SmbusPpi is defined in PI spec. SmbusLib is defined in Edk2 MdePkg.

Edk2 PEIM can base on SmBusLib. SmBusLib implementation wraps SmBusPpi.

Thanks

Liming

From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of Tiger Liu(BJ-RD)
Sent: Thursday, October 31, 2019 6:51 PM
To: devel@edk2.groups.io; Gao, Liming <liming.gao@intel.com>
Subject: [edk2-devel] [edk2] Smbuslib and SmbusPpi

Hi, Liming:

I have a question about smbus access during pei phase.

I found there was not smbus ppi reference implementation in edk2-platform code base.

And there was a SmbusLib reference implementation lib.

So, PEIMs usually use functions provided by SmbusLib?

Not use PeiSmbusPpi’s interface functions?

Thanks

Best wishes,

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