S805/S812 Device Tree upstreaming (was: Testing.)

Andreas Färber afaerber at suse.de
Mon May 8 04:47:19 PDT 2017


Am 08.05.2017 um 11:42 schrieb Oleg:
>> 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 ?

You need to read the latest bindings documentation, for example:



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