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@xxxxxxxxx> --- 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@xxxxxxxxx Changes in v4: - review fixes. - Link to v3: https://lore.kernel.org/r/20241118-b4-max17042-v3-0-9bcaeda42a06@xxxxxxxxx Changes in v3: - pass dev pointer to probe - Link to v2: https://lore.kernel.org/r/20241108-b4-max17042-v2-0-f058f7a16bab@xxxxxxxxx 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@xxxxxxxxx --- 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: 8155b4ef3466f0e289e8fcc9e6e62f3f4dceeac2 change-id: 20241108-b4-max17042-9306fc75afae Best regards, -- Dzmitry Sankouski <dsankouski@xxxxxxxxx>
