[PATCH v4 0/7] PCI: MediaTek: Add host controller support for mt2712 and mt7622

[honghui.zhang at mediatek.com]

From: Honghui Zhang <honghui.zhang at mediatek.com>

MediaTek's PCIe host controller has two generation HWs, MT2712 and MT7622
using the new generation HW, which has two root ports. They share most
probing flow with MT2701/MT7623. But the read/write config space logical
is different. The per-port registers must be touched for read/write
configuration space.

This patchset abstract the common probing flow, and add support for the
new generation controller.

Changes since v3:
 - Unify the macro define's names with PCIE_ prefix.
 - Use lower/upper_32_bits macro and remove AHB2PCIE_BASEL/AHB2PCIE_BASEH.
 - Factor out mtk_pcie_find_port to eliminate duplicate code.
 - Use list_for_each_entry instead of list_for_each_entry_safe when search list.
 - Simplify the mtk_pcie_hw_rd_cfg flow.
 - Split a new patch to rename the parameter and function names.
 - Update the subject and changelog to include specific SoC IDs.

Changes since v2:
 - Split the Gen2 training change to a separate patch.
 - Simplify the config_read/write logical and get rid of mtk_pcie_find_port.
 - Using bus->sysdata to simplify the code.
 - Rebase to commit 65b83b13204a ("PCI: mediatek: Explicitly request exclusive
   reset control")[1].
 - Fix some misspells.
 - Add review tags in commit message.

Changes since v1:
 - Fix build warnings in arm arch.
 - Using SoC specific compatible instead of generic compatible.
 - Add devicetree binding example for mt7622.
 - Unified the register define names with PCIE_ prefix.
 - Cleanup some un-necessary condition determine when starup port.
 - minor code cleanups.

[1] https://patchwork.kernel.org/patch/9852591/

Honghui Zhang (2):
  PCI: mediatek: make the parameter and function names more accurate
  PCI: mediatek: Add a structure to abstract the controller generations

Ryder Lee (5):
  PCI: mediatek: Using readl_poll_timeout to wait Gen2 training
  PCI: mediatek: switch to use platform_get_resource_byname()
  dt-bindings: PCI: rename and cleanup MediaTek binding text
  PCI: mediatek: Add controller support for mt2712 and mt7622
  dt-bindings: PCI: add support for mt2712 and mt7622

 .../bindings/pci/mediatek,mt7623-pcie.txt          | 130 -----
 .../devicetree/bindings/pci/mediatek-pcie.txt      | 284 ++++++++++
 drivers/pci/host/Kconfig                           |   5 +-
 drivers/pci/host/pcie-mediatek.c                   | 598 ++++++++++++++++++---
 4 files changed, 820 insertions(+), 197 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt
 create mode 100644 Documentation/devicetree/bindings/pci/mediatek-pcie.txt

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2.6.4