Hello
On Wed, Dec 13, 2023 at 05:28:48PM +0800, Sherry Sun wrote:
> Add wake-gpios property that can be used to wakeup the host
> processor.
>
> Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
> Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
> ---
> Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> index 81bbb8728f0f..fba757d937e1 100644
> --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
> @@ -72,6 +72,12 @@ properties:
> L=operation state) (optional required).
> type: boolean
>
> + wake-gpios:
> + description: If present this property specifies WAKE# sideband signaling
> + to implement wakeup functionality. This is an input GPIO pin for the Root
> + Port mode here. Host drivers will wakeup the host using the IRQ
> + corresponding to the passed GPIO.
> +
From what I know it is possible to share the same WAKE# signal for
multiple root ports. Is this going to work fine with this binding? Same
question on the driver.
We do have design exactly like that, so it's not a theoretical question.
Francesco