ACPI: battery: Pass battery hook pointer to hook callbacks

Right now, is impossible for battery hook callbacks
to access instance-specific data, forcing most drivers
to provide some sort of global state. This however is
difficult for drivers which can be instantiated multiple
times and/or are hotplug-capable.

Pass a pointer to the battery hook to those callbacks
for usage with container_of().
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20220927204521.601887-2-W_Armin@gmx.deReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/acpi/battery.c

@@ -696,7 +696,7 @@ static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock)
 	if (lock)
 		mutex_lock(&hook_mutex);
 	list_for_each_entry(battery, &acpi_battery_list, list) {
-		hook->remove_battery(battery->bat);
+		hook->remove_battery(battery->bat, hook);
 	}
 	list_del(&hook->list);
 	if (lock)
@@ -724,7 +724,7 @@ void battery_hook_register(struct acpi_battery_hook *hook)
 	 * its attributes.
 	 */
 	list_for_each_entry(battery, &acpi_battery_list, list) {
-		if (hook->add_battery(battery->bat)) {
+		if (hook->add_battery(battery->bat, hook)) {
 			/*
 			 * If a add-battery returns non-zero,
 			 * the registration of the extension has failed,
@@ -762,7 +762,7 @@ static void battery_hook_add_battery(struct acpi_battery *battery)
 	 * during the battery module initialization.
 	 */
 	list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) {
-		if (hook_node->add_battery(battery->bat)) {
+		if (hook_node->add_battery(battery->bat, hook_node)) {
 			/*
 			 * The notification of the extensions has failed, to
 			 * prevent further errors we will unload the extension.
@@ -785,7 +785,7 @@ static void battery_hook_remove_battery(struct acpi_battery *battery)
 	 * custom attributes from the battery.
 	 */
 	list_for_each_entry(hook, &battery_hook_list, list) {
-		hook->remove_battery(battery->bat);
+		hook->remove_battery(battery->bat, hook);
 	}
 	/* Then, just remove the battery from the list */
 	list_del(&battery->list);

drivers/platform/x86/asus-wmi.c

@@ -883,7 +883,7 @@ static ssize_t charge_control_end_threshold_show(struct device *device,
 
 static DEVICE_ATTR_RW(charge_control_end_threshold);
 
-static int asus_wmi_battery_add(struct power_supply *battery)
+static int asus_wmi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	/* The WMI method does not provide a way to specific a battery, so we
 	 * just assume it is the first battery.
@@ -910,7 +910,7 @@ static int asus_wmi_battery_add(struct power_supply *battery)
 	return 0;
 }
 
-static int asus_wmi_battery_remove(struct power_supply *battery)
+static int asus_wmi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	device_remove_file(&battery->dev,
 			   &dev_attr_charge_control_end_threshold);

drivers/platform/x86/huawei-wmi.c

@@ -468,7 +468,7 @@ static DEVICE_ATTR_RW(charge_control_start_threshold);
 static DEVICE_ATTR_RW(charge_control_end_threshold);
 static DEVICE_ATTR_RW(charge_control_thresholds);
 
-static int huawei_wmi_battery_add(struct power_supply *battery)
+static int huawei_wmi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	int err = 0;
 
@@ -483,7 +483,7 @@ static int huawei_wmi_battery_add(struct power_supply *battery)
 	return err;
 }
 
-static int huawei_wmi_battery_remove(struct power_supply *battery)
+static int huawei_wmi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	device_remove_file(&battery->dev, &dev_attr_charge_control_start_threshold);
 	device_remove_file(&battery->dev, &dev_attr_charge_control_end_threshold);

drivers/platform/x86/lg-laptop.c

@@ -546,7 +546,7 @@ static DEVICE_ATTR_RW(fn_lock);
 static DEVICE_ATTR_RW(charge_control_end_threshold);
 static DEVICE_ATTR_RW(battery_care_limit);
 
-static int lg_battery_add(struct power_supply *battery)
+static int lg_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	if (device_create_file(&battery->dev,
 			       &dev_attr_charge_control_end_threshold))
@@ -555,7 +555,7 @@ static int lg_battery_add(struct power_supply *battery)
 	return 0;
 }
 
-static int lg_battery_remove(struct power_supply *battery)
+static int lg_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	device_remove_file(&battery->dev,
 			   &dev_attr_charge_control_end_threshold);

drivers/platform/x86/system76_acpi.c

@@ -254,7 +254,7 @@ static struct attribute *system76_battery_attrs[] = {
 
 ATTRIBUTE_GROUPS(system76_battery);
 
-static int system76_battery_add(struct power_supply *battery)
+static int system76_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	// System76 EC only supports 1 battery
 	if (strcmp(battery->desc->name, "BAT0") != 0)
@@ -266,7 +266,7 @@ static int system76_battery_add(struct power_supply *battery)
 	return 0;
 }
 
-static int system76_battery_remove(struct power_supply *battery)
+static int system76_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	device_remove_groups(&battery->dev, system76_battery_groups);
 	return 0;

drivers/platform/x86/thinkpad_acpi.c

@@ -9907,7 +9907,7 @@ ATTRIBUTE_GROUPS(tpacpi_battery);
 
 /* ACPI battery hooking */
 
-static int tpacpi_battery_add(struct power_supply *battery)
+static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	int batteryid = tpacpi_battery_get_id(battery->desc->name);
 
@@ -9918,7 +9918,7 @@ static int tpacpi_battery_add(struct power_supply *battery)
 	return 0;
 }
 
-static int tpacpi_battery_remove(struct power_supply *battery)
+static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	device_remove_groups(&battery->dev, tpacpi_battery_groups);
 	return 0;

drivers/platform/x86/toshiba_acpi.c

@@ -3113,7 +3113,7 @@ static struct attribute *toshiba_acpi_battery_attrs[] = {
 
 ATTRIBUTE_GROUPS(toshiba_acpi_battery);
 
-static int toshiba_acpi_battery_add(struct power_supply *battery)
+static int toshiba_acpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	if (toshiba_acpi == NULL) {
 		pr_err("Init order issue\n");
@@ -3126,7 +3126,7 @@ static int toshiba_acpi_battery_add(struct power_supply *battery)
 	return 0;
 }
 
-static int toshiba_acpi_battery_remove(struct power_supply *battery)
+static int toshiba_acpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
 {
 	device_remove_groups(&battery->dev, toshiba_acpi_battery_groups);
 	return 0;

include/acpi/battery.h

@@ -12,8 +12,8 @@
 
 struct acpi_battery_hook {
 	const char *name;
-	int (*add_battery)(struct power_supply *battery);
-	int (*remove_battery)(struct power_supply *battery);
+	int (*add_battery)(struct power_supply *battery, struct acpi_battery_hook *hook);
+	int (*remove_battery)(struct power_supply *battery, struct acpi_battery_hook *hook);
 	struct list_head list;
 };