Re: Suspens on Assabet

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);

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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