Openmoko Bug #2310: charging N900 with gta02 causes the gta02 to overheat

[Openmoko Public Trac]

#2310: charging N900 with gta02 causes the gta02 to overheat
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 Reporter:  lindi            |          Owner:  openmoko-kernel     
     Type:  defect           |         Status:  new                 
 Priority:  normal           |      Milestone:                      
Component:  System Software  |        Version:  unspecified         
 Severity:  normal           |       Keywords:  battery pmu charging
 Haspatch:  0                |      Blockedby:                      
Estimated:                   |    Patchreview:                      
 Blocking:                   |   Reproducible:                      
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Comment(by lindi):

 Here's syslog output I recovered from the SD card. Here's what I remember:

 1) I stopped gprs, put phone to hostmode and connected it to nokia
 2) I was watching current_now and got really nervous when it showed values
 around 2000 mA
 3) I disconnected nokia from the phone and was really worried since the
 current_now values seemed to stay high
 4) I did a few suspend/resume cycles but that did not help, current_now
 still showed pretty high values. You can see this if you grep for
 'consumption' from the syslog output:

 Sep 10 19:11:24 ginger logger: resuming (reason EINT09_PMU:button)
 (temperature 31.1) (consumption 19875) (energy 98)
 Sep 10 19:19:49 ginger logger: resuming (reason EINT09_PMU:button)
 (temperature 31.1) (consumption 18000) (energy 97)
 Sep 10 19:38:07 ginger logger: resuming (reason EINT09_PMU:button)
 (temperature 30.8) (consumption 13500) (energy 93)
 Sep 10 19:55:16 ginger logger: resuming (reason EINT09_PMU:button)
 (temperature 55.6) (consumption 1812187) (energy 0)
 Sep 10 19:57:01 ginger logger: resuming (reason EINT09_PMU:button)
 (temperature 58.6) (consumption 1757437) (energy 0)

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Ticket URL: <https://docs.openmoko.org/trac/ticket/2310#comment:3>
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