PCIE_CTRL0_WAKE_B level

[mohamed-ali_fod]

Hello,

I have the same issue as https://community.nxp.com/t5/i-MX-Processors/i-MX8-QuadXPlus-GPIO-configuration/td-p/1404411

Could you provide details why the PCIE_CTRL0_WAKE_B is always high on i.MX8 QuadXPlus MEK, I checked that there is a pull up resistor, can this signal be low?

Could you please also let me know how to enable wakeup on that PCIE pin coming from wifi module? I am using linux-imx-6.1

Best regards,

Mohamed Ali

[mohamed-ali_fod]

Hi @riteshmpatel,

Thank you but in evk it seems that the wifi module doesn't use PCIE_CTRL0_WAKE_B for wakeup? Shall I configure PCIE_CTRL0_WAKE_B from SCFW as wakeup event coming from PCIe wifi module? Where I can find an example code?

Best regards,

Mohamed Ali

[gnar_fang]

PCIE_CTRL0_WAKE_B as input pin we can't control it.

some details I will check it and reply to you later.

[gnar_fang]

@mohamed-ali_fod  

Do you mean to use the wifi to wake up the Host system?

[riteshmpatel]

Hi @mohamed-ali_fod,

I hope you are doing well.
Please accept my apologies for the delay in response.

PCIE_CTRL0_WAKE_B because it's input Pin. PCIE EP pulls it down.
One can refer to wifi_wake_host in imx8mp-evk.dts

Thanks & Regards,
Ritesh M Patel