszczak [off-list ref] wrote:

quoted

This patch introduce new Cadence USBSS DRD driver
to linux kernel.

The Cadence USBSS DRD Driver is a highly
configurable IP Core which can be
instantiated as Dual-Role Device (DRD),
Peripheral Only and Host Only (XHCI)
configurations.

The current driver has been validated with
FPGA burned. We have support for PCIe
bus, which is used on FPGA prototyping.

The host side of USBSS-DRD controller is compliance
with XHCI specification, so it works with
standard XHCI linux driver.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
---

I have compiled it at my ARM64 platform, and will give you more feedback after
adding platform support. Below is one compile warning, please fix

 CC      drivers/usb/cdns3/host.o
 AR      drivers/usb/cdns3/cdns3-pci.o
/home/b29397/work/projects/linux-imx/drivers/usb/cdns3/gadget.c: In
function ‘cdns3_gadget_ep_disable’:
/home/b29397/work/projects/linux-imx/drivers/usb/cdns3/gadget.c:1122:19:
warning: ‘priv_dev’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
  dev_dbg(priv_dev->dev, "usbss: invalid parameters\n");
                  ^~
 AR      drivers/usb/cdns3/cdns3.o

I found this also. Some time ago I changed 
pr_err("usbss: invalid parameters\n");  
to
dev_err(priv_dev->dev, "usbss: invalid parameters\n");    

In cdns3_gadget_ep_disable function and it was mistake. 

I don't know why I didn't see this warning before posting patch.

Cheers 
Pawel