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

[Maxime Ripard]

Hi Loic,

On Tue, Aug 22, 2017 at 10:27:43PM +0200, Loic Poulain wrote:
> Hi Maxime,
> 
> > > 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).
> 
> This is already partially supported in the hci_bcm driver.
> Today this driver registers a platform_driver(legacy/ACPI) and a
> serdev_device_driver (new/DT).
> 
> The platform driver retrieves the gpios and mainly uses them in pm ops.
> Once the ACPI for serdev will be supported, this plat driver should be
> removed.
> 
> The serdev driver does no support this yet because I used the RPi3
> as dev platform. But this is something we want to have as well.

I'll give it a shot then. Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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