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author | Chanwoo Choi <cw00.choi@samsung.com> | 2012-05-05 15:24:10 +0200 |
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committer | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-05-06 04:48:50 +0200 |
commit | d829dc75bafb10754f35fb8895e5143d20267b04 (patch) | |
tree | 4cff2aa07dcf7c15ef931e3b9ab20a2d84fcf68d /Documentation | |
parent | smb347-charger: Convert to regmap API (diff) | |
download | linux-d829dc75bafb10754f35fb8895e5143d20267b04.tar.xz linux-d829dc75bafb10754f35fb8895e5143d20267b04.zip |
charger-manager: Poll battery health in normal state
Charger-Manager needs to check battery health in normal state
as well as suspend-to-RAM state. When the battery is fully charged,
Charger-Manager needs to determine when the chargers restart charging.
This patch allows Charger-Manager to monitor battery health in normal
state and handle operation for chargers after battery is fully charged.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/power/charger-manager.txt | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/Documentation/power/charger-manager.txt b/Documentation/power/charger-manager.txt index fdcca991df30..9b3863386e54 100644 --- a/Documentation/power/charger-manager.txt +++ b/Documentation/power/charger-manager.txt @@ -44,6 +44,12 @@ Charger Manager supports the following: Normally, the platform will need to resume and suspend some devices that are used by Charger Manager. +* Support for premature full-battery event handling + If the battery voltage drops by "fullbatt_vchkdrop_uV" after + "fullbatt_vchkdrop_ms" from the full-battery event, the framework + restarts charging. This check is also performed while suspended by + setting wakeup time accordingly and using suspend_again. + 2. Global Charger-Manager Data related with suspend_again ======================================================== In order to setup Charger Manager with suspend-again feature @@ -55,7 +61,7 @@ if there are multiple batteries. If there are multiple batteries, the multiple instances of Charger Manager share the same charger_global_desc and it will manage in-suspend monitoring for all instances of Charger Manager. -The user needs to provide all the two entries properly in order to activate +The user needs to provide all the three entries properly in order to activate in-suspend monitoring: struct charger_global_desc { @@ -74,6 +80,11 @@ bool (*rtc_only_wakeup)(void); same struct. If there is any other wakeup source triggered the wakeup, it should return false. If the "rtc" is the only wakeup reason, it should return true. + +bool assume_timer_stops_in_suspend; + : if true, Charger Manager assumes that + the timer (CM uses jiffies as timer) stops during suspend. Then, CM + assumes that the suspend-duration is same as the alarm length. }; 3. How to setup suspend_again @@ -111,6 +122,16 @@ enum polling_modes polling_mode; CM_POLL_CHARGING_ONLY: poll this battery if and only if the battery is being charged. +unsigned int fullbatt_vchkdrop_ms; +unsigned int fullbatt_vchkdrop_uV; + : If both have non-zero values, Charger Manager will check the + battery voltage drop fullbatt_vchkdrop_ms after the battery is fully + charged. If the voltage drop is over fullbatt_vchkdrop_uV, Charger + Manager will try to recharge the battery by disabling and enabling + chargers. Recharge with voltage drop condition only (without delay + condition) is needed to be implemented with hardware interrupts from + fuel gauges or charger devices/chips. + unsigned int fullbatt_uV; : If specified with a non-zero value, Charger Manager assumes that the battery is full (capacity = 100) if the battery is not being @@ -122,6 +143,8 @@ unsigned int polling_interval_ms; this battery every polling_interval_ms or more frequently. enum data_source battery_present; + : CM_BATTERY_PRESENT: assume that the battery exists. + CM_NO_BATTERY: assume that the battery does not exists. CM_FUEL_GAUGE: get battery presence information from fuel gauge. CM_CHARGER_STAT: get battery presence from chargers. |