Hi Mark, I plan to use AXP221 on A20 based system as I require more switchers than the recommended AXP209 has. Do you see any obstacles which I may be missing now?
Thanks. Dimitar 27 май 2014, вторник, 22:50:26 UTC+3, Mark Brown написа: > > On Tue, May 27, 2014 at 11:38:49AM +0200, Boris BREZILLON wrote: > > > I'm still waiting for inputs regarding the ipsout regulator > representation: > > If you've got questions you need an answer to urgently it's possibly > best to highlight them outside of a series like this doing that helps > make it more obvious. > > > * The ipsout regulator is currently represented as a fixed regulator > > providing a 5v output, and this is not exactly the case. > > AFAIU (here's is the datasheet traduction if you want to check [1]), > the > > ipsout output is a multiplexer that choose among vbus (5V), acin (12V > > which is then converted to 5V) and the battery power supply (3,5 -> > 4,2 V). > > This means the output voltage of ipsout vary between 3,5V and 5V. > > How can we express this kind of muxer in the regulator framework (is > there > > already something available ?) ? > > Note that the power supply selection is automatic, though we could > force > > one power supply, but then we loose the ability to unplug one power > supply > > without impacting the system. > > This sounds like it may as well just be represented as an unregulated > supply - it's just the system root supply really. Nothing can rely on > the voltage anyway as it's going to vary randomly depending on what the > user does power wise and typically it'd only be used as a supply for > things that don't care about the specific voltage. > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
