Chassis sled cycle

[William Kennington]

You don't really want to implement that logic in the power daemon since it
has to find and unbind devices and whatnot. It's quite specific to a
platform and well tailored to be scripted.

On Tue, Mar 31, 2020 at 3:58 PM Vijay Khemka <vijaykhemka at fb.com> wrote:

> William,
>
> I am not worried by that I am just considering that one has to implement
> that unit file as well.
>
> Rather than triggering unit file why can’t we trigger gpio or i2c command
> based on configuration
>
> Provided by each platform.
>
>
>
> Regards
>
> -Vijay
>
>
>
> *From: *William Kennington <wak at google.com>
> *Date: *Tuesday, March 31, 2020 at 1:37 PM
> *To: *Vijay Khemka <vijaykhemka at fb.com>
> *Cc: *Benjamin Fair <benjaminfair at google.com>, "
> jason.m.bills at linux.intel.com" <jason.m.bills at linux.intel.com>, James
> Feist <james.feist at linux.intel.com>, "openbmc at lists.ozlabs.org" <
> openbmc at lists.ozlabs.org>
> *Subject: *Re: Chassis sled cycle
>
>
>
> The target is just that file. Platform specific services add themselves as
> WantedBy. You shouldn't really need to worry about that part as triggering
> the service will cause them to run.
>
>
>
> On Tue, Mar 31, 2020 at 1:33 PM Vijay Khemka <vijaykhemka at fb.com> wrote:
>
>
>
> On 3/31/20, 10:53 AM, "Benjamin Fair" <benjaminfair at google.com> wrote:
>
>     On Mon, 30 Mar 2020 at 13:00, Vijay Khemka <vijaykhemka at fb.com> wrote:
>     >
>     > Hi Jason,
>     >
>     > We have a requirement of Chassis sled cycle and it can be achieved
> by sending an i2c command to hotswap controller. Is there any plan to add
> this feature in x86-power-control. It should take i2c bus address from
> configuration file.
>     >
>     >
>     >
>     > Regards
>     >
>     > -Vijay
>
>     This feature is implemented on some systems using an IPMI OEM command:
>
> https://github.com/openbmc/google-ipmi-sys#delayedhardreset---subcommand-0x03
>
>     It currently just activates the systemd target
>     gbmc-psu-hardreset.target and lets you register services to do the
>     actual hotswap reset (usually by toggling a GPIO). Having a unified
>     solution in x86-power-control for this would be great!
>
> Ben, Can you please share content of
>
> https://github.com/openbmc/google-ipmi-sys/blob/master/gbmc-psu-hardreset.target
> as my assumption is each platform needs to provide this file but I
> couldn't find any platform
> using this. I only found reference in meta-quanta which is deleting this
> file. So please
> provide a reference to this file.
>
>
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