[PATCH v4 0/6] Add PCIe support for Qualcomm Nord platform

[Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>]

This series adds PCIe support for the Qualcomm Nord (SA8797P) platform.

Nord has a single Gen5-capable QMP PCIe PHY block split into four
independently-clocked and independently-resettable ports (A/B/C/D).
Firmware selects the active lane topology at boot via a TCSR
configuration register, and the same PHY block can appear as a single
x16 port, x8+x8, x8+x4+x4, or x8+x4+x2+x2 depending on that mode. This
is similar in spirit to the Glymur multi-PHY support already posted,
except Nord's PHY registers are programmed by Linux rather than by
firmware, so this series adds the PLL, TXRXZ, PCS and PCS-lane init
tables along with the power-up/power-down/soft-reset sequencing needed
to bring each port up.

The series also documents and wires up the qcom,nord-pcie compatible
(reusing the existing SA8775P PCIe controller binding), and adds a
CORE_CLK_CGC_DIS/AUX_PWR_DET workaround required to avoid a timing
convergence issue in the PCIe power domain.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
---
To: Vinod Koul <vkoul@kernel.org>
To: Neil Armstrong <neil.armstrong@linaro.org>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
To: Lorenzo Pieralisi <lpieralisi@kernel.org>
To: Krzysztof Wilczyński <kwilczynski@kernel.org>
To: Manivannan Sadhasivam <mani@kernel.org>
To: Bjorn Helgaas <bhelgaas@google.com>
To: Bjorn Andersson <andersson@kernel.org>
To: Maxime Chevallier <maxime.chevallier@bootlin.com>
To: Philipp Zabel <p.zabel@pengutronix.de>
Cc: shengchao.guo@oss.qualcomm.com
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-phy@lists.infradead.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: shengchao.guo@oss.qualcomm.com

---
Changes in v4:
- Couple of nits in dt binding & phy driver (shawn, Mani)
- Add proper description for link-mode & phy-cells
- Remove soc node and address cells from example (Mani)
- change cgc_dis_workaround to disable_cgc (Mani)
- Split common changes and nord changes (Mani) 
- Link to v3: https://patch.msgid.link/20260909-nord-v3-0-b0a82721c547@oss.qualcomm.com

Changes in v3:
- change the name to quadfurcated phy (Konrad).
- remove min items and change clocks order (Krzysztof).
- Factor out the common config and create overlays & try to use common
  symbols for glymur and nord (Konrad).
- create  qphy_setbit and qphy_clrbit (Qiang Yu).
- and in qmp_pcie_exit() apply settings only when nocsr is present (Qiang Yu).
- Link to v2: https://patch.msgid.link/20260828-nord-v2-0-18bf59d19d6f@oss.qualcomm.com

Changes in v2:
- Fix dtbinding errors (Krzysztof)
- Link to v1: https://patch.msgid.link/20260825-nord-v1-0-7c02f2b8765a@oss.qualcomm.com

---
Krishna Chaitanya Chundru (6):
      dt-bindings: phy: qcom: add Nord QMP PCIe PHY binding
      dt-bindings: pci: qcom: add Nord PCIe controller compatible
      PCI: qcom: Add Nord PCIe controller support
      phy: qcom: qmp: Move qphy_setbits/clrbits/checkbits to common header
      phy: qcom: qmp-pcie: Refactor common multiphy handling
      phy: qcom: qmp-pcie: Add Nord Gen5x16 PCIe multi-PHY support

 .../devicetree/bindings/pci/qcom,pcie-sa8775p.yaml |   1 +
 .../phy/qcom,nord-qmp-gen5x16-pcie-phy.yaml        | 267 ++++++
 drivers/pci/controller/dwc/pcie-qcom.c             |  16 +
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c          |  24 -
 drivers/phy/qualcomm/phy-qcom-qmp-common.h         |  32 +
 drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c   |  24 -
 drivers/phy/qualcomm/phy-qcom-qmp-pcie-multiphy.c  | 970 +++++++++++++++++++--
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c           |  32 -
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v6_40.h |  55 ++
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-v6_40.h      |  14 +
 .../qualcomm/phy-qcom-qmp-qserdes-com-pcie-v6_40.h |  94 ++
 .../phy-qcom-qmp-qserdes-txrxz-pcie-v6_40.h        | 194 +++++
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c            |  24 -
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c            |  24 -
 drivers/phy/qualcomm/phy-qcom-qmp-usbc.c           |  24 -
 15 files changed, 1566 insertions(+), 229 deletions(-)
---
base-commit: 5ad078139f684fa1f018fe0134812d4aa17fa53f
change-id: 20260810-nord-461809f1d5ae

Best regards,
--  
Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>


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