Off-button reaction time

Cristian Paul Peñaranda Rojas paul at kristianpaul.org
Sat Aug 20 09:39:36 EDT 2011


AWESOME !!!

I confirm too it works.


On Sat, Aug 20, 2011 at 01:32:40PM +0400, kyak wrote:
> Wow, wow, wow!
> 
> Just tried it with "/usr/bin/poke 0x10003024 0".
> The reaction to On button is instantanious!!!
> 
> Xiangfu, how about putting this to our start script?
> Bas, this is absolutely awesome, thank you!
> 
> On Wed, 17 Aug 2011, Bas Wijnen wrote:
> 
> >Andrea Bolognani schreef op wo 17-08-2011 om 12:17 [+0200]:
> >>Hold on a second: either I’m utterly mistaken, or the kernel is still far
> >>from being kicked in when the power button is pressed.
> >
> >That is correct. But the delay is made by the rtc, which can be set up
> >when the kernel is running. It will retain its value as long as the rtc
> >has power (that is, when you remove the battery, you lose both the
> >current time and this setting).
> >
> >> I always assumed
> >>the circuitry needed that delay, and it was not avoidable.
> >
> >It is avoidable, and I don't see a reason to use it.
> >
> >>Are you telling me that I’ve been wrong the whole time, and that it is
> >>possible to achieve instant—boot making changes to the software only?
> >
> >Yes. If the kernel sets the rtc register, it will instant-boot from then
> >on, until the power on the rtc goes down (which should never happen).
> >
> >I propose to write the rtc register on every boot, so that even if the
> >battery was removed and the setting was lost, it still only results in
> >the delay once.
> >
> >I'm talking about register HWFCR, page 131 of the programmer's manual.
> >Writing 0 to this register (0x10003024) will remove the delay.
> >
> >Thanks,
> >Bas
> >
> >
> >
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