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| author | David Ferguson <ferguson.david@gmail.com> | 2013-11-17 18:55:37 +0400 |
|---|---|---|
| committer | Ricardo Cerqueira <cyanogenmod@cerqueira.org> | 2014-02-11 17:18:26 +0000 |
| commit | ad3d2a2ae7409faa1a885363b6d97bc9cd705e77 (patch) | |
| tree | 44bd5dcec973c656a260ff000e7f82618763cad3 /BoardCommonConfig.mk | |
| parent | c2bbe95d98f2eaf8d4bec28c1423ca53675c70f6 (diff) | |
| download | device_samsung_smdk4412-common-ad3d2a2ae7409faa1a885363b6d97bc9cd705e77.zip device_samsung_smdk4412-common-ad3d2a2ae7409faa1a885363b6d97bc9cd705e77.tar.gz device_samsung_smdk4412-common-ad3d2a2ae7409faa1a885363b6d97bc9cd705e77.tar.bz2 | |
Proper battery paths
* 4.4 introduces a new daemon, healthd, that handles battery status
- resides in: /system/core/healthd
- BatteryMonitor.cpp iterates through all the *directories* under
/sys/class/power_supply looking for a file called 'type'
- if the type == Battery, it assumes this is the location for the
battery stats for the device. Only the first directory that matches
this criteria is used.
- on msm8660/d2/jf/s2 kernels, this search results in:
/sys/class/power_supply/fuelgauge.
- To determine capacity, healthd looks at the contents of the
'capacity' file under this discovered base path. This results
in /sys/class/power_supply/fuelgauge/capacity on msm8660/d2/jf/s2
kernels.
- Unfortunately, this is the wrong path. The capacity file at this
location returns a large negative number.
- Other paths like status, voltage_now, and present are also
incorrectly determined.
* For comparison, in 4.3 battery statistics gathering was handled by
frameworks/base/services/jni/com_android_server_BatteryService.cpp
- BatteryService does a similar search for a file called 'type' with
the contents of 'Battery'
- But the search logic is different here: it takes the *last* path that
matches the criteria.
- This results in the correct /sys/class/power_supply/battery
* This patch overrides the discovery mechanism for battery status completely.
Change-Id: I4579c92bba5596eef4dac67b8c0687be50a1d2f5
Diffstat (limited to 'BoardCommonConfig.mk')
| -rw-r--r-- | BoardCommonConfig.mk | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/BoardCommonConfig.mk b/BoardCommonConfig.mk index d45fe93..1b7ca17 100644 --- a/BoardCommonConfig.mk +++ b/BoardCommonConfig.mk @@ -155,5 +155,8 @@ BOARD_HAS_NO_SELECT_BUTTON := true BOARD_CHARGING_MODE_BOOTING_LPM := /sys/class/power_supply/battery/batt_lp_charging BOARD_BATTERY_DEVICE_NAME := "battery" +# Override healthd HAL +BOARD_HAL_STATIC_LIBRARIES := libhealthd.exynos4 + # inherit from the proprietary version -include vendor/samsung/smdk4412-common/BoardConfigVendor.mk |