[Balloon] Re: USB master chip

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Author: James
Date:  
To: Nick Bane
CC: balloon
Subject: [Balloon] Re: USB master chip
> I was discussing USB master chips with Steve a while back (trying to avoid
> the ghastly cache shattering 1KHz interrupt-to-do-nothing overhead that the

This isn't much of an issue for me, since I typically have
the USB on for a few minutes every week - but it would be
good to fix. [I've not (fully) read the docs for this chip
- but is it really that bad - philips generally have a
little more clue than that..]

> There are linux drivers (2.4) for both (I think) and the Transdimension
> permitted theirs to be shipped with the GPL sources for the Cerf board.
> However, the Copyright messages in the drivers do not mention GPL so i am
> unclear of the legals.

I'm unclear about non GPL code in the kernel, what are the
implications of this.


> It is my conviction that we should switch to one of these chips asap but
> only if we can get GPL driver support, preferably for 2.6. However, that
> might not be a Guralp friendly thing to do.


I don't care so long as

1) it works as well as the existing chip.
2) i can (still) power up and down the the USB ports
3) it's supported in 2.4, I have a whole bunch of drivers
esp. block drivers, and I don't want to have my
2.4->2.6 migration forced by hardware in both
directions.

J.
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