[PATCH 8/9] add-gta03-pmu-533MHz-init.patch

Andy Green andy at openmoko.com
Tue Aug 19 17:26:48 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:
| Andy Green wrote:
|> Get GTA03 into 533MHz / 133MHz memory bus goodness
| How big a difference does it actually make in terms of boot speed ?
| It would be good if qi could stay within the 100mA envelope, so
| that we can avoid worrying about all the "how do I not kill myself
| while powering up" issues we had to address in u-boot, and leave
| all that mess to the kernel (who has to deal with it anyway).

At the moment there isn't any stuff in the kernel to take care of
changing the cpu speed a la cpufreq except Cesar's implementation on the
debug branch.

So kernel gets stuck with the clock situation that was handed to us by
the bootloader -- the kernel doesn't "deal with" it at all.  All it does
is turn off charging if it sees it has 100mA USB connection, but it
happily will try to turn on more than 500mW can deal with and die.

We need to do more work in kernel to defer stuff like bringing backlight
up (now it never comes up in bootloader) to meet the 500mW startup goal,
so this isn't something to fix today on Qi.

- -Andy
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