Nobody knows where to start searching for this issue? Am Mittwoch, 16. Mai 2018 20:33:51 UTC+2 schrieb Daniel B: > > Hello, > > i try to port a battery driver to the odroid c2 running android. > I want to make my own device, which is powered from battery and android > should show the remaining soc, temperature and so on. > > I downloaded the kernel source from the hardkernel github repository: > odroidc2-3.14.y-android-m > <https://github.com/hardkernel/linux/tree/odroidc2-3.14.y-android-m> > > For the first test i simply activate the driver "max17042.c" over the > kconfig option. > The values for the first test are simply increment each second within the > working thread of the driver itself. > Later the values are provided over I2C (external µC / battery gauge IC). > > The driver is successfully loaded and it seems, that all work fine. > But then i realized, that the battery soc and temperature stuck on fixed > values. > SOC = 100, Temperature = 42.2C > > Battery voltage, state and so on are changing as expected. > > When i check the "sys/class/power_supply/battery" I get: > adb shell grep '' /sys/class/power_supply/battery/* > /sys/class/power_supply/battery/capacity:77 > grep: /sys/class/power_supply/battery/device: Is a directory > /sys/class/power_supply/battery/health:Overheat > grep: /sys/class/power_supply/battery/power: Is a directory > /sys/class/power_supply/battery/present:0 > /sys/class/power_supply/battery/status:Discharging > grep: /sys/class/power_supply/battery/subsystem: Is a directory > /sys/class/power_supply/battery/technology:Li-poly > /sys/class/power_supply/battery/temp:100 > /sys/class/power_supply/battery/type:Battery > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_NAME=battery > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_STATUS=Discharging > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_HEALTH=Overheat > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_PRESENT=0 > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_TECHNOLOGY=Li-poly > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_VOLTAGE_NOW=5000 > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_TEMP=100 > /sys/class/power_supply/battery/uevent:POWER_SUPPLY_CAPACITY=77 > /sys/class/power_supply/battery/voltage_now:5000 > > SOC and Temperature are changing here, too. > But on android userspace I always get SOC = 100%, temperature = 42,2C and > AC Power supply connected. > > I checked the "BatteryService.java" but i con not see any reason, why soc > and temperature are not reported correctly. > The battery Icon in the statebar is also not shown > > I placed all necessary files to my github repo: > https://github.com/DanieGieb/Odroid-Battery-Gauge > > > Are there any configuration options i could miss? > > Kind Regards > Danie > > >
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