[PATCH v6 0/2] power: supply: introduce support for the Qualcomm smb2 charger

[Caleb Connolly]

Add a driver for the Qualcomm PMI8998/PM660 Switch-Mode Battery Charger.
This is the second generation SMB charger, and replaces the previous
SMBB hardware found in older PMICs.

This driver provides basic support for initialising the hardware,
configuring the USB input current limit and reporting information about
the state of the charger. Features like type-c dual role support and OTG
switching will be added in future patches.

This patch series depends on my previous series adding support for
the Round Robin ADC which is used for reading the USB voltage and
current, it is currently queued in linux-next, and can be found here:
https://lore.kernel.org/linux-arm-msm/20220429220904.137297-1-caleb.connolly@xxxxxxxxxx/
This has now been merged

Changes since v5:
 * Rework IRQ initialisation to support per-IRQ configuration
 * Add support waking up the device on cable plug/unplug
   * This fixes a bug where when attaching/detaching a cable while
     in suspend, userspace wouldn't reflect the new state.
     Thanks Joel for catching this.

Changes since v4:
 * Fix typo when setting FAST_CHARGE_CURRENT_CFG - the OnePlus 6 now charges
   properly!
 * Limited charge current to 1A until we better understand the thermal
   protection features and how to use them.
 * Address Sebastian's comments (thanks for your patience with this)
 * re-run clang-format

Changes since v3:
 * Drop DTS patches, to be sent in a future series
 * Add POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT so that the charger will
   be exposed as a cooling device,
   see https://lore.kernel.org/linux-pm/164f2458-fb66-f238-7143-bdbe1e200870@xxxxxxxxxx
 * Run clang-format and prevent it from breaking the formatting of the
   defines
 * Apply Sebastian's suggested fixes

Changes since v2:
 * Use devm_delayed_work_autocancel
 * Minor driver fixes
 * Pick up Krzysztof's R-b on the DT patch

Changes since v1:
 * Rename the driver to pmi8998_charger
 * Drop unnecessary (and very broken) mutex
 * Rework the driver based on feedback to v1
 * Fix some minor bugs and improve Automatic Input Current Limit support

Caleb Connolly (2):
  power: supply: add Qualcomm PMI8998 SMB2 Charger driver
  dt-bindings: power: supply: qcom,pmi8998-charger: add bindings for
    smb2 driver

 .../power/supply/qcom,pmi8998-charger.yaml    |   82 ++
 drivers/power/supply/Kconfig                  |   16 +
 drivers/power/supply/Makefile                 |    1 +
 drivers/power/supply/qcom_pmi8998_charger.c   | 1090 +++++++++++++++++
 4 files changed, 1189 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
 create mode 100644 drivers/power/supply/qcom_pmi8998_charger.c

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2.38.0