Testing.

[Oleg]

> adding the configuration should be enough - Neil did a good job with
> the actual driver code (it's working fine for me :))
I added to config this variable. This kernel changed the behavior.
Now there is a reaction to change :)

https://yadi.sk/i/rzF14Hx03HqeRh

> I had a quick look at the .dts files - on my Akaso M8S GPIOZ_1 is not
> connected anywhere (at least toggling the GPIO doesn't change anything
> in terms of USB VBUS signal).
> however, your board has: gpio-vbus-power = "GPIOZ_1";
> it's very likely that the GL852 hub is powered off by default and is
> powered on by enabling GPIOZ_1
> but since my .dts is not enabling GPIOZ_1 the hub stays powered off
> and USB is not working for you
> (in other words: this will require additional changes in the .dts to
> make it work)
I found dtb to kernel 3.14 the string

gpio-vbus-power = "GPIOZ_1";

You can simply copy it to the unit or it needs to change according to 
certain rules ?

&usb0 {
     status = "okay";
};