On Thu, Aug 14, 2025 at 04:59:19PM +0800, Richard Zhu wrote: > Refer to PCIe CEM r6.0, sec 2.3 WAKE# Signal, WAKE# signal is only > asserted by the Add-in Card when all its functions are in D3Cold state > and at least one of its functions is enabled for wakeup generation. > > The 3.3V auxiliary power (+3.3Vaux) must be present and used for wakeup > process. Since the main power supply would be gated off to let Add-in > Card to be in D3Cold, add the vaux and keep it enabled to power up WAKE# > circuit for the entire PCIe controller lifecycle when WAKE# is supported. if it is standard, it should move to snps,dw-pcie-common.yaml. Frank > > Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx> > --- > .../devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml > index cddbe21f99f2b..13fddf731ab8c 100644 > --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml > +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml > @@ -98,6 +98,12 @@ properties: > phy-names: > const: pcie-phy > > + vaux-supply: > + description: Should specify the regulator in charge of power source > + of the WAKE# generation on the PCIe connector. When the WAKE# is > + enabled, this regualor would be always on and used to power up > + WAKE# circuit (optional required). > + > vpcie-supply: > description: Should specify the regulator in charge of PCIe port power. > The regulator will be enabled when initializing the PCIe host and > -- > 2.37.1 >
