linux-kernel - [PATCHv1 00/19] Improve SBS battery support

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Date:   Wed, 13 May 2020 20:55:56 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCHv1 00/19] Improve SBS battery support

This patchset improves support for SBS compliant batteries. Due to
the changes, the battery now exposes 32 power supply properties and
(un)plugging it generates a backtrace containing the following message
without the first patch in this series:

---------------------------
WARNING: CPU: 0 PID: 20 at lib/kobject_uevent.c:659 add_uevent_var+0xd4/0x104
add_uevent_var: too many keys
---------------------------

For references this is what an SBS battery status looks like after
the patch series has been applied:

cat /sys/class/power_supply/sbs-0-000b/uevent 
POWER_SUPPLY_NAME=sbs-0-000b
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_HEALTH=Good
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=12
POWER_SUPPLY_VOLTAGE_NOW=11441000
POWER_SUPPLY_CURRENT_NOW=-26000
POWER_SUPPLY_CURRENT_AVG=-24000
POWER_SUPPLY_CAPACITY=76
POWER_SUPPLY_CAPACITY_ERROR_MARGIN=1
POWER_SUPPLY_TEMP=198
POWER_SUPPLY_TIME_TO_EMPTY_AVG=438600
POWER_SUPPLY_TIME_TO_FULL_AVG=3932100
POWER_SUPPLY_SERIAL_NUMBER=0000
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
POWER_SUPPLY_VOLTAGE_MAX_DESIGN=10800000
POWER_SUPPLY_ENERGY_NOW=31090000
POWER_SUPPLY_ENERGY_FULL=42450000
POWER_SUPPLY_ENERGY_FULL_DESIGN=41040000
POWER_SUPPLY_CHARGE_NOW=2924000
POWER_SUPPLY_CHARGE_FULL=3898000
POWER_SUPPLY_CHARGE_FULL_DESIGN=3800000
POWER_SUPPLY_CONSTANT_CHARGE_CURRENT_MAX=3000000
POWER_SUPPLY_CONSTANT_CHARGE_VOLTAGE_MAX=12300000
POWER_SUPPLY_MANUFACTURE_YEAR=2017
POWER_SUPPLY_MANUFACTURE_MONTH=7
POWER_SUPPLY_MANUFACTURE_DAY=3
POWER_SUPPLY_MANUFACTURER=UR18650A
POWER_SUPPLY_MODEL_NAME=GEHC

-- Sebastian

Jean-Francois Dagenais (1):
  power: supply: sbs-battery: add ability to disable charger broadcasts

Sebastian Reichel (18):
  kobject: increase allowed number of uevent variables
  power: supply: core: add capacity error margin property
  power: supply: core: add manufacture date properties
  power: supply: core: add POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED
  power: supply: sbs-battery: Add TI BQ20Z65 support
  power: supply: sbs-battery: add
    POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN support
  power: supply: sbs-battery: simplify read_read_string_data
  power: supply: sbs-battery: add PEC support
  power: supply: sbs-battery: add POWER_SUPPLY_PROP_CURRENT_AVG support
  power: supply: sbs-battery: Improve POWER_SUPPLY_PROP_TECHNOLOGY
    support
  power: supply: sbs-battery: add
    POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT/VOLTAGE_MAX support
  power: supply: sbs-battery: add MANUFACTURE_DATE support
  power: supply: sbs-battery: add
    POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED support
  power: supply: sbs-battery: fix idle battery status
  power: supply: sbs-battery: switch from of_property_* to
    device_property_*
  power: supply: sbs-battery: switch to i2c's probe_new
  power: supply: sbs-battery: constify power-supply property array
  dt-bindings: power: sbs-battery: Convert to yaml

 Documentation/ABI/testing/sysfs-class-power   |  45 ++-
 .../power/supply/sbs,sbs-battery.yaml         |  83 +++++
 .../bindings/power/supply/sbs_sbs-battery.txt |  27 --
 drivers/power/supply/power_supply_sysfs.c     |   5 +
 drivers/power/supply/sbs-battery.c            | 348 +++++++++++++-----
 include/linux/kobject.h                       |   2 +-
 include/linux/power_supply.h                  |   5 +
 7 files changed, 404 insertions(+), 111 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/power/supply/sbs,sbs-battery.yaml
 delete mode 100644 Documentation/devicetree/bindings/power/supply/sbs_sbs-battery.txt

-- 
2.26.2