Re: [PATCH v3 3/8] wifi: ath10k: snoc: support powering on the device via pwrseq

[Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>]

On Thu, Apr 16, 2026 at 12:06:09PM +0200, Luca Weiss wrote:
> Hi Dmitry,
> 
> On Mon Jan 19, 2026 at 6:07 PM CET, Dmitry Baryshkov wrote:
> > The WCN39xx family of WiFi/BT chips incorporates a simple PMU, spreading
> > voltages over internal rails. Implement support for using powersequencer
> > for this family of ATH10k devices in addition to using regulators.
> >
> > Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> > ---
> >  drivers/net/wireless/ath/ath10k/snoc.c | 53 ++++++++++++++++++++++++++++++++--
> >  drivers/net/wireless/ath/ath10k/snoc.h |  3 ++
> >  2 files changed, 53 insertions(+), 3 deletions(-)
> >
> > +	ar_snoc->pwrseq = devm_pwrseq_get(&pdev->dev, "wlan");
> > +	if (IS_ERR(ar_snoc->pwrseq)) {
> > +		ret = PTR_ERR(ar_snoc->pwrseq);
> > +		ar_snoc->pwrseq = NULL;
> > +		if (ret != -EPROBE_DEFER)
> > +			goto err_free_irq;
> 
> I'm fairly sure this is now broken with CONFIG_POWER_SEQUENCING=n since
> then pwrseq_get() is returning ERR_PTR(-ENOSYS) which is not handled
> here.
> 
> I'm observing my ath10k_snoc is now failing to probe "with error -38"
> which definitely seems to be related, but I haven't debugged it further
> yet.

Posted https://patch.msgid.link/20260418-ath10k-snoc-pwrseq-v1-1-832594ba3294@oss.qualcomm.com

-- 
With best wishes
Dmitry