[Linux-stm32] [PATCH V4 21/22] ARM: dts: stm32: Add bindings for USB on AV96

[Marek Vasut]

On 4/6/20 1:08 PM, Marek Vasut wrote:
> On 4/6/20 9:22 AM, Manivannan Sadhasivam wrote:
>> On Wed, Apr 01, 2020 at 03:22:36PM +0200, Marek Vasut wrote:
>>> Fill in the bindings for USB host and gadget on AV96.
>>>
>>> Signed-off-by: Marek Vasut <marex at denx.de>
>>
>> I can't get the USB B-Micro OTG port to work with this patch. Do I need to
>> enable any configs other than PHY and USB DWC2 drivers?
> 
> Only the DWC2 GADGET (and possibly host, for dual-role) and some gadget
> implementation (e.g. gadget zero).

I think I see what doesn't work for you.

It seems the following works on next:
power on -> plug in USB stick (or any other USB device) -> unplug ->
plug in usb host (e.g. PC)

But this does not:
power on -> plug in usb host (e.g. PC)
 - the PC is not detected

Did that ^ ever work for you before ? I suspect this is a bug in the
DWC2 driver. The OTG operation there is known to be flaky at best.