linux-kernel - [PATCH v3 0/14] Add iMX PCIe EP mode support

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Message-Id: <1663913220-9523-1-git-send-email-hongxing.zhu@nxp.com>
Date:   Fri, 23 Sep 2022 14:06:46 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     l.stach@...gutronix.de, bhelgaas@...gle.com, robh+dt@...nel.org,
        lorenzo.pieralisi@....com, shawnguo@...nel.org, kishon@...com,
        kw@...ux.com, frank.li@....com
Cc:     hongxing.zhu@....com, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        linux-imx@....com
Subject: [PATCH v3 0/14] Add iMX PCIe EP mode support

i.MX PCIe controller is one dual mode PCIe controller, and can work either
as RC or EP.
This series add the i.MX PCIe EP mode support. And had been verified on
i.MX8MQ EVK, i.MX8MM EVK and i.MX8MP EVK boards.
In the verification, one EVK board used as RC, the other one used as EP.
Use the cross TX/RX differential cable connect the two PCIe ports of these
two EVK boards.

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

Main changes from v2 -> v3:
- Add the i.MX8MP PCIe EP support, and verified on i.MX8MP EVK board.
- Rebase to latest pci/next branch(tag: v6.0-rc1 plus some PCIe changes).

Main changes from v1 -> v2:
- Add Rob's ACK into first two commits.
- Rebase to the tag: pci-v5.20-changes of the pci/next branch.

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml |   3 ++
arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi             |  14 ++++++
arch/arm64/boot/dts/freescale/imx8mm.dtsi                 |  20 +++++++++
arch/arm64/boot/dts/freescale/imx8mp-evk.dts              |  13 ++++++
arch/arm64/boot/dts/freescale/imx8mp.dtsi                 |  19 ++++++++
arch/arm64/boot/dts/freescale/imx8mq-evk.dts              |  12 ++++++
arch/arm64/boot/dts/freescale/imx8mq.dtsi                 |  27 ++++++++++++
drivers/misc/pci_endpoint_test.c                          |   2 +
drivers/pci/controller/dwc/Kconfig                        |  25 ++++++++++-
drivers/pci/controller/dwc/pci-imx6.c                     | 200 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------
10 files changed, 316 insertions(+), 19 deletions(-)

 [PATCH v3 01/14] dt-bindings: imx6q-pcie: Add iMX8MM PCIe EP mode
 [PATCH v3 02/14] dt-bindings: imx6q-pcie: Add iMX8MQ PCIe EP mode
 [PATCH v3 03/14] dt-bindings: imx6q-pcie: Add iMX8MP PCIe EP mode
 [PATCH v3 04/14] PCI: dwc: Kconfig: Add iMX PCIe EP mode support
 [PATCH v3 05/14] arm64: dts: Add iMX8MM PCIe EP support
 [PATCH v3 06/14] arm64: dts: Add iMX8MM PCIe EP support on EVK board
 [PATCH v3 07/14] arm64: dts: Add iMX8MQ PCIe EP support
 [PATCH v3 08/14] arm64: dts: Add iMX8MQ PCIe EP support on EVK board
 [PATCH v3 09/14] arm64: dts: Add iMX8MP PCIe EP support
 [PATCH v3 10/14] arm64: dts: Add iMX8MP PCIe EP support on EVK board
 [PATCH v3 11/14] misc: pci_endpoint_test: Add iMX8 PCIe EP device
 [PATCH v3 12/14] PCI: imx6: Add iMX8MM PCIe EP mode
 [PATCH v3 13/14] PCI: imx6: Add iMX8MQ PCIe EP support
 [PATCH v3 14/14] PCI: imx6: Add iMX8MP PCIe EP support