6.17-stable review patch. If anyone has any objections, please let me know.
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From: Richard Zhu hongxing.zhu@nxp.com
[ Upstream commit c221cbf8dc547eb8489152ac62ef103fede99545 ]
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: Richard Zhu hongxing.zhu@nxp.com [mani: reworded the subject, description and error message] Signed-off-by: Manivannan Sadhasivam mani@kernel.org Reviewed-by: Frank Li Frank.Li@nxp.com Link: https://patch.msgid.link/20250820022328.2143374-1-hongxing.zhu@nxp.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/dwc/pci-imx6.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 80e48746bbaf6..db51e382a7cf3 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -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)