Hi Marcel,
Marcel Holtmann [off-list ref] hat am 23. August 2017 um 16:19 geschrieben:
Hi Loic,
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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?