Better characterization of suspend current

Andy Green andy at
Tue Feb 12 13:50:53 CET 2008

Hash: SHA1

Somebody in the thread at some point said:
>>>>     Yes. The system would be shutdown immediately when the battery
>>>> is about
>>>> 3v3. I think we could add some detecting and handling at u-boot to
>>>> avoid
>>>> booting up when system tends less voltage.
>> A problem here could that if we read -- and clear -- the PMU INT# stuff
>> in U-Boot (to get LOWBAT) the general coldplug actions driven by
>> inheriting the INT# bits will be broken in Linux.  Well with the
>> patchset I sent yesterday we take care of it in early Linux boot anyway
>> and shut down in that condition.
> Currently we measure the voltage from battery directly. If using coulomb
> counter battery, we should get the reading from battery itself.
> Currently battery do not set any parameter yet, so the reading might be
> incorrect.
> But eventually, we should read the parameter directly from the battery
> via HDQ.

It's a good idea Tony.

- -Andy
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