[v5,0/11] Refactoring Microchip PCIe driver and add StarFive PCIe

This patchset final purpose is add PCIe driver for StarFive JH7110 SoC.
JH7110 using PLDA XpressRICH PCIe IP. Microchip PolarFire Using the
same IP and have commit their codes, which are mixed with PLDA
controller codes and Microchip platform codes.

For re-use the PLDA controller codes, I request refactoring microchip
codes, move PLDA common codes to PLDA files.
Desigware and Cadence is good example for refactoring codes.

So first step is extract the PLDA common codes from microchip, and
refactoring the microchip codes.(patch1 - 8)
Then, add Starfive codes. (patch9 - 11)

This patchset is base on v6.5

The patch is base on Daire microchip commit,(accepted, not merge in mainline now)
https://patchwork.kernel.org/project/linux-pci/cover/20230728131401.1615724-1-daire.mcnamara@microchip.com/
patch11 dts patch base on stg clk patchset and syscon patch(these will be merged in 6.6-rcx).
https://patchwork.kernel.org/project/linux-riscv/cover/20230713113902.56519-1-xingyu.wu@starfivetech.com/
https://patchwork.kernel.org/project/linux-riscv/patch/20230717023040.78860-7-xingyu.wu@starfivetech.com/

patch1 is move PLDA XpressRICH PCIe host common properties dt-binding
       docs from microchip,pcie-host.yaml
patch2 is move PolarFire codes to PLDA directory.
patch3 is move PLDA IP register macros to plda-pcie.h
patch4 is rename data structure setup and IRQ functions in microchip codes.
patch5 is move the patch4 functions to common file pcie-plda-host.c
patch6 is Add PLDA event interrupt codes and IRQ domain ops.
patch7 is rename IRQ init function in microchip codes, prepare to move
the common file pcie-plda-host.c,
patch8 is move IRQ init functions and other functions to pcie-plda-host.c
patch9 is add StarFive JH7110 PCIe dt-binding doc.
patch10 is add StarFive JH7110 Soc PCIe codes.
patch11 is Starfive dts config

previous version:
v1:https://patchwork.kernel.org/project/linux-pci/cover/20230719102057.22329-1-minda.chen@starfivetech.com/
v2:https://patchwork.kernel.org/project/linux-pci/cover/20230727103949.26149-1-minda.chen@starfivetech.com/
v3:https://patchwork.kernel.org/project/linux-pci/cover/20230814082016.104181-1-minda.chen@starfivetech.com/
v4:https://patchwork.kernel.org/project/linux-pci/cover/20230825090129.65721-1-minda.chen@starfivetech.com/

change:
  v5:
    patch 6 -8:
    	- Some variables names changed (evt->event).
    	- plda_handle_event() using a unify callback function to get events
num.
	- Add plda_event_ops data structure.
    patch 10:
	plda_event_ops changed which is related to patch 6- 8 changed.

  v4:
    patch 3:
    	Copy the interrupt events macros to pcie-plda-host.c
    patch 7 - 8:
    	get_events() change in patch 7. Patch 8 is just move the codes.
    other change:
	All the functions in commit message add (). 
  v3:
    patch 2- 8:
      - splite refactoring patches to multiple patch.
      - rename plda_pcie to plda_pcie_rp. Maybe other vendor will
        upstream PLDA ep codes.
    patch 9:
      - Remove the redundant reference.
      - move the offset value to codes in starfive,stg-syscon
      - change reset-gpio to prest-gpio.
    patch10:
      - Add 100ms delay after preset for PCIe 6.0 spec.
      - stg-syscon related modification.
    patch11:
      - Add dts configure.
  v2:
    patch1:
      - squash dt-bindings patches to patch1
      - add 'required' list. 
      - plda doc rename to plda,xpressrich-axi-common.yaml
    patch2 - 8:
      - squash the microchip modification patch.
    patch9:
      - remove the plda common required property.
    patch10:
      - Sync the hide rc bar ops with config read function.
      - Revert the T_PVPERL to 100ms and add comments for the source.
      - Replace the link check function by the standard link ops.
      - Convert to new pm ops marcos.
      - Some formats modification.
      - pcie-plda-host modification merge to patch4.
    other:
      - remove the pcie-plda-plat.c
      - remove the starfive dts patch first. for it depends on
        stg clock and syscon setting.

Minda Chen (11):
  dt-bindings: PCI: Add PLDA XpressRICH PCIe host common properties
  PCI: microchip: Move pcie-microchip-host.c to plda directory
  PCI: microchip: Move PLDA IP register macros to pcie-plda.h
  PCI: microchip: Rename data structure and functions
  PCI: plda: Move the common functions to pcie-plda-host.c
  PCI: plda: Add event interrupt codes and IRQ domain ops
  PCI: microchip: Rename IRQ init function
  PCI: microchip: Move IRQ init functions to pcie-plda-host.c
  dt-bindings: PCI: Add StarFive JH7110 PCIe controller
  PCI: starfive: Add JH7110 PCIe controller
  riscv: dts: starfive: add PCIe dts configuration for JH7110

 .../bindings/pci/microchip,pcie-host.yaml     |  55 +-
 .../pci/plda,xpressrich3-axi-common.yaml      |  75 ++
 .../bindings/pci/starfive,jh7110-pcie.yaml    | 120 ++++
 MAINTAINERS                                   |  17 +-
 .../jh7110-starfive-visionfive-2.dtsi         |  64 ++
 arch/riscv/boot/dts/starfive/jh7110.dtsi      |  86 +++
 drivers/pci/controller/Kconfig                |   9 +-
 drivers/pci/controller/Makefile               |   2 +-
 drivers/pci/controller/plda/Kconfig           |  30 +
 drivers/pci/controller/plda/Makefile          |   4 +
 .../{ => plda}/pcie-microchip-host.c          | 605 ++--------------
 drivers/pci/controller/plda/pcie-plda-host.c  | 656 ++++++++++++++++++
 drivers/pci/controller/plda/pcie-plda.h       | 239 +++++++
 drivers/pci/controller/plda/pcie-starfive.c   | 460 ++++++++++++
 14 files changed, 1817 insertions(+), 605 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/plda,xpressrich3-axi-common.yaml
 create mode 100644 Documentation/devicetree/bindings/pci/starfive,jh7110-pcie.yaml
 create mode 100644 drivers/pci/controller/plda/Kconfig
 create mode 100644 drivers/pci/controller/plda/Makefile
 rename drivers/pci/controller/{ => plda}/pcie-microchip-host.c (54%)
 create mode 100644 drivers/pci/controller/plda/pcie-plda-host.c
 create mode 100644 drivers/pci/controller/plda/pcie-plda.h
 create mode 100644 drivers/pci/controller/plda/pcie-starfive.c


base-commit: 2dde18cd1d8fac735875f2e4987f11817cc0bc2c