[PATCH 0/9] Add legacy i.MX PCIe EP mode supports

[Richard Zhu]

Add legacy 32bit i.MX PCIe EP mode support

The PCI controller contained in i.MX6/7 legacy SOCs is one dual mode
PCIe controller, and can work either as RC or EP.

This series add i.MX6/7 PCIe EP mode supports. And had been verified
on i.MX6 sabresd and i.MX7 SDB boards.

In the verification, one board PCIe is used as RC, the other one is used
as EP.
Use the cross TX/RX differential cable connect the two PCIe ports of
these two boards.

+-----------+                +------------+
|   PCIe TX |<-------------->|PCIe RX     |
|           |                |            |
|    Board  |                |    Board   |
|           |                |            |
|   PCIe RX |<-------------->|PCIe TX     |
+-----------+                +------------+

[PATCH 1/9] dt-bindings: PCI: fsl,imx6q: Add i.MX6Q and i.MX6QP PCIe
[PATCH 2/9] dt-bindings: PCI: fsl,imx6q: Add i.MX6SX PCIe EP
[PATCH 3/9] dt-bindings: PCI: fsl,imx6q: Add i.MX7D PCIe EP
[PATCH 4/9] arm: dts: nxp: Add i.MX6QDL and i.MX6QP PCIe EP supports
[PATCH 5/9] arm: dts: nxp: Add i.MX6SX PCIe EP support
[PATCH 6/9] arm: dts: nxp: Add i.MX7D PCIe EP support
[PATCH 7/9] PCI: imx6: Add i.MX6Q and i.MX6QP PCIe EP supports
[PATCH 8/9] PCI: imx6: Add i.MX6SX PCIe EP support
[PATCH 9/9] PCI: imx6: Add i.MX7D PCIe EP support

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml | 50 +++++++++++++++++++++++++++++++++++++++++----
arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi                       | 14 +++++++++++++
arch/arm/boot/dts/nxp/imx/imx6qp.dtsi                        |  4 ++++
arch/arm/boot/dts/nxp/imx/imx6sx.dtsi                        | 17 +++++++++++++++
arch/arm/boot/dts/nxp/imx/imx7d.dtsi                         | 27 ++++++++++++++++++++++++
drivers/pci/controller/dwc/pci-imx6.c                        | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
6 files changed, 200 insertions(+), 5 deletions(-)