linux-kernel - [PATCH v1 0/10] Add iMX PCIe EP mode support

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Date:   Tue, 19 Jul 2022 17:45:29 +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 v1 0/10] 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 and i.MX8MM 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     |
+-----------+                +------------+

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml |   2 +
arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi             |  14 +++++++
arch/arm64/boot/dts/freescale/imx8mm.dtsi                 |  20 ++++++++++
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                     | 180 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------
8 files changed, 263 insertions(+), 19 deletions(-)

[PATCH v1 01/10] dt-bindings: imx6q-pcie: Add iMX8MM PCIe EP mode
[PATCH v1 02/10] dt-bindings: imx6q-pcie: Add iMX8MQ PCIe EP mode
[PATCH v1 03/10] PCI: dwc: Kconfig: Add iMX PCIe EP mode support
[PATCH v1 04/10] arm64: dts: Add iMX8MM PCIe EP support
[PATCH v1 05/10] arm64: dts: Add iMX8MQ PCIe EP support
[PATCH v1 06/10] arm64: dts: Add iMX8MM PCIe EP support on EVK board
[PATCH v1 07/10] arm64: dts: Add iMX8MQ PCIe EP support on EVK board
[PATCH v1 08/10] misc: pci_endpoint_test: Add iMX8 PCIe EP device
[PATCH v1 09/10] PCI: imx6: Add iMX8MM PCIe EP mode
[PATCH v1 10/10] PCI: imx6: Add iMX8MQ PCIe EP support