linux-kernel - Re: [PATCH v5 1/3] PCI: dwc: enable PCI Power Control Slot driver for QCOM

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Message-ID: <20250722232255.GA2864066@bhelgaas>
Date: Tue, 22 Jul 2025 18:22:55 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Wenbin Yao <quic_wenbyao@...cinc.com>
Cc: lpieralisi@...nel.org, kwilczynski@...nel.org, mani@...nel.org,
	robh@...nel.org, bhelgaas@...gle.com, sfr@...b.auug.org.au,
	qiang.yu@....qualcomm.com, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, andersson@...nel.org,
	konradybcio@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	krishna.chundru@....qualcomm.com, quic_vbadigan@...cinc.com,
	quic_mrana@...cinc.com, quic_cang@...cinc.com
Subject: Re: [PATCH v5 1/3] PCI: dwc: enable PCI Power Control Slot driver
 for QCOM

In subject:

  PCI: qcom: Enable PCI Power Control Slot driver

This is not a generic dwc change; it's specific to qcom, so I want the
subject to reflect that.

We can fix this when applying unless other changes are needed.

On Tue, Jul 22, 2025 at 05:11:49PM +0800, Wenbin Yao wrote:
> From: Qiang Yu <qiang.yu@....qualcomm.com>
> 
> Enable the pwrctrl driver, which is utilized to manage the power supplies
> of the devices connected to the PCI slots. This ensures that the voltage
> rails of the standard PCI slots on some platforms eg. X1E80100-QCP can be
> correctly turned on/off if they are described under PCIe port device tree
> node.
> 
> Signed-off-by: Qiang Yu <qiang.yu@....qualcomm.com>
> Signed-off-by: Wenbin Yao <quic_wenbyao@...cinc.com>
> ---
>  drivers/pci/controller/dwc/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index ff6b6d9e1..deafc512b 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -298,6 +298,7 @@ config PCIE_QCOM
>  	select CRC8
>  	select PCIE_QCOM_COMMON
>  	select PCI_HOST_COMMON
> +	select PCI_PWRCTRL_SLOT
>  	help
>  	  Say Y here to enable PCIe controller support on Qualcomm SoCs. The
>  	  PCIe controller uses the DesignWare core plus Qualcomm-specific
> -- 
> 2.34.1
>