On Mon, May 27, 2013 at 9:02 AM, Uwe Kleine-König
<u.kleine-koenig@xxxxxxxxxxxxxx> wrote:
[snip]
> What are you using fiqs for? AFAIK they are not well supported in
> mainline Linux even.
You're well on the way to plumbing the depths of my ignorance. This
is just me applying the RT patches to the raspberrypi linux tree. The
nearest I can figure out an answer to your question is this, in
arch/arm/kernel/fiqasm.S, in __set_fiq_regs:
@@@@@@@@@@@@@@@ hack: enable the fiq here to keep usb driver happy
and r1, #~PSR_F_BIT
@@@@@@@@@@@@@@@ endhack: (need to find better place for this to happen)
It uses the dwc_otg driver, but reports have it that the match of
hardware to driver is not wonderful.
Regards,
Tom
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