Tioga Pass OpenBMC 2.8

[Vijay Khemka]

There is BMC_READY gpio which needs to be set by BMC before it can communicate with host, until this gpio is not set Host bios will keep waiting and will not boot completely.

On 9/15/20, 10:19 AM, "Patrick Voelker" <Patrick_Voelker at phoenix.com> wrote:

    The main issue I'm having is understanding the bare minimum requirements for BMC involvement in Tioga Pass power on.  I've found the recipe fb-powerctrl which sets a couple of GPIOs but beyond that I can't figure out how the BMC is enabling power on.  I'm missing something.

    Is this something you can help with?

    > -----Original Message-----
    > From: openbmc [mailto:openbmc-
    > bounces+patrick_voelker=phoenix.com at lists.ozlabs.org] On Behalf Of
    > Patrick Voelker
    > Sent: Monday, September 14, 2020 10:30 AM
    > Subject: RE: Tioga Pass OpenBMC 2.8
    > 
    > What would an application need to do to control power for the host?  Power
    > control while in u-boot _should_ be as simple as enabling the power button
    > passthrough.
    > 
    > > -----Original Message-----
    > > From: Vijay Khemka [mailto:vijaykhemka at fb.com]
    > > Subject: Re: Tioga Pass OpenBMC 2.8
    > >
    > > So if BMC is not running then you can control power manually by power
    > > button or reset button. As far as I know There is no application in uboot
    > > which can control power for host, It is done through BMC when it is booted
    > > to linux and power control is running.
    > >
    > > Please let me know if I am missing anything here.
    > >
    > > Regards
    > > -Vijay