[PATCH 5.19 0019/1157] HID: hid-input: add Surface Go battery quirk

Greg Kroah-Hartman
2022-08-15T21:50:13Z

From: Maximilian Luz <luzmaximilian@gmail.com>

commit db925d809011c37b246434fdce71209fc2e6c0c2 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-ids.h | 1 +
drivers/hid/hid-input.c | 2 ++
2 files changed, 3 insertions(+)

--- 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
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -381,6 +381,8 @@ static const struct hid_device_id hid_ba
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 },
{}
};