On 08/17/2011 07:02 PM, 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 >
mth has already a working patch for this[1]. We've decided to use a common tree for nanonote and opendingux kernel development, to avoid having patches only in one of the trees. - Lars [1] https://github.com/mthuurne/opendingux-kernel/commit/81a776e43a349a9695f7bc9d51964276934fe099 _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
