Merge branch 'for-7.1/core-v2' into for-linus

- fixed handling of 0-sized reports (Dmitry Torokhov)
- convert core code to __free() (Dmitry Torokhov)
- support for multiple batteries per HID device (Lucas Zampieri)

1 files changed, 44 insertions, 13 deletions

diff --git a/include/linux/hid.h b/include/linux/hid.h
index 31324609af4d..fb1a3f3ad9fa 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -634,6 +634,38 @@ enum hid_battery_status {
 	HID_BATTERY_REPORTED,		/* Device sent unsolicited battery strength report */
 };
 
+/**
+ * struct hid_battery - represents a single battery power supply
+ * @dev: pointer to the parent hid_device
+ * @ps: the power supply instance
+ * @min: minimum battery value from HID descriptor
+ * @max: maximum battery value from HID descriptor
+ * @report_type: HID report type (input/feature)
+ * @report_id: HID report ID for this battery
+ * @charge_status: current charging status
+ * @status: battery reporting status
+ * @capacity: current battery capacity (0-100)
+ * @avoid_query: if true, avoid querying battery (e.g., for stylus)
+ * @present: if true, battery is present (may be dynamic)
+ * @ratelimit_time: rate limiting for battery reports
+ * @list: list node for linking into hid_device's battery list
+ */
+struct hid_battery {
+	struct hid_device *dev;
+	struct power_supply *ps;
+	__s32 min;
+	__s32 max;
+	__s32 report_type;
+	__s32 report_id;
+	__s32 charge_status;
+	enum hid_battery_status status;
+	__s32 capacity;
+	bool avoid_query;
+	bool present;
+	ktime_t ratelimit_time;
+	struct list_head list;
+};
+
 struct hid_driver;
 struct hid_ll_driver;
 
@@ -670,20 +702,10 @@ struct hid_device {
 #ifdef CONFIG_HID_BATTERY_STRENGTH
 	/*
 	 * Power supply information for HID devices which report
-	 * battery strength. power_supply was successfully registered if
-	 * battery is non-NULL.
+	 * battery strength. Each battery is tracked separately in the
+	 * batteries list.
 	 */
-	struct power_supply *battery;
-	__s32 battery_capacity;
-	__s32 battery_min;
-	__s32 battery_max;
-	__s32 battery_report_type;
-	__s32 battery_report_id;
-	__s32 battery_charge_status;
-	enum hid_battery_status battery_status;
-	bool battery_avoid_query;
-	bool battery_present;
-	ktime_t battery_ratelimit_time;
+	struct list_head batteries;
 #endif
 
 	unsigned long status;						/* see STAT flags above */
@@ -744,6 +766,15 @@ static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
 	dev_set_drvdata(&hdev->dev, data);
 }
 
+#ifdef CONFIG_HID_BATTERY_STRENGTH
+static inline struct hid_battery *hid_get_battery(struct hid_device *hdev)
+{
+	if (list_empty(&hdev->batteries))
+		return NULL;
+	return list_first_entry(&hdev->batteries, struct hid_battery, list);
+}
+#endif
+
 #define HID_GLOBAL_STACK_SIZE 4
 #define HID_COLLECTION_STACK_SIZE 4