power_supply: Move run-time configuration to separate structure

Add new structure 'power_supply_config' for holding run-time
initialization data like of_node, supplies and private driver data.

The power_supply_register() function is changed so all power supply
drivers need updating.

When registering the power supply this new 'power_supply_config' should be
used instead of directly initializing 'struct power_supply'. This allows
changing the ownership of power_supply structure from driver to the
power supply core in next patches.

When a driver does not use of_node or supplies then it should use NULL
as config. If driver uses of_node or supplies then it should allocate
config on stack and initialize it with proper values.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Pavel Machek <pavel@ucw.cz>

[for the nvec part]
Reviewed-by: Marc Dietrich <marvin24@gmx.de>

[for drivers/platform/x86/compal-laptop.c]
Reviewed-by: Darren Hart <dvhart@linux.intel.com>

[for drivers/hid/*]
Reviewed-by: Jiri Kosina <jkosina@suse.cz>

Signed-off-by: Sebastian Reichel <sre@kernel.org>

1 files changed, 18 insertions, 4 deletions

diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index e30d85c0158d..0d7c95f634a5 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -176,6 +176,16 @@ union power_supply_propval {
 struct device;
 struct device_node;
 
+/* Power supply instance specific configuration */
+struct power_supply_config {
+	struct device_node *of_node;
+	/* Driver private data */
+	void *drv_data;
+
+	char **supplied_to;
+	size_t num_supplicants;
+};
+
 struct power_supply {
 	const char *name;
 	enum power_supply_type type;
@@ -278,13 +288,17 @@ static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 #endif
 
 extern int power_supply_register(struct device *parent,
-				 struct power_supply *psy);
+				 struct power_supply *psy,
+				 const struct power_supply_config *cfg);
 extern int power_supply_register_no_ws(struct device *parent,
-				 struct power_supply *psy);
+				 struct power_supply *psy,
+				 const struct power_supply_config *cfg);
 extern int devm_power_supply_register(struct device *parent,
-				 struct power_supply *psy);
+				 struct power_supply *psy,
+				 const struct power_supply_config *cfg);
 extern int devm_power_supply_register_no_ws(struct device *parent,
-				 struct power_supply *psy);
+				 struct power_supply *psy,
+				 const struct power_supply_config *cfg);
 extern void power_supply_unregister(struct power_supply *psy);
 extern int power_supply_powers(struct power_supply *psy, struct device *dev);