usb: dwc2: regression during boot on Raspberry Pi

John Youn John.Youn at
Wed Nov 11 20:39:16 PST 2015

On 11/11/2015 3:20 PM, Stefan Wahren wrote:
> Hi John,
> Am 11.11.2015 um 00:21 schrieb John Youn:
>> On 11/9/2015 12:43 PM, Stefan Wahren wrote:
>>> Hi,
>> The gadget side required it but it looks like the host side
>> didn't.
>> When Marek did the low-level hw refactor, some of the gadget
>> stuff was brought up to the common layer, including the returning
>> of -EPROBE_DEFER when no phys are defined.
>> I think this requirement can be removed. At least only enforce it
>> for the gadget as before.
>> Could you see if the following fixes it?
> the patch looks okay, but it didn't get USB working after applying your 
> patch in combination with my patch.
> devm_phy_get(hsotg->dev, "usb2-phy") failed, but ret has a value of -38. 
> I don't know where this strange value comes from.

Anyone know where the -38 (-ENOSYS) might be coming from for rpi?
I couldn't see anything obvious.

Do you know if any PHY is defined?

> I also experience issues with my rootfs, so i think could be a problem 
> with my build or the linux-next version. Tomorrow i will try the patches 
> on top of Felipe's repo.

Could you also try this patch that I submitted earlier which just
makes the phy optional and leaves the error handling the same?


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