Re: Suspens on Assabet

On Mon, Apr 22, 2002 at 07:21:12PM +0200, Eric Benard / FREE wrote:
> Russell King - ARM Linux wrote:
> >On Mon, Apr 22, 2002 at 12:57:47PM +0200, Eric Benard / FREE wrote:
> >
> >>OK, I'm going to check this afternoon.
> >
> >
> >Last I remember, a few bits in the BCR weren't correct to the manual.
> >The GPIO states while suspended are probably a little questionable as
> >well.
> >
> ok, here is what I did to progress (not clean hack, just to look where 
> the power leakage could come from):
> 
> assabet.c : GPIO used by peripherals set as input when powering down 
> (PSDR), 3.68MHz quartz off when powerdown (PCFR_OPDE)
>       PWER = PWER_GPIO0;
>       PGSR = 0;
>       PCFR = PCFR_OPDE;
>       PSDR = 0xFFFFFFFF;
> 
> 
> pm.c : set GPIO to a value (looking for the optimal value maybe , any 
> idea ? :)
>       in pm_do_suspend() after leds_event(led_stop);
> 
>       GPDR = 0x006000;
>       GPCR = 0x006000;
> 
>       ASSABET_BCR_set(0xA06490);
>       ASSABET_BCR_clear(0x5F9B6F);

Hmm, maybe you should add a PM callback in assabet.c instead of directly
hacking pm.c?

That way we could also fix the UCB reset problem (see patch 1100/1).


> 
> The BCR/GPxR hack brings suspend current from 100mA@5V down to 50 mA@5V
> The PCFR/PSDR hack brings suspend current from 50 mA@5V down to 30 mA@5V
> 
> I'll go on investigating tomorrow.
> 
> Eric
> 
> 
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