Re: [PATCH] power: sequencing: qcom-wcn: don't request BT enable GPIOs for wcn7850

[Bartosz Golaszewski]

On Tue, Jul 2, 2024 at 1:42 PM Dmitry Baryshkov
<dmitry.baryshkov@xxxxxxxxxx> wrote:
>
> On Tue, 2 Jul 2024 at 14:41, Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> >
> > From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> >
> > Due to having many existing users of wcn7850 in the kernel, conversion
> > of the hci_qca driver to using pwrseq exclusively must be done
> > carefully. Right now, the Bluetooth driver requests and controls the BT
> > enable GPIO and so the PMU pwrseq driver must not do it or we will run
> > into problems depending on the probe ordering.
> >
> > Add a flag that tells the driver not to request the BT-enable GPIO. We
> > will remove it once the conversion of the Bluetooth driver is complete.
>
> This will not prevent the pinctrl conflict if both PMU and BT devices
> declare pinctrl for the BT_EN pin.
>

Hmm... So maybe we'll need to modify the BT driver after all. Should
we see if we have the enable-gpios property in hci_qca and - if not -
try to use the power sequencer? Or prioritize the sequencer first and
if it doesn't match, then fall-back to the current mode of operation?

Bart