i.MX ProcessorsのトピックRe: PCIE_CTRL0_WAKE_B level

PCIE_CTRL0_WAKE_B level

mohamed-ali_fod — Fri, 07 Apr 2023 13:54:20 GMT

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

Re: PCIE_CTRL0_WAKE_B level

riteshmpatel — Tue, 18 Apr 2023 04:32:56 GMT

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

Re: PCIE_CTRL0_WAKE_B level

mohamed-ali_fod — Wed, 19 Apr 2023 07:20:32 GMT

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

Re: PCIE_CTRL0_WAKE_B level

gnar_fang — Fri, 21 Apr 2023 09:44:49 GMT

PCIE_CTRL0_WAKE_B as input pin we can't control it.

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

Re: PCIE_CTRL0_WAKE_B level

gnar_fang — Mon, 24 Apr 2023 10:30:18 GMT

@mohamed-ali_fod

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