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| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2015-03-12 08:44:01 +0100 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2015-03-13 22:52:52 +0100 |
| commit | e44ea364394499d38a26ed4c9668fb378ae8797f (patch) | |
| tree | faa70daae9bf311bcf12a2104e5a533b20a5e41d /include/linux | |
| parent | 1915a718b1872edffcb13e5436a9f7302d3d36f0 (diff) | |
| download | lwn-e44ea364394499d38a26ed4c9668fb378ae8797f.tar.gz lwn-e44ea364394499d38a26ed4c9668fb378ae8797f.zip | |
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>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/power_supply.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index f606d6b4bd56..e30d85c0158d 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -209,6 +209,9 @@ struct power_supply { /* For APM emulation, think legacy userspace. */ int use_for_apm; + /* Driver private data */ + void *drv_data; + /* private */ struct device *dev; struct work_struct changed_work; @@ -285,6 +288,7 @@ extern int devm_power_supply_register_no_ws(struct device *parent, extern void power_supply_unregister(struct power_supply *psy); extern int power_supply_powers(struct power_supply *psy, struct device *dev); +extern void *power_supply_get_drvdata(struct power_supply *psy); /* For APM emulation, think legacy userspace. */ extern struct class *power_supply_class; |