On Tue, Mar 30, 2021 at 12:23:35PM -0400, Jim Quinlan wrote:

On Tue, Mar 30, 2021 at 11:30 AM Mark Brown [off-list ref] wrote:

quoted

For a soldered down part I'd expect we'd want both (if the host even
cares) - for anything except a supply that I/O or something else shared
is referenced off there's no great reason why it has to be physically
the same supply going to every device on the bus so each device should
be able to specify separately.

Our developer and reference boards frequently have Mini and half-mini
PCIe sockets (a few exceptions), whereas production boards are mostly
soldered down.

On reflection I think the above probably also applies to sockets - you'd
just have to have a socket visible in the DT.

If I resubmit this pullreq  so that it  looks for "vpcie12v-supply"
and "vpcie3v3-supply" in the host node, will that be acceptable for
both of you?

I think you will need both (assuming the controller actually physically
gets the supplies) - like I say the sockets/devices may not all share
the same 12V and 3.3V rails.