[RFC,00/27] PCI: dwc: Driver clean-ups

Message

Rob Herring (Arm) Aug. 3, 2020, 9 p.m. UTC

This is a series of clean-ups for the Designware PCI driver. The series
primarily reworks the config space accessors to use the existing pci_ops
struct and removes various private data that's also present in the
pci_host_bridge struct. There's also some duplicated common (PCI and
DWC) register defines which I converted to use the common defines.

This is compile tested only as I don't have any DWC based h/w, so any
testing would be helpful. This is an RFC as it will need to be rebased
on 5.9-rc1 and my previous clean-up series.

Rob


Rob Herring (27):
  PCI: Allow root and child buses to have different pci_ops
  PCI: dwc: Use DBI accessors instead of own config accessors
  PCI: dwc: Allow overriding bridge pci_ops
  PCI: dwc: Add a default pci_ops.map_bus for root port
  PCI: dwc: al: Use pci_ops for child config space accessors
  PCI: dwc: keystone: Use pci_ops for config space accessors
  PCI: dwc: tegra: Use pci_ops for root config space accessors
  PCI: dwc: meson: Use pci_ops for root config space accessors
  PCI: dwc: kirin: Use pci_ops for root config space accessors
  PCI: dwc: exynos: Use pci_ops for root config space accessors
  PCI: dwc: histb: Use pci_ops for root config space accessors
  PCI: dwc: Remove dwc specific config accessor ops
  PCI: dwc: Use generic config accessors
  PCI: Also call .add_bus() callback for root bus
  PCI: dwc: keystone: Convert .scan_bus() callback to use add_bus
  PCI: dwc: Convert to use pci_host_probe()
  PCI: dwc: Remove root_bus pointer
  PCI: dwc: Remove storing of PCI resources
  PCI: dwc: Simplify config space handling
  PCI: dwc/keystone: Drop duplicated 'num-viewport'
  PCI: dwc: Check CONFIG_PCI_MSI inside dw_pcie_msi_init()
  PCI: dwc/imx6: Remove duplicate define PCIE_LINK_WIDTH_SPEED_CONTROL
  PCI: dwc/meson: Drop unnecessary RC config space initialization
  PCI: dwc/meson: Rework PCI config and DW port logic register accesses
  PCI: dwc/qcom: Use common PCI register definitions
  PCI: dwc: Remove hardcoded PCI_CAP_ID_EXP offset
  PCI: dwc/tegra: Use common Designware port logic register definitions

 drivers/pci/controller/dwc/pci-dra7xx.c       |   4 +-
 drivers/pci/controller/dwc/pci-exynos.c       |  45 +--
 drivers/pci/controller/dwc/pci-imx6.c         |   6 +-
 drivers/pci/controller/dwc/pci-keystone.c     |  90 +++--
 drivers/pci/controller/dwc/pci-meson.c        | 164 +++------
 drivers/pci/controller/dwc/pcie-al.c          |  70 +---
 drivers/pci/controller/dwc/pcie-artpec6.c     |  11 +-
 .../pci/controller/dwc/pcie-designware-host.c | 319 ++++++------------
 .../pci/controller/dwc/pcie-designware-plat.c |   4 +-
 drivers/pci/controller/dwc/pcie-designware.h  |  28 +-
 drivers/pci/controller/dwc/pcie-histb.c       |  45 +--
 drivers/pci/controller/dwc/pcie-kirin.c       |  43 +--
 drivers/pci/controller/dwc/pcie-qcom.c        |  31 +-
 drivers/pci/controller/dwc/pcie-spear13xx.c   |   4 +-
 drivers/pci/controller/dwc/pcie-tegra194.c    |  90 +++--
 drivers/pci/controller/dwc/pcie-uniphier.c    |   3 +-
 drivers/pci/probe.c                           |  14 +-
 include/linux/pci.h                           |   1 +
 18 files changed, 368 insertions(+), 604 deletions(-)

--
2.25.1