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[v6,0/2] power: supply: max17042: cleanup and more features

Message ID 20250107-b4-max17042-v6-0-3d0104ad5bc7@gmail.com (mailing list archive)
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Series power: supply: max17042: cleanup and more features | expand

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Dzmitry Sankouski Jan. 7, 2025, 9:31 a.m. UTC 
Fuelgauge blocks often are incorporated in bigger chip,
which may use only 1 line for interrupts. Shared-irq
handles that case by requesting irq as shared.

Maxim PMICs may include fuel gauge with additional features, which is
out of single Linux power supply driver scope.

For example, in max77705 PMIC fuelgauge has additional registers,
like IIN_REG, VSYS_REG, ISYS_REG. Those needed to measure PMIC input
current, system voltage and current respectively. Those measurements
cannot be bound to any of fuelgauge properties.

The solution here add and option to use max17042 driver as a MFD
sub device, thus allowing any additional functionality be implemented as
another sub device. This will help to reduce code duplication in MFD
fuel gauge drivers.

Make max17042 interrupt shared, and add platform driver
version.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
Changes in v6:
- reformat commit messages
- add trailers
- Link to v5: https://lore.kernel.org/r/20241223-b4-max17042-v5-0-e4e409723bce@gmail.com

Changes in v5:
- platform version: use parent device of_node as current device.
  This is because mfd driver matches fuel gauge node, and max17042
  platform variant is intended to match a mfd subdevice.
- fix platform version issues.
- Link to v4: https://lore.kernel.org/r/20241108-b4-max17042-v4-0-87c6d99b3d3d@gmail.com

Changes in v4:
- review fixes.
- Link to v3: https://lore.kernel.org/r/20241118-b4-max17042-v3-0-9bcaeda42a06@gmail.com

Changes in v3:
- pass dev pointer to probe
- Link to v2: https://lore.kernel.org/r/20241108-b4-max17042-v2-0-f058f7a16bab@gmail.com

Changes in v2:
- drop NACKed commits
- make shared interrupts unconditionally
- rework descriptions
- add platform driver version
- Link to v1: https://lore.kernel.org/r/20241109-b4-max17042-v1-0-9e2b07e54e76@gmail.com

---
Dzmitry Sankouski (2):
      power: supply: max17042: make interrupt shared
      power: supply: max17042: add platform driver variant

 drivers/power/supply/max17042_battery.c | 200 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------------------------------------
 1 file changed, 142 insertions(+), 58 deletions(-)
---
base-commit: 7b4b9bf203da94fbeac75ed3116c84aa03e74578
change-id: 20241108-b4-max17042-9306fc75afae

Best regards,