[PATCH v2 1/3] dt-bindings: net: bluetooth: Add broadcom-bluetooth

[Stefan Wahren]

Hi Marcel,

> Marcel Holtmann <marcel at holtmann.org> hat am 23. August 2017 um 16:19 geschrieben:
> 
> 
> Hi Loic,
> 
> >>> Thanks a lot for working on that, I've made a similar attempt a few
> >>> weeks ago but didn't manage to get it to work.
> >>> 
> >>> The way it's hooked in our boards is a bit more complex though, even
> >>> if it could be because we're using a different part.
> >>> 
> >>> In order to get it running we need:
> >>>   - two clocks, called in the broadcom datasheets lpo and tcxo.
> >>>   - three GPIOs, device wakeup, host wakeup and a shutdown GPIO (which
> >>>     might be the BT_ON you were discussing about)
> >>>   - two regulators called vbat and reg-en for us (I guess they're
> >>>     meant to power the chip, and its registers >>
> >>> Do you know if you're also using those? Or could it be that it's just
> >>> hardwired to some non-gatable crystal / regulator on the RPI?
> > 
> > Not on Pi3, but the three gpios and the clock are pretty common for
> > Broadcom bt controller (cf v4 of dt-bindings patch).
> 
> once we get the GPIO expander driver upstream, I think we also need this for RPI 3 and Zero W. Right now we can just not do anything about this.

AFAIK the Zero W doesn't have this GPIO expander. Would it be easier for you?