7 files changed, 89 insertions, 26 deletions

diff --git a/include/linux/hid.h b/include/linux/hid.h
index efc7787a41a8..f94cf28e4b7c 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -514,10 +514,10 @@ struct hid_device {							/* device report descriptor */
 #ifdef CONFIG_HID_BATTERY_STRENGTH
         /*
          * Power supply information for HID devices which report
-         * battery strength. power_supply is registered iff
-         * battery.name is non-NULL.
+         * battery strength. power_supply was successfully registered if
+         * battery is non-NULL.
          */
-        struct power_supply battery;
+        struct power_supply *battery;
         __s32 battery_min;
         __s32 battery_max;
         __s32 battery_report_type;
diff --git a/include/linux/mfd/abx500/ux500_chargalg.h b/include/linux/mfd/abx500/ux500_chargalg.h
index 234c99143bf7..67703f23e7ba 100644
--- a/include/linux/mfd/abx500/ux500_chargalg.h
+++ b/include/linux/mfd/abx500/ux500_chargalg.h
@@ -9,8 +9,13 @@
 
 #include <linux/power_supply.h>
 
-#define psy_to_ux500_charger(x) container_of((x), \
-                struct ux500_charger, psy)
+/*
+ * Valid only for supplies of type:
+ * - POWER_SUPPLY_TYPE_MAINS,
+ * - POWER_SUPPLY_TYPE_USB,
+ * because only them store as drv_data pointer to struct ux500_charger.
+ */
+#define psy_to_ux500_charger(x) power_supply_get_drvdata(psy)
 
 /* Forward declaration */
 struct ux500_charger;
@@ -35,7 +40,7 @@ struct ux500_charger_ops {
  * @power_path          USB power path support
  */
 struct ux500_charger {
-        struct power_supply psy;
+        struct power_supply *psy;
         struct ux500_charger_ops ops;
         int max_out_volt;
         int max_out_curr;
diff --git a/include/linux/mfd/rt5033.h b/include/linux/mfd/rt5033.h
index 010cff49a98e..6cff5cf458d2 100644
--- a/include/linux/mfd/rt5033.h
+++ b/include/linux/mfd/rt5033.h
@@ -39,7 +39,7 @@ struct rt5033_battery {
         struct i2c_client       *client;
         struct rt5033_dev       *rt5033;
         struct regmap           *regmap;
-        struct power_supply     psy;
+        struct power_supply     *psy;
 };
 
 /* RT5033 charger platform data */
diff --git a/include/linux/mfd/wm8350/supply.h b/include/linux/mfd/wm8350/supply.h
index 2b9479310bbd..8dc93673e34a 100644
--- a/include/linux/mfd/wm8350/supply.h
+++ b/include/linux/mfd/wm8350/supply.h
@@ -123,9 +123,9 @@ struct wm8350_charger_policy {
 
 struct wm8350_power {
         struct platform_device *pdev;
-        struct power_supply battery;
-        struct power_supply usb;
-        struct power_supply ac;
+        struct power_supply *battery;
+        struct power_supply *usb;
+        struct power_supply *ac;
         struct wm8350_charger_policy *policy;
 
         int rev_g_coeff;
diff --git a/include/linux/power/charger-manager.h b/include/linux/power/charger-manager.h
index 416ebeb6ee1e..eadf28cb2fc9 100644
--- a/include/linux/power/charger-manager.h
+++ b/include/linux/power/charger-manager.h
@@ -242,7 +242,8 @@ struct charger_manager {
         int emergency_stop;
 
         char psy_name_buf[PSY_NAME_MAX + 1];
-        struct power_supply charger_psy;
+        struct power_supply_desc charger_psy_desc;
+        struct power_supply *charger_psy;
 
         u64 charging_start_time;
         u64 charging_end_time;
diff --git a/include/linux/power/max17042_battery.h b/include/linux/power/max17042_battery.h
index 89dd84f47c6e..cf112b4075c8 100644
--- a/include/linux/power/max17042_battery.h
+++ b/include/linux/power/max17042_battery.h
@@ -126,7 +126,14 @@ enum max17047_register {
         MAX17047_QRTbl30        = 0x42,
 };
 
-enum max170xx_chip_type {MAX17042, MAX17047};
+enum max170xx_chip_type {
+        MAXIM_DEVICE_TYPE_UNKNOWN       = 0,
+        MAXIM_DEVICE_TYPE_MAX17042,
+        MAXIM_DEVICE_TYPE_MAX17047,
+        MAXIM_DEVICE_TYPE_MAX17050,
+
+        MAXIM_DEVICE_TYPE_NUM
+};
 
 /*
  * used for setting a register to a desired value
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 096dbced02ac..75a1dd8dc56e 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -13,6 +13,7 @@
 #ifndef __LINUX_POWER_SUPPLY_H__
 #define __LINUX_POWER_SUPPLY_H__
 
+#include <linux/device.h>
 #include <linux/workqueue.h>
 #include <linux/leds.h>
 #include <linux/spinlock.h>
@@ -173,22 +174,32 @@ union power_supply_propval {
         const char *strval;
 };
 
-struct device;
 struct device_node;
+struct power_supply;
 
-struct power_supply {
-        const char *name;
-        enum power_supply_type type;
-        enum power_supply_property *properties;
-        size_t num_properties;
+/* Run-time specific power supply configuration */
+struct power_supply_config {
+        struct device_node *of_node;
+        /* Driver private data */
+        void *drv_data;
 
         char **supplied_to;
         size_t num_supplicants;
+};
 
-        char **supplied_from;
-        size_t num_supplies;
-        struct device_node *of_node;
+/* Description of power supply */
+struct power_supply_desc {
+        const char *name;
+        enum power_supply_type type;
+        enum power_supply_property *properties;
+        size_t num_properties;
 
+        /*
+         * Functions for drivers implementing power supply class.
+         * These shouldn't be called directly by other drivers for accessing
+         * this power supply. Instead use power_supply_*() functions (for
+         * example power_supply_get_property()).
+         */
         int (*get_property)(struct power_supply *psy,
                             enum power_supply_property psp,
                             union power_supply_propval *val);
@@ -208,12 +219,27 @@ struct power_supply {
         bool no_thermal;
         /* For APM emulation, think legacy userspace. */
         int use_for_apm;
+};
+
+struct power_supply {
+        const struct power_supply_desc *desc;
+
+        char **supplied_to;
+        size_t num_supplicants;
+
+        char **supplied_from;
+        size_t num_supplies;
+        struct device_node *of_node;
+
+        /* Driver private data */
+        void *drv_data;
 
         /* private */
-        struct device *dev;
+        struct device dev;
         struct work_struct changed_work;
         spinlock_t changed_lock;
         bool changed;
+        atomic_t use_cnt;
 #ifdef CONFIG_THERMAL
         struct thermal_zone_device *tzd;
         struct thermal_cooling_device *tcd;
@@ -256,6 +282,7 @@ extern struct atomic_notifier_head power_supply_notifier;
 extern int power_supply_reg_notifier(struct notifier_block *nb);
 extern void power_supply_unreg_notifier(struct notifier_block *nb);
 extern struct power_supply *power_supply_get_by_name(const char *name);
+extern void power_supply_put(struct power_supply *psy);
 #ifdef CONFIG_OF
 extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
                                                         const char *property);
@@ -274,13 +301,36 @@ extern int power_supply_is_system_supplied(void);
 static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
 #endif
 
-extern int power_supply_register(struct device *parent,
-                                 struct power_supply *psy);
-extern int power_supply_register_no_ws(struct device *parent,
-                                 struct power_supply *psy);
+extern int power_supply_get_property(struct power_supply *psy,
+                            enum power_supply_property psp,
+                            union power_supply_propval *val);
+extern int power_supply_set_property(struct power_supply *psy,
+                            enum power_supply_property psp,
+                            const union power_supply_propval *val);
+extern int power_supply_property_is_writeable(struct power_supply *psy,
+                                        enum power_supply_property psp);
+extern void power_supply_external_power_changed(struct power_supply *psy);
+
+extern struct power_supply *__must_check
+power_supply_register(struct device *parent,
+                                 const struct power_supply_desc *desc,
+                                 const struct power_supply_config *cfg);
+extern struct power_supply *__must_check
+power_supply_register_no_ws(struct device *parent,
+                                 const struct power_supply_desc *desc,
+                                 const struct power_supply_config *cfg);
+extern struct power_supply *__must_check
+devm_power_supply_register(struct device *parent,
+                                 const struct power_supply_desc *desc,
+                                 const struct power_supply_config *cfg);
+extern struct power_supply *__must_check
+devm_power_supply_register_no_ws(struct device *parent,
+                                 const struct power_supply_desc *desc,
+                                 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);
 
+extern void *power_supply_get_drvdata(struct power_supply *psy);
 /* For APM emulation, think legacy userspace. */
 extern struct class *power_supply_class;