Users of SBE FIFO kernel driver

[Joel Stanley]

Hi Chris,

On Thu, Feb 2, 2017 at 5:58 AM, Christopher Bostic
<cbostic at linux.vnet.ibm.com> wrote:
> I've not seen this discussed in the group but if this has already been
> determined than any pointers to the latest documentation would be
> appreciated.
>
> Who are all the potential users of the OpenBMC SBE FIFO device driver?   I
> understand it will need to export its general submit interface to other
> kernel drivers.  Only one I know of for sure would be the OCC driver Eddie
> James is working on.

In addition to Eddie's driver, in userspace we will have the code that
performs the power on sequence.

> Any others?
>
> What about user space access of the SBE FIFO engine?  What apps would
> require it?  Cronus I assume will need some means to directly access it.

We want userspace API and an in-kernel API.

The driver you design will need to take into account that there will
be multiple users from each of these APIs. For instance, there will be
Eddie's OCC hwmon driver and the userspace code that kicks off the
boot sequence.

Cheers,

Joel