power: supply: core: add UAPI to discover currently used extensions

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Userspace wants to now about the used power supply extensions,
for example to handle a device extended by a certain extension
differently or to discover information about the extending device.

Add a sysfs directory to the power supply device.
This directory contains links which are named after the used extension
and point to the device implementing that extension.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241211-power-supply-extensions-v6-4-9d9dc3f3d387@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

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This commit is contained in:

Thomas Weißschuh 2024-12-11 20:57:58 +01:00 • committed by Sebastian Reichel

parent bcfe7d6ba2

commit 288a2cabcf

7 changed files with 47 additions and 4 deletions

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9

Documentation/ABI/testing/sysfs-class-power

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5

drivers/power/supply/cros_charge-control.c

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2

drivers/power/supply/power_supply.h

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19

drivers/power/supply/power_supply_core.c

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10

drivers/power/supply/power_supply_sysfs.c

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4

drivers/power/supply/test_power.c

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2

include/linux/power_supply.h

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