linux-kernel - [PATCH v4 0/5] Add DW PCIe support for Exynos5433 SoCs

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Date:   Fri, 13 Nov 2020 18:01:34 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     linux-samsung-soc@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH v4 0/5] Add DW PCIe support for Exynos5433 SoCs

Dear All,

This patchset is a resurrection of the DW PCIe support for the Exynos5433
SoCs posted long time ago here: https://lkml.org/lkml/2016/12/26/6 and
later here: https://lkml.org/lkml/2017/12/21/296 .

In meantime the support for the Exynos5440 SoCs has been completely
dropped from mainline kernel, as those SoCs never reached the market. The
PCIe driver for Exynos5440 variant however has not been removed yet. This
patchset simply reworks it to support the Exynos5433 variant. The lack of
the need to support both variants significantly simplifies the driver
code.

This patchset is based on the commit b90c53b06597 ("PCI: dwc: Detect
number of iATU windows") available on the following branch:
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git pci-more-dwc-cleanup

Best regards,
Marek Szyprowski


Changelog:

v4:
- fixed topics to better match the common style of the each subsystem
- rebased onto "[PATCH v2 00/16] PCI: dwc: Another round of clean-ups"
- collected tags, dropped merged dts patch

v3: https://lore.kernel.org/linux-samsung-soc/20201029134017.27400-1-m.szyprowski@samsung.com/
- rebased onto "[00/13] PCI: dwc: Another round of clean-ups" patchset:
  https://patchwork.kernel.org/project/linux-samsung-soc/cover/20201028204646.356535-1-robh@kernel.org/
- fixed issues pointed by Rob in the driver logic:
  * removed DBI_RO_WR_EN register poking
  * made driver a standard module
- fixed section mismatch issue
- added "num-viewport = <3>" property to dts and bindings to fix warning

v2: https://lore.kernel.org/linux-samsung-soc/20201023075744.26200-1-m.szyprowski@samsung.com/
- fixed issues in dt-bindings pointed by Krzysztof and Rob

v1: https://lore.kernel.org/linux-samsung-soc/20201019094715.15343-1-m.szyprowski@samsung.com/
- initial version of this resurrected patchset


Patch summary:

Jaehoon Chung (2):
  phy: samsung: phy-exynos-pcie: rework driver to support Exynos5433
    PCIe PHY
  PCI: dwc: exynos: Rework the driver to support Exynos5433 variant

Marek Szyprowski (3):
  dt-bindings: PCI: exynos: drop samsung,exynos5440-pcie binding
  dt-bindings: PCI: exynos: add the samsung,exynos-pcie binding
  dt-bindings: phy: exynos: add the samsung,exynos-pcie-phy binding

 .../bindings/pci/samsung,exynos-pcie.yaml     | 119 ++++++
 .../bindings/pci/samsung,exynos5440-pcie.txt  |  58 ---
 .../bindings/phy/samsung,exynos-pcie-phy.yaml |  51 +++
 drivers/pci/controller/dwc/Kconfig            |  10 +-
 drivers/pci/controller/dwc/pci-exynos.c       | 353 +++++++-----------
 drivers/pci/quirks.c                          |   1 +
 drivers/phy/samsung/phy-exynos-pcie.c         | 304 ++++++---------
 7 files changed, 429 insertions(+), 467 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/samsung,exynos-pcie.yaml
 delete mode 100644 Documentation/devicetree/bindings/pci/samsung,exynos5440-pcie.txt
 create mode 100644 Documentation/devicetree/bindings/phy/samsung,exynos-pcie-phy.yaml

-- 
2.17.1