On Tue, Mar 30, 2021 at 12:23:35PM -0400, Jim Quinlan wrote: > On Tue, Mar 30, 2021 at 11:30 AM Mark Brown <broonie@xxxxxxxxxx> wrote: > > 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.
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