Re: pxa2xx_spi suspend/resume

[Daniel Ribeiro <drwyrm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Em Sex, 2009-03-13 às 09:32 -0400, Ned Forrester escreveu:
> Interesting possibility.  I thought suspend/resume was just a low power
> state that awakens by restarting the clocks.  Does the boot loader
> actually run a bit on resume before discovering that memory is already
> loaded?

Linux supports the standby and the sleep PXA modes. The manual says that
on the sleep (suspend/resume) mode all processor state is lost and a new
boot sequence is needed.

I checked my bootloader, when its coming back from resume it executes
less than 30 instructions, and it doesn't touch DRCMR. So i think that
we really need to restore DRCMR on resume.

> Hopefully Dave, or someone else knowledgeable will speak up.  Otherwise,
> go ahead with submitting the patch.  And thanks for tracking this down.

Thank you for mentoring this! :)
I will submit the patch tomorrow morning.

-- 
Daniel Ribeiro


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