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    Subject[PATCH 1/1] power_supply: wilco_ec: Add permanent long life charging mode
    Date
    This is a long life mode for extended warranty battery, switching
    to a differnt mode selection is unavailable. The power charging rate
    is customized so that battery at work last longer.

    Signed-off-by: Crag Wang <crag_wang@dell.com>
    ---
    Documentation/ABI/testing/sysfs-class-power-wilco | 3 +++
    drivers/power/supply/power_supply_sysfs.c | 1 +
    drivers/power/supply/wilco-charger.c | 5 +++++
    include/linux/power_supply.h | 1 +
    4 files changed, 10 insertions(+)

    diff --git a/Documentation/ABI/testing/sysfs-class-power-wilco b/Documentation/ABI/testing/sysfs-class-power-wilco
    index da1d6ffe5e3c..1c91b17b6fd4 100644
    --- a/Documentation/ABI/testing/sysfs-class-power-wilco
    +++ b/Documentation/ABI/testing/sysfs-class-power-wilco
    @@ -14,6 +14,9 @@ Description:
    Charging begins when level drops below
    charge_control_start_threshold, and ceases when
    level is above charge_control_end_threshold.
    + Permanent Long Life: Last longer battery life, this mode
    + is programmed once in the factory. Switching to a
    + different mode is unavailable.

    What: /sys/class/power_supply/wilco-charger/charge_control_start_threshold
    Date: April 2019
    diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
    index bc79560229b5..af3884015ad8 100644
    --- a/drivers/power/supply/power_supply_sysfs.c
    +++ b/drivers/power/supply/power_supply_sysfs.c
    @@ -87,6 +87,7 @@ static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = {
    [POWER_SUPPLY_CHARGE_TYPE_STANDARD] = "Standard",
    [POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE] = "Adaptive",
    [POWER_SUPPLY_CHARGE_TYPE_CUSTOM] = "Custom",
    + [POWER_SUPPLY_CHARGE_TYPE_LONGLIFE] = "Permanent Long Life",
    };

    static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
    diff --git a/drivers/power/supply/wilco-charger.c b/drivers/power/supply/wilco-charger.c
    index b3c6d7cdd731..713c3018652f 100644
    --- a/drivers/power/supply/wilco-charger.c
    +++ b/drivers/power/supply/wilco-charger.c
    @@ -27,6 +27,7 @@ enum charge_mode {
    CHARGE_MODE_AC = 3, /* Mostly AC use, used for Trickle */
    CHARGE_MODE_AUTO = 4, /* Used for Adaptive */
    CHARGE_MODE_CUSTOM = 5, /* Used for Custom */
    + CHARGE_MODE_LONGLIFE = 6, /* Used for Permanent Long Life */
    };

    #define CHARGE_LOWER_LIMIT_MIN 50
    @@ -48,6 +49,8 @@ static int psp_val_to_charge_mode(int psp_val)
    return CHARGE_MODE_AUTO;
    case POWER_SUPPLY_CHARGE_TYPE_CUSTOM:
    return CHARGE_MODE_CUSTOM;
    + case POWER_SUPPLY_CHARGE_TYPE_LONGLIFE:
    + return CHARGE_MODE_LONGLIFE;
    default:
    return -EINVAL;
    }
    @@ -67,6 +70,8 @@ static int charge_mode_to_psp_val(enum charge_mode mode)
    return POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE;
    case CHARGE_MODE_CUSTOM:
    return POWER_SUPPLY_CHARGE_TYPE_CUSTOM;
    + case CHARGE_MODE_LONGLIFE:
    + return POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
    default:
    return -EINVAL;
    }
    diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
    index ac1345a48ad0..528a3eaa2320 100644
    --- a/include/linux/power_supply.h
    +++ b/include/linux/power_supply.h
    @@ -48,6 +48,7 @@ enum {
    POWER_SUPPLY_CHARGE_TYPE_STANDARD, /* normal speed */
    POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE, /* dynamically adjusted speed */
    POWER_SUPPLY_CHARGE_TYPE_CUSTOM, /* use CHARGE_CONTROL_* props */
    + POWER_SUPPLY_CHARGE_TYPE_LONGLIFE, /* slow speed, longer life */
    };

    enum {
    --
    2.20.1
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