Weekly Engineering News 36/2008

[Andy Green]

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Somebody in the thread at some point said:

|> Staying with Samsung allows us to reuse more of our current Linux
|> driver work, for example the PMU (NXP 50633) can stay the same.
|
| Having read
| http://lists.openmoko.org/pipermail/hardware/2008-August/000378.html
| and
| http://lists.openmoko.org/pipermail/hardware/2008-August/000384.html
| makes me think that keeping the 50633 around just to re-use code may not
| be the best of ideas, especially if a smart PMU can also fulfill simple
| tasks that otherwise would require the SoC to wake up.

Well it's the devil we know pretty well now, even though it isn't
completely tamed.  Stuff like rail bringup and which ones are on and
what voltage we can workaround by careful matching.

Driver is an issue, but we also know what electrical and reliability
performance to expect with pcf50633 now we shipped a ton of them.  If
VB_SYS is helped out with a big cap and we take steps about battery
discharge level we see great reliability of power hardware on GTA02,
having that again should be fine.

- -Andy
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