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power: supply: core: introduce dev_to_psy()

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The psy core and drivers currently use dev_get_drvdata() to go from a
'struct device' to its 'struct power_supply'.
This is not typesafe and or documented.

Introduce a new helper to make this pattern explicit.
Instead of using dev_get_drvdata(), use container_of_const() which
also preserves the constness.
Furthermore 'dev' does need to be dereferenced anymore and at some point
the drvdata could be reused for something else.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241210-power-supply-dev_to_psy-v2-7-9d8c9d24cfe4@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Thomas Weißschuh 2024-12-10 22:55:54 +01:00 committed by Sebastian Reichel
parent bfc330323c
commit f522040363
1 changed files with 2 additions and 0 deletions
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2
include/linux/power_supply.h
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@ -318,6 +318,8 @@ struct power_supply {
#endif
};
#define dev_to_psy(__dev) container_of_const(__dev, struct power_supply, dev)
/*
* This is recommended structure to specify static power supply parameters.
* Generic one, parametrizable for different power supplies. Power supply