Andy Green wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Somebody in the thread at some point said: > > | What is correct : > | > | 1/ There is no more power-management chip for hardware reset chip in > | GTA02 ? Why ? > | 2/ The kernel configures the power-management chip at boot, and then > | only, the hardware reboot is working > | > | If 1 is true, does this mean it's not sure we can power off a zombified > | kernel system ( ugly battery removal procedure )? > | If 2 is true, can we move the power-management chip initialization in > | bootloader so it works as soon as possible in boot sequence? > > The "PMU is boss of our boards" for both GTA01 and GTA02. On the > pcf50606 PMU in GTA01 as mwester said it listens out for button held and > takes action itself. > > On pcf50633 on GTA02, whether it will listen for power button hold or > not is determined by which "variant" you bought from NXP. On the one > that is closest to what we would want, it is told to not listen. And > unusually, that behaviour is not changeable over I2C at all, it is > permanently and solely decided by which type you got from NXP. > > It means all we can do is partially synthesize the behaviour in the > driver, which doesn't help if the CPU is crashed. > > There were only a couple of real choices about PMU variant, we made the > best choice all things considered and this behaviour is a small breakage > we have to accept to get the rest of the reasonable matches on other > behaviour -- it isn't the only ding we have to take to balance heaven > and earth with the PMU. > Thank you for your detailed answer, It's really interesting to understand all this P.M design.
Olivier > - -Andy > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (GNU/Linux) > Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org > > iEYEARECAAYFAkj8hOwACgkQOjLpvpq7dMpw7ACcDa+p4fyhl2PamwA6NWlrkVRO > yj4An03hCXvWiEdxoaC6FCONgzvOZCcj > =AFOw > -----END PGP SIGNATURE----- -- Olivier Fauchon Freelance System-Network Admin Phone: +33 610 493 763 http://www.aixmarseille.com _______________________________________________ devel mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/devel
