[PATCH v2 00/40] PCI: dwc: Driver clean-ups

Rob Herring
2020-08-21T03:54:30Z

This is a series of clean-ups for the Designware PCI driver. The series
initially reworks the config space accessors to use the existing pci_ops
struct. Then there's removal of 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.
Finally, the initialization for speed/gen, number of lanes, and N_FTS
are all moved to the common DWC code.

This is compile tested only as I don't have any DWC based h/w, so any
testing would be helpful. A branch is here[1].

Rob

[1] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git pci-dw-cleanups

Rob Herring (40):
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: Add a 'num_lanes' field to struct dw_pcie
PCI: dwc: Ensure FAST_LINK_MODE is cleared
PCI: dwc/meson: Drop the duplicate number of lanes setup
PCI: dwc/meson: Drop unnecessary RC config space initialization
PCI: dwc/meson: Rework PCI config and DW port logic register accesses
PCI: dwc/imx6: Use common PCI register definitions
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
PCI: dwc: Remove read_dbi2 code
PCI: dwc: Make ATU accessors private
PCI: dwc: Centralize link gen setting
PCI: dwc: Set PORT_LINK_DLL_LINK_EN in common setup code
PCI: dwc/intel-gw: Drop unnecessary checking of DT 'device_type'
property
PCI: dwc/intel-gw: Move getting PCI_CAP_ID_EXP offset to
intel_pcie_link_setup()
PCI: dwc/intel-gw: Drop unused max_width
PCI: dwc: Move N_FTS setup to common setup
PCI: dwc: Use DBI accessors

drivers/pci/controller/dwc/pci-dra7xx.c | 29 +-
drivers/pci/controller/dwc/pci-exynos.c | 45 +--
drivers/pci/controller/dwc/pci-imx6.c | 52 +--
drivers/pci/controller/dwc/pci-keystone.c | 126 ++-----
drivers/pci/controller/dwc/pci-meson.c | 156 ++-------
drivers/pci/controller/dwc/pcie-al.c | 70 +---
drivers/pci/controller/dwc/pcie-artpec6.c | 48 +--
.../pci/controller/dwc/pcie-designware-ep.c | 11 +-
.../pci/controller/dwc/pcie-designware-host.c | 319 ++++++------------
.../pci/controller/dwc/pcie-designware-plat.c | 4 +-
drivers/pci/controller/dwc/pcie-designware.c | 104 +++---
drivers/pci/controller/dwc/pcie-designware.h | 54 +--
drivers/pci/controller/dwc/pcie-histb.c | 45 +--
drivers/pci/controller/dwc/pcie-intel-gw.c | 65 +---
drivers/pci/controller/dwc/pcie-kirin.c | 43 +--
drivers/pci/controller/dwc/pcie-qcom.c | 33 +-
drivers/pci/controller/dwc/pcie-spear13xx.c | 39 +--
drivers/pci/controller/dwc/pcie-tegra194.c | 120 ++-----
drivers/pci/controller/dwc/pcie-uniphier.c | 3 +-
drivers/pci/probe.c | 14 +-
include/linux/pci.h | 1 +
21 files changed, 443 insertions(+), 938 deletions(-)

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2.25.1