linux-kernel - [PATCH v0 0/2] PCI: imx6: Enable the vaux regulator when fetch it

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Message-Id: <20250814085920.590101-1-hongxing.zhu@nxp.com>
Date: Thu, 14 Aug 2025 16:59:18 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: frank.li@....com,
	l.stach@...gutronix.de,
	lpieralisi@...nel.org,
	kwilczynski@...nel.org,
	mani@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	bhelgaas@...gle.com,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com
Cc: linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v0 0/2] PCI: imx6: Enable the vaux regulator when fetch it

Refer to PCIe CEM r6.0, sec 2.3 WAKE# Singal, 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, get the vaux and keep it enabled to power up WAKE#
circuit for the entire PCIe controller lifecycle when it's present.

v3 changes:
Add a new vaux power supply used to specify the regulator powered up the
WAKE# circuit on the connector when WAKE# is supported.

v2 changes:
Update the commit message, and add reviewed-by from Frank.
https://patchwork.kernel.org/project/linux-pci/patch/20250619072438.125921-1-hongxing.zhu@nxp.com/

[PATCH v3 1/2] dt-bindings: PCI: fsl,imx6q-pcie: Add vaux for i.MX
[PATCH v3 2/2] PCI: imx6: Enable the vaux regulator when fetch it

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml |  6 ++++++
drivers/pci/controller/dwc/pci-imx6.c                            | 15 +++++++++++++++
2 files changed, 21 insertions(+)