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PCI: rcar-gen4: Add R-Car V4H support

From:  Yoshihiro Shimoda <yoshihiro.shimoda.uh-AT-renesas.com>
To:  lpieralisi-AT-kernel.org, kw-AT-linux.com, robh-AT-kernel.org, bhelgaas-AT-google.com, krzysztof.kozlowski+dt-AT-linaro.org, conor+dt-AT-kernel.org, jingoohan1-AT-gmail.com, mani-AT-kernel.org
Subject:  [PATCH v6 0/7] PCI: rcar-gen4: Add R-Car V4H support
Date:  Wed, 10 Apr 2024 09:48:25 +0900
Message-ID:  <20240410004832.3726922-1-yoshihiro.shimoda.uh@renesas.com>
Cc:  marek.vasut+renesas-AT-gmail.com, linux-pci-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-renesas-soc-AT-vger.kernel.org, Yoshihiro Shimoda <yoshihiro.shimoda.uh-AT-renesas.com>
Archive-link:  Article

The pcie-rcar-gen4 driver can reuse other R-Car Gen4 support like
r8a779g0 (R-Car V4H) and r8a779h0 (R-Car V4M). However, some
initializing settings differ between R-Car S4-8 (r8a779f0) and
others. The R-Car S4-8 will be minority about the setting way. So,
R-Car V4H will be majority and this is generic initialization way
as "renesas,rcar-gen4-pcie{-ep}" compatible. For now, I tested
both R-Car S4-8 and R-Car V4H on this driver. I'll support one more
other SoC (R-Car V4M) in the future.

Changes from v5:
https://lore.kernel.org/linux-pci/20240408012458.3717977-...
- Drop "dwc: " prefixes from the subjects in patch [0456]/7.

Changes from v4:
https://lore.kernel.org/linux-pci/20240403053304.3695096-...
- Fix compatible string for renesas,r8a779f0-pcie-ep which was described
  accidentally from v3...

Changes from v3:
https://lore.kernel.org/linux-pci/20240401023942.134704-1...
- Modify the code to use "do .. while" instead of goto in patch 6/7.

Changes from v2:
https://lore.kernel.org/linux-pci/20240326024540.2336155-...
- Add a new patch which just add a platdata in patch 4/7.
- Modify the subjects in patch [56]/7.
- Modify the description and code about Bjorn's comment in patch [56]/7.
- Add missing MODULE_FIRMWARE(9 in patch 6/7.
- Document a policy aboud adding pci_device_id instead of adding r8a779g0's id
  in patch 7/7.

Changes from v1:
https://lore.kernel.org/linux-pci/20240229120719.2553638-...
- Based on v6.9-rc1.
- Add Acked-by and/or Reviewed-by in patch [126/6].

Yoshihiro Shimoda (7):
  dt-bindings: PCI: rcar-gen4-pci-host: Add R-Car V4H compatible
  dt-bindings: PCI: rcar-gen4-pci-ep: Add R-Car V4H compatible
  PCI: dwc: Add PCIE_PORT_{FORCE,LANE_SKEW} macros
  PCI: rcar-gen4: Add rcar_gen4_pcie_platdata
  PCI: rcar-gen4: Add .ltssm_enable() for other SoC support
  PCI: rcar-gen4: Add support for r8a779g0
  misc: pci_endpoint_test: Document a policy about adding pci_device_id

 .../bindings/pci/rcar-gen4-pci-ep.yaml        |   4 +-
 .../bindings/pci/rcar-gen4-pci-host.yaml      |   4 +-
 drivers/misc/pci_endpoint_test.c              |   1 +
 drivers/pci/controller/dwc/pcie-designware.h  |   6 +
 drivers/pci/controller/dwc/pcie-rcar-gen4.c   | 272 +++++++++++++++++-
 5 files changed, 270 insertions(+), 17 deletions(-)

-- 
2.25.1




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