v1: introduced feature as a framework within power supply class driver with separate files for battid framework and charging framework v2: fixed review comments, moved macros and inline functions to power_supply.h v3: moved the feature as a separate driver, combined battid framework and charging framework inside the power supply charging driver. Moved charger specific properties to power_supply_charger.h and plugged the driver with power supply subsystem using power_supply_notifier introduced in my previous patch. Also a sample charger chip driver (bq24261) patch added to give more idea on the psy charging driver usage The Power Supply charging driver connects multiple subsystems to do charging in a generic way. The subsystems involves power_supply, thermal and battery communication subsystems (1wire). With this the charging is handled in a generic way. The driver makes use of different new features - Battery Identification interfaces, pluggable charging algorithms, charger cable arbitrations etc. At present the charging is done based on the static battery characteristics. This is done at the boot time by passing the battery properties (max_voltage, capacity) etc. as a platform data to the charger/battery driver. But new generation high volt batteries needs to be identified dynamically to do charging in a safe manner. The batteries are coming with different communication protocols (BSI/SDQ/MIPI BIF). It become necessary to communicate with battery and identify it's charging profiles before setup charging. Also the charging algorithms can vary based on the battery characteristics and the platform characteristics. To handle charging in a generic way it's necessary to support pluggable charging algorithms. Power Supply Charging driver selects algorithms based on the type of battery charging profile. This is a simple binding and can be improved later. This may be improved to select the algorithms based on the platform requirements. Also we can extend this driver to plug algorithms from the user space. The driver also introduces the charger cable arbitration. A charger may supports multiple cables, but it may not be able to charge with multiple cables at a time (USB/AC/Wireless etc). The arbitration logic inside the driver selects the cable based on it's capabilities and the maximum charge current the platform can support. Also the driver arbitrates between different charger chip drivers based on their priority. Also the driver exposes features to control charging on different platform states. One such feature is thermal. The driver handles the thermal throttling requests for charging and control charging based on the thermal subsystem requirements. The patch also introduces generic interface for charger cable notifications. Charger cable events and capabilities can be notified using the generic power_supply_notifier chain. Overall this driver removes the charging logic out of the charger chip driver and the charger chip driver can just listen to the request from the power supply charging driver to set the charger properties. This can be implemented by exposing get_property and set property callbacks. Jenny TC (4): power_supply: Add inlmt,iterm, min/max temp props power_supply: Introduce Generic Power Supply charging driver power_supply: Introduce PSE compliant algorithm power_supply: bq24261 charger driver Documentation/power/power_supply_charger.txt | 332 ++++++ Documentation/power/power_supply_class.txt | 6 + drivers/power/Kconfig | 30 + drivers/power/Makefile | 3 + drivers/power/bq24261_charger.c | 1447 ++++++++++++++++++++++++++ drivers/power/charging_algo_pse.c | 198 ++++ drivers/power/power_supply_charger.c | 1191 +++++++++++++++++++++ drivers/power/power_supply_charger.h | 218 ++++ drivers/power/power_supply_core.c | 3 + drivers/power/power_supply_sysfs.c | 4 + include/linux/power/bq24261_charger.h | 33 + include/linux/power/power_supply_charger.h | 234 +++++ include/linux/power_supply.h | 162 +++ 13 files changed, 3861 insertions(+) create mode 100644 Documentation/power/power_supply_charger.txt create mode 100644 drivers/power/bq24261_charger.c create mode 100644 drivers/power/charging_algo_pse.c create mode 100644 drivers/power/power_supply_charger.c create mode 100644 drivers/power/power_supply_charger.h create mode 100644 include/linux/power/bq24261_charger.h create mode 100644 include/linux/power/power_supply_charger.h -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
