linux-kernel - [PATCH v5 0/3] arm64: qcom: x1e80100-qcp: Add power supply and sideband signals for PCIe RC

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Message-Id: <20250722091151.1423332-1-quic_wenbyao@quicinc.com>
Date: Tue, 22 Jul 2025 17:11:48 +0800
From: Wenbin Yao <quic_wenbyao@...cinc.com>
To: lpieralisi@...nel.org, kwilczynski@...nel.org, mani@...nel.org,
        robh@...nel.org, bhelgaas@...gle.com, sfr@...b.auug.org.au,
        qiang.yu@....qualcomm.com, quic_wenbyao@...cinc.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        andersson@...nel.org, konradybcio@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org
Cc: krishna.chundru@....qualcomm.com, quic_vbadigan@...cinc.com,
        quic_mrana@...cinc.com, quic_cang@...cinc.com
Subject: [PATCH v5 0/3] arm64: qcom: x1e80100-qcp: Add power supply and sideband signals for PCIe RC

The first patch enables the PCI Power Control driver to control the power
state of PCI slots. The second patch adds the bus topology of PCIe domain 3
on x1e80100 platform. The third patch adds perst, wake and clkreq sideband
signals, and describe the regulators powering the rails of the PCI slots in
the devicetree for PCIe3 controller and PHY device.

The patchset has been modified based on comments and suggestions.

Changes in v5:
- Use CONFIG_PCIE_QCOM selecting CONFIG_PCI_PWRCTRL_SLOT.
- Drop vdda-qref-supply for PCIe PHY.
- Link to v4: https://lore.kernel.org/all/20250604080237.494014-1-quic_wenbyao@quicinc.com/

Changes in v4:
- Replace pcie3port with pcie3_port in Patch 2/5.
- Add restoring the vdda-qref request for the 3th PCIe instance by
  reverting commit eb7a22f830f6("phy: qcom: qmp-pcie: drop bogus x1e80100
  qref supply") in Patch 5/5.
- Link to v3: https://lore.kernel.org/all/20250508081514.3227956-1-quic_wenbyao@quicinc.com/

Changes in v3:
- Replace PCI_PWRCTL_SLOT with PCI_PWRCTRL_SLOT in Patch 1/5.
- Keep the order of pinctrl-0 before pinctrl-names in Patch 3/5.
- Add Patch 5/5 to request qref supply for PCIe PHYs.
- Link to v2: https://lore.kernel.org/all/20250425092955.4099677-1-quic_wenbyao@quicinc.com/

Changes in v2:
- Select PCI_PWRCTL_SLOT by ARCH_QCOM in arch/arm64/Kconfig.platforms in
  Patch 1/4.
- Add an empty line before pcie3port node in Patch 2/4.
- Rename regulator-pcie_12v regulator-pcie_3v3_aux and regulator-pcie_3v3
  in Patch 3/4.
- Add Patch 4/4 to describe qref supply of PCIe PHYs.
- Link to v1: https://lore.kernel.org/all/20250320055502.274849-1-quic_wenbyao@quicinc.com/

Qiang Yu (3):
  PCI: dwc: enable PCI Power Control Slot driver for QCOM
  arm64: dts: qcom: x1e80100: add bus topology for PCIe domain 3
  arm64: dts: qcom: x1e80100-qcp: enable pcie3 x8 slot for X1E80100-QCP

 arch/arm64/boot/dts/qcom/x1e80100-qcp.dts | 118 ++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/x1e80100.dtsi    |  11 ++
 drivers/pci/controller/dwc/Kconfig        |   1 +
 3 files changed, 130 insertions(+)


base-commit: 05adbee3ad528100ab0285c15c91100e19e10138
-- 
2.34.1