[PATCH v2 0/2] PCI: dwc: Add multi-port controller support

[Sumit Kumar]

This series adds support for multi-port PCIe controllers in the DesignWare
driver. Currently, the driver only supports a single Root Port with
controller-level properties, which doesn't work for multi-port controllers
where each port may have different configurations.

This series introduces a per-port structure and parsing API that allows 
each Root Port to be configured independently via pcie at N child nodes in
device tree, while maintaining backward compatibility with existing 
single-port bindings.

Signed-off-by: Sumit Kumar <sumit.kumar at oss.qualcomm.com>
---
Changes in v2:
- Fix error code preservation in dw_pcie_resume_noirq() to return actual
  error from dw_pcie_wait_for_link() instead of hardcoded -ETIMEDOUT (Mani).
- Initialize ret variable to -ENOENT in dw_pcie_parse_root_ports() (Mani).
- dw_pcie_host_init(): Remove -ENOENT error skipping to make parsing
  failures fatal for now, add TODO comment about making properties
  optional later (Mani).
- Link to v1: https://lore.kernel.org/r/20260105-dt-parser-v1-0-b11c63cb5e2c@oss.qualcomm.com

---
Sumit Kumar (2):
      PCI: API changes for multi-port controller support
      PCI: dwc: Add multi-port controller support

 drivers/pci/controller/dwc/pci-exynos.c           |   4 +-
 drivers/pci/controller/dwc/pci-imx6.c             |  15 +-
 drivers/pci/controller/dwc/pci-meson.c            |   1 -
 drivers/pci/controller/dwc/pcie-designware-host.c | 175 ++++++++++++++++++----
 drivers/pci/controller/dwc/pcie-designware.c      |  32 ++--
 drivers/pci/controller/dwc/pcie-designware.h      |  17 ++-
 drivers/pci/controller/dwc/pcie-fu740.c           |   6 +-
 drivers/pci/controller/dwc/pcie-intel-gw.c        |  13 +-
 drivers/pci/controller/dwc/pcie-qcom-common.c     |   5 +-
 drivers/pci/controller/dwc/pcie-qcom-ep.c         |   4 +-
 drivers/pci/controller/dwc/pcie-qcom.c            |   4 +-
 drivers/pci/controller/dwc/pcie-rcar-gen4.c       |  13 +-
 drivers/pci/controller/dwc/pcie-spear13xx.c       |   5 +-
 drivers/pci/controller/dwc/pcie-tegra194.c        |   4 +-
 drivers/pci/of.c                                  |   6 +-
 drivers/pci/pci.h                                 |   2 +
 16 files changed, 232 insertions(+), 74 deletions(-)
---
base-commit: 097a6c336d0080725c626fda118ecfec448acd0f
change-id: 20251010-dt-parser-98b50ce18fc1

Best regards,
-- 
Sumit Kumar <sumit.kumar at oss.qualcomm.com>