[PATCH 1/2] I2C: Convert PCF50606 to I2C device

Werner Almesberger werner at openmoko.org
Sat Oct 4 19:47:06 CEST 2008

Andy Green wrote:
> Glamo won't complete any transaction, just stiffs the machine with nWAIT
> down.  It just means --->

... game over :-(

> Sometimes yes, it panics in the resume code when I force nWAIT
> deasserted.  Other times it survives the resume code fine and dies the
> first time framebuffer code tries to flash the cursor.

Ah, that may be different. What I meant was to take a stack trace right
when you force nWAIT, maybe even using an FIQ, so that you find it if
it happens when interrupts are disabled. Assuming that the nWAIT hang
occurs shortly after the operation that causes it in the first place,
that may give a clue as to which operation this was.

Anyway, sounds like a royal pain to debug :-( Maybe it'll help that
you're used to royalty in the UK ;-)

- Werner

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