power_supply: Add driver private data
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 <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Sebastian Reichel <sre@kernel.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Sebastian Reichel <sre@kernel.org>
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@ -674,6 +674,12 @@ void power_supply_unregister(struct power_supply *psy)
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}
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EXPORT_SYMBOL_GPL(power_supply_unregister);
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void *power_supply_get_drvdata(struct power_supply *psy)
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{
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return psy->drv_data;
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}
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EXPORT_SYMBOL_GPL(power_supply_get_drvdata);
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static int __init power_supply_class_init(void)
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{
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power_supply_class = class_create(THIS_MODULE, "power_supply");
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@ -209,6 +209,9 @@ struct power_supply {
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/* For APM emulation, think legacy userspace. */
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int use_for_apm;
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/* Driver private data */
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void *drv_data;
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/* private */
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struct device *dev;
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struct work_struct changed_work;
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@ -285,6 +288,7 @@ extern int devm_power_supply_register_no_ws(struct device *parent,
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extern void power_supply_unregister(struct power_supply *psy);
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extern int power_supply_powers(struct power_supply *psy, struct device *dev);
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extern void *power_supply_get_drvdata(struct power_supply *psy);
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/* For APM emulation, think legacy userspace. */
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extern struct class *power_supply_class;
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