[Bug 95] verify charger current and battery temperature reading correctness

bugzilla-daemon at bugzilla.openmoko.org bugzilla-daemon at bugzilla.openmoko.org
Sat Mar 31 18:18:25 CEST 2007


http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=95





------- Additional Comments From daniel at totalueberwachung.de  2007-03-31 18:18 -------
The voltage reading seems to be pretty consistent (I only have cheap measuring
hardware), but the output of /sys/bus/i2c/devices/0-0008/chgcur has too much
fluctuation to be correct.
Generally this doesn't seem to represent the charging current in mA.

Here are some values taken over a short period of time (10 sec)
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
533
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
560
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
346
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
746
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
853
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
1093
root at fic-gta01:~$ cat /sys/bus/i2c/devices/0-0008/chgcur 
533

Kernel is uImage-2.6-moko8-r0_0_1584_0-fic-gta01.bin from buildhost
root at fic-gta01:~$ uname -a
Linux fic-gta01 2.6.20.4-moko8 #1 PREEMPT Fri Mar 30 22:10:44 UTC 2007 armv4tl
unknown



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