Thread (10 messages) 10 messages, 3 authors, 2016-10-25

[RFC] shutdown machine when li-ion battery goes below 3V

From: Pali Rohár <hidden>
Date: 2016-10-24 21:48:57
Also in: linux-omap, lkml

On Monday 24 October 2016 23:41:52 Pavel Machek wrote:
On Mon 2016-10-24 14:29:33, Tony Lindgren wrote:
quoted
Also, the shutdown voltage can depend on external devices
connected. It could be for example 3.3V depending on eMMC on some
devices while devices with no eMMC could have it at 3.0V.
Actually, I'd like to shutdown at 3.3V or more (like 3.5V), because
going below that is pretty mean to the battery. But if I set
threshold too high, GSM activity will push it below that for a very
short while, and I'll shutdown too soon.

Ideas welcome...
bq27x00 has EDVF flag which means that battery is empty. Maemo with 
bq27x00 driver is configured to issue system shutdown when EDVF is set.

Maybe kernel should issue emergency shutdown e.g. after minute or two 
after EDVF flag is set?

-- 
Pali Roh?r
pali.rohar at gmail.com
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