[PATCH V2 0/4] PCI: imx6: Add pci host wakeup support

[Sherry Sun]

Add pci host wakeup feature for imx platforms. The host wake pin is a
standard feature in the PCIe bus specification, so we can add this
property under PCI dts node to support the host gpio wakeup feature.

Example of configuring the corresponding dts property under the PCI node:
    wake-gpios = <&gpio5 21 GPIO_ACTIVE_LOW>;

---
changes in V2:
1. Rename host-wake-gpio property to wake-gpios.
2. Improve the wake-gpios property description in the dt-binding doc to avoid
confusion.
3. Remove unnecessary debugging info in host_wake_irq_handler().
4. Remove unnecessary imx6_pcie->host_wake_irq = -1 resetting in error paths.
5. Use dev_err_probe() to simplify error path code.
---

Sherry Sun (4):
  PCI: imx6: Add pci host wakeup support on imx platforms.
  dt-bindings: imx6q-pcie: Add wake-gpios property
  arm64: dts: imx8mp-evk: add wake-gpios property for pci bus
  arm64: dts: imx8mq-evk: add wake-gpios property for pci bus

 .../bindings/pci/fsl,imx6q-pcie.yaml          |  6 ++
 arch/arm64/boot/dts/freescale/imx8mp-evk.dts  |  2 +
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts  |  2 +
 drivers/pci/controller/dwc/pci-imx6.c         | 60 +++++++++++++++++++
 4 files changed, 70 insertions(+)

-- 
2.34.1