On Tuesday 26 January 2010, Felipe Balbi wrote:>
>Thing is, supplying current is a bit more involved. If the
>board can't supply 300 mA, the USB configuration selection
>mechanism has to know that, so it never selects peripheral
>configurations which require that much current.
but that's done already by the usb core, no ? It rules out configuration
based on the hub->power_budget (can't remember if the field is that
Yes, it handles that ... but where does the power budget
come from? That's what I meant by "more involved".
As in, the host/supplying side of the power equation can't
be event driven like the peripheral/consuming side can.
And that's another reason I think it's best to fully solve
the common (peripheral, recharge-that-batter) case first.