Re: [RFT PATCH] Revert "power: sequencing: request the WLAN enable GPIO as-is"

From: Stephan Gerhold
Date: Fri Dec 13 2024 - 13:19:49 EST


On Tue, Dec 03, 2024 at 03:12:51PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
>
> This reverts commit a9aaf1ff88a8cb99a1335c9eb76de637f0cf8c10.
>
> With the changes recently merged into the PCI/pwrctrl/ we now have
> correct ordering between the pwrseq provider and the PCI-pwrctrl
> consumers. With that, the pwrseq WCN driver no longer needs to leave the
> GPIO state as-is and we can remove the workaround.
>

Should probably revert commit d8b762070c3f ("power: sequencing:
qcom-wcn: set the wlan-enable GPIO to output") as well?

> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> ---
> drivers/power/sequencing/pwrseq-qcom-wcn.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/power/sequencing/pwrseq-qcom-wcn.c b/drivers/power/sequencing/pwrseq-qcom-wcn.c
> index 682a9beac69eb..bb8c47280b7bc 100644
> --- a/drivers/power/sequencing/pwrseq-qcom-wcn.c
> +++ b/drivers/power/sequencing/pwrseq-qcom-wcn.c
> @@ -379,7 +379,7 @@ static int pwrseq_qcom_wcn_probe(struct platform_device *pdev)
> "Failed to get the Bluetooth enable GPIO\n");
>
> ctx->wlan_gpio = devm_gpiod_get_optional(dev, "wlan-enable",
> - GPIOD_ASIS);
> + GPIOD_OUT_LOW);
> if (IS_ERR(ctx->wlan_gpio))
> return dev_err_probe(dev, PTR_ERR(ctx->wlan_gpio),
> "Failed to get the WLAN enable GPIO\n");
> --
> 2.30.2
>

I'm not sure why but applying this patch brings back the error I had
before. It does seem like setting wlan-enable GPIO happens early enough,
but maybe some timing is still wrong.

[ 17.132161] <gpiod_set_value_cansleep(ctx->wlan_gpio, 1);>
[ 17.480619] ath12k_pci 0004:01:00.0: of_irq_parse_pci: failed with rc=134
[ 17.491997] ath12k_pci 0004:01:00.0: pci device id mismatch: 0xffff 0x1107
[ 17.492000] ath12k_pci 0004:01:00.0: failed to claim device: -5
[ 17.492075] ath12k_pci 0004:01:00.0: probe with driver ath12k_pci failed with error -5

Any ideas/suggestions?

Thanks,
Stephan