HID: hid-input: add Surface Go battery quirk

Similar to the Surface Go (1), the (Elantech) touchscreen/digitizer in
the Surface Go 2 mistakenly reports the battery of the stylus. Instead
of over the touchscreen device, battery information is provided via
bluetooth and the touchscreen device reports an empty battery.

Apply the HID_BATTERY_QUIRK_IGNORE quirk to ignore this battery and
prevent the erroneous low battery warnings.

Cc: stable@vger.kernel.org
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index d9eb676abe9600b7a6c96b9cd794cb8383c058c7..9c4e92a9c64606c9ef23a369bd7c3dd50692c3b3 100644 (file)
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -413,6 +413,7 @@
 #define USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN 0x2544
 #define USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN   0x2706
 #define I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN   0x261A
+#define I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN  0x2A1C
 
 #define USB_VENDOR_ID_ELECOM           0x056e
 #define USB_DEVICE_ID_ELECOM_BM084     0x0061

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index c6b27aab90414946c8bac910c89bcb7b617d151e..48c1c02c69f4e7f20cad6cab23da68d9ee8fabb2 100644 (file)
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -381,6 +381,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
          HID_BATTERY_QUIRK_IGNORE },
        { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
          HID_BATTERY_QUIRK_IGNORE },
+       { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
+         HID_BATTERY_QUIRK_IGNORE },
        {}
 };