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@xxxxxxxxxxx>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Reviewed-by: Sebastian Reichel <sre@xxxxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
---
drivers/power/power_supply_core.c | 6 ++++++
include/linux/power_supply.h | 4 ++++
2 files changed, 10 insertions(+)
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 44c810456212..1c0978f961ea 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -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");
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;
--
1.9.1
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