Re: [PATCH] musb: move usb_add_hcd to the core init code from gadget code

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On 07/23/2010 05:53 PM, David Brownell wrote:
Are you sure this doesn't break the hardware
initialization sequencing on some chips?


We tested on our Beagle board C3/C4 board and will test that on Beagle XM board and OMAP4 board. Since I still got a Blackfin BF527 board, I will help to test.

For other silicons, I'm not sure about that.

I distinctly call losing over a month of development
time on this issue, because the hardware has some
undocumented constraints in this area.  The entire
reeason the host init is so "late" is that doing
it earlier (at more logically sensible moments, (in
terms of USB specs vs Mentor silicon) broke things.


Yeah, that's frustrated. I also spent several days here to find a solution to this. I saw the comments in the code about that undocumented constraints. But that maybe depends on different silicon.

Thanks, Dave.
-Bryan

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