[RFC PATCHv2 01/19] power_supply: Add driver private data
From: Krzysztof Kozlowski <hidden>
Date: 2015-01-05 15:48:25
Also in:
linux-acpi, linux-pm, lkml
Subsystem:
power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
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 <redacted>
---
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 694e8cddd5c1..84ef3f40e7bf 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c@@ -629,6 +629,12 @@ 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 096dbced02ac..a5743f24e03e 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;
@@ -281,6 +284,7 @@ extern int 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