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From: Richard Zhu <>
	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	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

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 <>
Reviewed-by: Lucas Stach <>
 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
+- 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:

linux-arm-kernel mailing list

  reply	other threads:[~2021-03-30  8:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-30  8:08 [RESEND v4 0/2] add one regulator used to power up pcie phy Richard Zhu
2021-03-30  8:08 ` Richard Zhu [this message]
2021-05-06 16:08   ` [RESEND v4 1/2] dt-bindings: imx6q-pcie: " Lucas Stach
2021-05-06 21:01     ` Bjorn Helgaas
2021-05-14  8:35       ` [EXT] " Richard Zhu
2021-03-30  8:08 ` [RESEND v4 2/2] PCI: imx: clear vreg bypass when pcie vph voltage is 3v3 Richard Zhu
2021-05-06 21:09   ` Bjorn Helgaas
2021-05-14  8:36     ` [EXT] " Richard Zhu

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