HID: hid-input: add Surface Go battery quirk

[ Upstream commit b5539722eb832441f309642fe5102cc3536f92b8 ]

The Elantech touchscreen/digitizer in the Surface Go mistakenly reports
having a battery. This results in a low battery message every time you
try to use the pen.

This patch adds a quirk to ignore the non-existent battery and
gets rid of the false low battery messages.

Signed-off-by: Zoltan Tamas Vajda <zoltan.tamas.vajda@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index cf69191b669311a6c51b956b0f798d4c6288da01..bb096dfb7b363ae7e4c546dbee5694a6c2fcb5a5 100644 (file)
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -391,6 +391,7 @@
 #define USB_DEVICE_ID_HP_X2_10_COVER   0x0755
 #define I2C_DEVICE_ID_HP_SPECTRE_X360_15       0x2817
 #define USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN   0x2706
+#define I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN   0x261A
 
 #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 329b7ffb7e6af69d8f79de69cfe50c16e8a9e734..75a4d8d6bb0fd34217e6731c109ebbb65731a0cc 100644 (file)
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -326,6 +326,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
          HID_BATTERY_QUIRK_IGNORE },
        { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
          HID_BATTERY_QUIRK_IGNORE },
+       { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
+         HID_BATTERY_QUIRK_IGNORE },
        {}
 };