-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said: | Andy Green wrote: |> What we might choose to do in Qi though is override the default 500mA |> USB current limit set by PMU "ROM" to 100mA | | Yup, keeping 500mA enabled for a long time is evil. | |> and then we definitely set |> in stone that we disallow boot without a battery in | | Are you sure about that ? With SDRAM up and running and the CPU | busy-looping at 200MHz, we should still only draw about 70mA | from USB.
My ammeter shows ~120mA average during Linux boot from USB, this is at 400MHz though (with backlight down). This does matter because now we won't enable charging until we get into Linux, if the battery is stone cold dead we really need to be able to get as far as pcf50633 init and USB enumeration so we can come back from the dead on GTA03 (regardless of VB_SYS situation). Anyway it's not Qi issue for today but it is shaping up clearly as kernel issue for "tomorrow", I wonder if it means we should examine Cesar's cpufreq stuff carefully as it can be a big part of the answer. - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkisKZYACgkQOjLpvpq7dMpaIQCfXJTg4U55urvqxtJHKKMaDlHJ 1sAAnj+EGQKpT0OXvbpkIqk7S72Vqr5g =Oiib -----END PGP SIGNATURE-----
