Re: [PATCH 1/2] PCI/pwrctrl: Ensure that the remote endpoint node parent has the supply requirement

[Raj Kumar Bhagat <raj.bhagat@oss.qualcomm.com>]

On 17-02-2026 15:48, Manivannan Sadhasivam via B4 Relay wrote:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
> 
> If OF graph is used in the PCI device node, pwrctrl core currently creates
> the pwrctrl device even if the remote endpoint doesn't have the power
> supply requirements. Since the device doesn't have any power supply
> requirements, there was no pwrctrl driver to probe, leading to PCI
> controller driver probe deferral as it waits for all pwrctrl drivers to
> probe before starting bus scan.
> 
> This issue happens with Qcom ath12k devices with WSI interface attached to
> the Qcom IPQ platforms.
> 
> Fix this issue by checking for the existence of at least one power supply
> property in the remote endpoint parent node. To consolidate all the checks,
> create a new helper pci_pwrctrl_is_required() and move all the checks
> there.
> 
> Fixes: 9db826206f9b ("PCI/pwrctrl: Create pwrctrl device if graph port is found")
> Reported-by: Raj Kumar Bhagat <raj.bhagat@oss.qualcomm.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Verified it on QCOM IPQ9574 RDP433 with ath12k devices with WSI
interface attached.

Tested-by: Raj Kumar Bhagat <raj.bhagat@oss.qualcomm.com>