[PATCH v1 5/8] hid: Pen battery quirk for Surface Pro 12in

[Harrison Vanderbyl <harrison.vanderbyl@gmail.com>]

The pen setup for this device uses bluetooth for
communicating battery levels and status instead of
reporting it over i2c.

Without this quirk, the device either reports an
extra, broken phantom battery, or hangs.

Signed-off-by: Harrison Vanderbyl <harrison.vanderbyl@gmail.com>
---
 drivers/hid/hid-ids.h   | 1 +
 drivers/hid/hid-input.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 0cf63742315b..d16f55479786 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -459,6 +459,7 @@
 #define USB_DEVICE_ID_HP_X2		0x074d
 #define USB_DEVICE_ID_HP_X2_10_COVER	0x0755
 #define I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM	0x2F81
+#define I2C_DEVICE_ID_SURFACE_PRO_12IN  0x4376
 
 #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 d73cfa2e73d3..61ecd840d0bd 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -395,6 +395,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
 	  HID_BATTERY_QUIRK_AVOID_QUERY },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
 	  HID_BATTERY_QUIRK_AVOID_QUERY },
+	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_PRO_12IN),
+	  HID_BATTERY_QUIRK_IGNORE },
 	/*
 	 * Elan HID touchscreens seem to all report a non present battery,
 	 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices.
-- 
2.53.0