linux-kernel - Re: [PATCH v2 2/3] bq2415x_charger: Use power

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Message-ID: <1851041258.29554.1385398914287.JavaMail.apache@mail83.abv.bg>
Date:	Mon, 25 Nov 2013 19:01:54 +0200 (EET)
From:	Ивайло Димитров 
	<freemangordon@....bg>
To:	Pavel Machek <pavel@....cz>
Cc:	pali.rohar@...il.com, sre@...g0.de, anton@...msg.org,
	dwmw2@...radead.org, tony@...mide.com, linux@....linux.org.uk,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	aaro.koskinen@....fi
Subject: Re: [PATCH v2 2/3] bq2415x_charger: Use power_supply notifier for automode

 




 >-------- Оригинално писмо --------
 >От:  Pavel Machek 
 >Относно: Re: [PATCH v2 2/3] bq2415x_charger: Use power_supply notifier for
 automode
 >До: Pali Rohár 
 >Изпратено на: Понеделник, 2013, Ноември 25 17:18:39 EET
 >
 >
 >On Mon 2013-11-25 15:10:00, Pali Rohár wrote:
 >> On Monday 25 November 2013 15:01:27 Pavel Machek wrote:
 >> > Where can I get dsme sources?
 >> > 									Pavel
 >> 
 >> dsme daemon: https://gitorious.org/community-ssu/dsme
 >> dsme thermal plugin: https://gitorious.org/rx51-bme-replacement/dsme-thermalobject-surface
 >> 
 >> dsme thermal plugin is responsible for checking temperature of 
 >> battery and send it to dsme damon. dsme daemon itself checking 
 >> temperature limits and do something (e.g reboot device)
 >
 >Thanks for links!
 >
 >AFAICT.... dsme daemon does some kind of system management, not
 >directly controlling charging, right? It does monitor system temperature.
 >
 >Now.. Imagine phone left in car in charger (on sun). Likely
 >temperature will reach high values, kernel is charging, dsme will
 >reboot the system, but kernel will start charging again, dsme will
 >reboot again, ...
 >
 >And it is not only high temperatures that are problem for li-ion
 >charging; battery should not be fast charged below 5C and should not
 >be charged below 0C. (Again, both are likely to happen if you leave
 >your phone in car).
 >
 >AFAICT, we should simply disable charging below 5C or above 45C.
 >
 >									Pavel
 >-- 
 >(english) http://www.livejournal.com/~pavelmachek
 >(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
 >

AFAIK dsme will not restart it, but power it off, so the above scenario won't happen.

Regards,
Ivo
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