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Re: USB power usage during startup (was: CVS commit: src/sys/dev/usb)

To: source-changes%NetBSD.org@localhost
Subject: Re: USB power usage during startup (was: CVS commit: src/sys/dev/usb)
From: Joerg Sonnenberger <joerg%britannica.bec.de@localhost>
Date: Fri, 25 Jan 2008 14:50:10 +0100

On Fri, Jan 25, 2008 at 01:38:30PM +0100, Tobias Nygren wrote:
> USB devices must negotiate with the hub for more power than 0.5W.
> If they draw more, even during startup, they violate the spec.

See also the longer discussion on FreeBSD hackers (?) of this topic,
we don't have to repeat all the details here.

Joerg

References:
- CVS commit: src/sys/dev/usb
  - From: Jared D. McNeill
- USB power usage during startup (was: CVS commit: src/sys/dev/usb)
  - From: Bernd Ernesti
- Re: USB power usage during startup (was: CVS commit: src/sys/dev/usb)
  - From: Tobias Nygren

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