Commit c221cbf8 authored by Richard Zhu's avatar Richard Zhu Committed by Manivannan Sadhasivam
Browse files

PCI: imx6: Enable the Vaux supply if available 



When the 3.3Vaux supply is present, fetch it at the probe time and keep it
enabled for the entire PCIe controller lifecycle so that the link can enter
L2 state and the devices can signal wakeup using either Beacon or WAKE#
mechanisms.

Signed-off-by: default avatarRichard Zhu <hongxing.zhu@nxp.com>
[mani: reworded the subject, description and error message]
Signed-off-by: default avatarManivannan Sadhasivam <mani@kernel.org>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250820022328.2143374-1-hongxing.zhu@nxp.com
parent 8f5ae30d

drivers/pci/controller/dwc/pci-imx6.c

+4 −0
Original line number Diff line number Diff line
@@ -1745,6 +1745,10 @@ static int imx_pcie_probe(struct platform_device *pdev) 
	pci->max_link_speed = 1;

	of_property_read_u32(node, "fsl,max-link-speed", &pci->max_link_speed);



	ret = devm_regulator_get_enable_optional(&pdev->dev, "vpcie3v3aux");

	if (ret < 0 && ret != -ENODEV)

		return dev_err_probe(dev, ret, "failed to enable Vaux supply\n");



	imx_pcie->vpcie = devm_regulator_get_optional(&pdev->dev, "vpcie");

	if (IS_ERR(imx_pcie->vpcie)) {

		if (PTR_ERR(imx_pcie->vpcie) != -ENODEV)