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Re: USB power usage during startup



Bernd Ernesti wrote:
On Fri, Jan 25, 2008 at 12:29:12AM +0000, Jared D. McNeill wrote:
Module Name:    src
Committed By:   jmcneill
Date:           Fri Jan 25 00:29:12 UTC 2008

Modified Files:
        src/sys/dev/usb: uhub.c

Log Message:
Speed up uhub attachment considerably. Rather than powering up each port
individually then waiting for it to become stable, power them up all
at once and then delay. Don't even bother delaying if we are a root hub,
as this is handled separately in the event thread. From OpenBSD.

Hmm, how much power does this consume if you have more then one usb device
which needs a lot of power during startup?

I'm not sure if I follow -- it should be no different than before. Is it causing issues for you?

Cheers,
Jared



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