Messages in this thread Patch in this message | | | From | Richard Zhu <> | Subject | [RESEND v4 1/2] dt-bindings: imx6q-pcie: add one regulator used to power up pcie phy | Date | Tue, 30 Mar 2021 16:08:20 +0800 |
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Both 1.8v and 3.3v power supplies can be used by i.MX8MQ PCIe PHY. In default, the PCIE_VPH voltage is suggested to be 1.8v refer to data sheet. When PCIE_VPH is supplied by 3.3v in the HW schematic design, the VREG_BYPASS bits of GPR registers should be cleared from default value 1b'1 to 1b'0. Thus, the internal 3v3 to 1v8 translator would be turned on.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> --- Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt index de4b2baf91e8..d8971ab99274 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt @@ -38,6 +38,9 @@ Optional properties: The regulator will be enabled when initializing the PCIe host and disabled either as part of the init process or when shutting down the host. +- vph-supply: Should specify the regulator in charge of VPH one of the three + PCIe PHY powers. This regulator can be supplied by both 1.8v and 3.3v voltage + supplies. Additional required properties for imx6sx-pcie: - clock names: Must include the following additional entries: -- 2.17.1
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