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power_supply: Add driver private data

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Allow drivers to store private data inside power_supply structure for
later usage in power supply operations.

Usage of driver private data is necessary to access driver's state
container object from power supply calls (like get_property()) if struct
'power_supply' is a stored there as a pointer, for example:

struct some_driver_info {
	struct i2c_client       *client;
	struct power_supply     *power_supply;
	...
}

In such case one cannot use container_of() and must store pointer to
state container as private data.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Bartlomiej Zolnierkiewicz <[email protected]>
Reviewed-by: Sebastian Reichel <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
This commit is contained in:
Krzysztof Kozlowski 2015-03-12 08:44:01 +01:00 • committed by Sebastian Reichel
commit e44ea36439
2 changed files with 10 additions and 0 deletions
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6
drivers/power/power_supply_core.c
View file

@ -674,6 +674,12 @@ void power_supply_unregister(struct power_supply *psy)
}
EXPORT_SYMBOL_GPL(power_supply_unregister);
void *power_supply_get_drvdata(struct power_supply *psy)
{
return psy->drv_data;
}
EXPORT_SYMBOL_GPL(power_supply_get_drvdata);
static int __init power_supply_class_init(void)
{
power_supply_class = class_create(THIS_MODULE, "power_supply");