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    Subject[PATCH v3 00/16] bq27x00: New Properties, fixes, bq27000 support
    Date
    This patch series contains a few updates for the bq27x00 driver:
    * Support for additional power supply properties
    * Support for the bq27000 battery which is identical to the bq27200 but is
    connected through the HDQ bus.
    * Adds a register cache to the driver and introduces polling the batteries state
    * Minor improvements and cleanups

    The last patch in this series is not specific to the bq27x00 driver but is
    required for uevents to be generated properly for this driver.
    The patch makes properties which return -ENODATA to be ignored when generating
    uevents. Previously in such a case uevent generation would have been aborted
    with an error. But since the bq27x00 return -ENODATA for the TIME_TO_FULL
    property when the battery is not charging and for the TIME_TO_EMPTY property
    when the battery is not discharging and at least one of them is always true
    uevent generation would always fail.

    This series has so far been tested with the bq27000 and the bq27200 battery,
    but not with the bq27500 battery, so it would be nice if somebody with a board
    containing such a battery could test the patches to make sure that there are no
    regressions.


    Changes since v1:
    Don't cache registers for fast changing properties like VOLTAGE_NOW,
    CURRENT_NOW, ENERGY_NOW and CHARGE_NOW which can be obtained by reading
    only a single register.
    These were ignored anyway when comparing two battery states and since
    their register is not shared between different properties we gain nothing
    by caching them. On the other hand it allows the property to be queried at
    a higher rate then the caching time.


    Changes since v2:
    Two more patches were added to the series:
    One fixes a problem triggered by this series in the power_supply core. It
    is possible that the power_supply core calls back into the driver without
    having its changed_work initialized yet. Which cause an OOPS if the driver
    calls power_supply_changed() at this point.
    The other patch fixes the i2c read function to use a single i2c transfer to
    read a register instead of two transfers. Using two transfers was kind of
    racy and caused wrong results to be returned sometimes.

    I've also reordered the patches slightly and moved the patches touching the
    power_supply core to the beginning of this series to avoid potential problems
    when bisecting through this series.


    This series is also available at
    git://git.metafoo.de/linux-2.6 bq27x00-for-upstream


    This should hopefully be the final version of this patchset. Thanks to all
    who have helped testing and contributed feedback and fixes.

    - Lars

    Grazvydas Ignotas (1):
    bq27x00: Use single i2c_transfer call for property read

    Lars-Peter Clausen (11):
    power_supply: Ignore -ENODATA errors when generating uevents
    power_suply: Initialize changed_work before calling device_add
    bq27x00: Add type property
    bq27x00: Improve temperature property precession
    bq27x00: Return -ENODEV for properties if the battery is not present
    bq27x00: Prepare code for addition of bq27000 platform driver
    bq27x00: Add bq27000 support
    bq27x00: Cache battery registers
    bq27x00: Poll battery state
    bq27x00: Give more specific reports on battery status
    bq27x00: Cleanup bq27x00_i2c_read

    Pali Rohár (4):
    bq27x00: Fix CURRENT_NOW property
    bq27x00: Add new properties
    bq27x00: Add MODULE_DEVICE_TABLE
    bq27x00: Minor cleanups

    drivers/power/Kconfig | 14 +
    drivers/power/bq27x00_battery.c | 725 +++++++++++++++++++++++++--------
    drivers/power/power_supply_core.c | 4 +-
    drivers/power/power_supply_sysfs.c | 2 +-
    include/linux/power/bq27x00_battery.h | 19 +
    5 files changed, 593 insertions(+), 171 deletions(-)
    create mode 100644 include/linux/power/bq27x00_battery.h

    --
    1.7.2.3

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