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charset="utf-8" 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. Signed-off-by: Richard Zhu --- .../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.ya= ml 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 =20 + 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 --=20 2.37.1