[U-Boot] [PATCH] dm: usb: gadget: Fix boot breakage on sunxi platforms

[Marek Vasut]

On 1/3/19 8:53 PM, Jagan Teki wrote:
> On Thu, Jan 3, 2019 at 12:29 PM Lukasz Majewski <lukma at denx.de> wrote:
>>
>> Hi Jagan,
>>
>>> On Wed, Jan 2, 2019 at 4:08 PM Jean-Jacques Hiblot <jjhiblot at ti.com>
>>> wrote:
>>>>
>>>>
>>>> On 29/12/2018 19:49, Jagan Teki wrote:
>>>>> On Mon, Dec 24, 2018 at 3:44 AM Jagan Teki
>>>>> <jagan at amarulasolutions.com> wrote:
>>>>>> On Fri, Dec 21, 2018 at 2:20 PM Jean-Jacques Hiblot
>>>>>> <jjhiblot at ti.com> wrote: Better to have proper commit head that
>>>>>> tells the real issue.
>>>>
>>>> I found it hard to come up with a short description of the real
>>>> issue.
>>>>
>>>> At least this title makes it clear that it is a regression fix, not
>>>> a new feature.
>>>>
>>>> The details of the failures  are in the commit log (or so I thought)
>>>>
>>>>>>
>>>>>>> Fixes commit 013116243950 ("dm: usb: create a new UCLASS ID for
>>>>>>> USB gadget devices")
>>>>>>>
>>>>>>> The UCLASS_DRIVER for id UCLASS_USB_GADGET_GENERIC needs to be
>>>>>>> declared even for platforms that do not enable DM_USB_GADGET.
>>>>>>> Otherwise the driver for their usb peripheral controller fails
>>>>>>> to bind.
>>>>>> Sorry this is unclear, you are trying to skip DM_USB_GADGET code
>>>>>> even though UCLASS_USB_GADGET_GENERIC id used. does it make
>>>>>> sense?
>>>>
>>>> Sorry for the delay. This was indeed a vacation time.
>>>>
>>>> This patch does not skip DM_USB_GADGET. What it does is declare the
>>>> UCLASS_DRIVER for USB peripheral devices even if DM_USB_GADGET is
>>>> not set.
>>>>
>>>> DM_USB_GADGET is a new option and not (yet) widely used and some
>>>> drivers have their own version of the DM support for gadget drivers
>>>> (ie they implement their own version of usb_gadget_initialize(),
>>>> usb_gadget_release() and usb_gadget_handle_interrupts()). However
>>>> all those drivers use the UCLASS_USB_GADGET_GENERIC uclass ID and
>>>> thus the UCLASS_DRIVER for UCLASS_USB_GADGET_GENERIC must be
>>>> declared. In the past they used UCLASS_USB_DEV_GENERIC, but this
>>>> option is intended for the host side.
>>>
>>> Acked-by: Jagan Teki <jagan at openedev.com>
>>>
>>> Marek, any comments?
>>
>> Yes, lets wait for Marek's comment and I will prepare PR (to Marek),
>> which also includes some other fixes.
> 
> Please don't miss this, sunxi need this fix.

Absolutely, I have nothing else to do but to monitor this one single
patch. Thanks for the pressure, it really helps.

-- 
Best regards,
Marek Vasut