On Mon, Nov 25, 2013 at 07:01:54PM +0200, Ивайло Димитров wrote: >> 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. > > AFAIK dsme will not restart it, but power it off, so the above > scenario won't happen. Just assume what happens, when dsme does not start (e.g. system boot hangs). If everything is controlled from userspace, charger would not start (-> safe!). If everything is controlled by the kernel, temperature safety checks are taken (-> safe!). But in the currently proposed variant: No safety checks. -- Sebastian
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