Reported by Nikolaus Schaller, Aug 12, 2013
I had only applied your patches but not yet tested the driver. It appears that it does not work completely on the 3.11 kernel and always reports an empty battery. I get e.g. these readings: root@gta04:~# cat /sys/class/power_supply/twl4030_battery/uevent POWER_SUPPLY_NAME=twl4030_battery POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_STATUS=Charging POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_VOLTAGE_NOW=717000 POWER_SUPPLY_CURRENT_NOW=795000 POWER_SUPPLY_CAPACITY=0 POWER_SUPPLY_CHARGE_FULL=1200000 POWER_SUPPLY_CHARGE_NOW=0 POWER_SUPPLY_TEMP=670 POWER_SUPPLY_TIME_TO_EMPTY_NOW=10800 root@gta04:~# voltage/current/temp appear to be broken. But reading the hwmon directly works perfectly: root@gta04:~# cat /sys/devices/platform/twl4030_madc_hwmon/*_input 481 <- current 0 0 4199 <- vbatt 3 12 12 7 12 14 14 4940 <- vbus 3219 <- vbackup 26 <- temp root@gta04:~# So I think there is something (now) missing with the madc initialization. On the 3.7 kernel it did work.
Comment 1 by Nikolaus Schaller, Aug 12, 2013
Lukas commented in private communication: I would assume something changed in madc_read(). Compare the drivers madc_read with madc_read from drivers/hwmon/twl4030-madc-hwmon.c, there are some slight differences (.func_cb VS .type).
Comment 2 by Lukas M, Aug 18, 2013
madc_read was indeed the culprit. It is now fixed and working again on my 3.11-rc5: root@gta04:~# cat /sys/class/power_supply/bq27000-battery/uevent POWER_SUPPLY_NAME=bq27000-battery POWER_SUPPLY_STATUS=Charging POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_VOLTAGE_NOW=3905000 POWER_SUPPLY_CURRENT_NOW=-136731 POWER_SUPPLY_CAPACITY=45 POWER_SUPPLY_CAPACITY_LEVEL=Normal POWER_SUPPLY_TEMP=271 POWER_SUPPLY_TIME_TO_FULL_NOW=18360 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CHARGE_FULL=844305 POWER_SUPPLY_CHARGE_NOW=378063 POWER_SUPPLY_CHARGE_FULL_DESIGN=1233792 POWER_SUPPLY_CYCLE_COUNT=358 POWER_SUPPLY_ENERGY_NOW=1251220 POWER_SUPPLY_POWER_AVG=0 POWER_SUPPLY_HEALTH=Good root@gta04:~# cat /sys/class/power_supply/twl4030_battery/uevent POWER_SUPPLY_NAME=twl4030_battery POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_STATUS=Charging POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_VOLTAGE_NOW=3900000 POWER_SUPPLY_CURRENT_NOW=720000 POWER_SUPPLY_CAPACITY=25 POWER_SUPPLY_CHARGE_FULL=1200000 POWER_SUPPLY_CHARGE_NOW=324000 POWER_SUPPLY_TEMP=250 POWER_SUPPLY_TIME_TO_EMPTY_NOW=2700 The patch can be pulled from here (and is attached): https://github.com/slyon/linux/tree/gta04-3.11-twl4030_battery
Comment 3 by Lukas M, Aug 18, 2013
Here comes the patch. PS: Attachments are being lost, if Indefero's preview function is being used.
Comment 5 by Nikolaus Schaller, Aug 28, 2013
Appears to work now :)
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