The ELECOM M-XT3URBK trackball has an additional device ID (0x018F), which
shares the same report descriptor as the existing device (0x00FB). However,
the driver does not currently recognize this new ID, resulting in only five
buttons being functional.

This patch adds the new device ID so that all six buttons work properly.

Signed-off-by: Naoki Ueki <naoki25519@gmail.com>
---
 drivers/hid/hid-elecom.c | 6 ++++--
 drivers/hid/hid-ids.h    | 3 ++-
 drivers/hid/hid-quirks.c | 3 ++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/hid/hid-elecom.c b/drivers/hid/hid-elecom.c
index 69771fd35006..981d1b6e9658 100644
--- a/drivers/hid/hid-elecom.c
+++ b/drivers/hid/hid-elecom.c
@@ -75,7 +75,8 @@ static const __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		 */
 		mouse_button_fixup(hdev, rdesc, *rsize, 20, 28, 22, 14, 8);
 		break;
-	case USB_DEVICE_ID_ELECOM_M_XT3URBK:
+	case USB_DEVICE_ID_ELECOM_M_XT3URBK_00FB:
+	case USB_DEVICE_ID_ELECOM_M_XT3URBK_018F:
 	case USB_DEVICE_ID_ELECOM_M_XT3DRBK:
 	case USB_DEVICE_ID_ELECOM_M_XT4DRBK:
 		/*
@@ -119,7 +120,8 @@ static const __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 static const struct hid_device_id elecom_devices[] = {
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XGL20DLBK) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK_00FB) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK_018F) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3DRBK) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT4DRBK) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_DT1URBK) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 0723b4b1c9ec..2245d85cacf5 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -449,7 +449,8 @@
 #define USB_VENDOR_ID_ELECOM		0x056e
 #define USB_DEVICE_ID_ELECOM_BM084	0x0061
 #define USB_DEVICE_ID_ELECOM_M_XGL20DLBK	0x00e6
-#define USB_DEVICE_ID_ELECOM_M_XT3URBK	0x00fb
+#define USB_DEVICE_ID_ELECOM_M_XT3URBK_00FB	0x00fb
+#define USB_DEVICE_ID_ELECOM_M_XT3URBK_018F	0x018f
 #define USB_DEVICE_ID_ELECOM_M_XT3DRBK	0x00fc
 #define USB_DEVICE_ID_ELECOM_M_XT4DRBK	0x00fd
 #define USB_DEVICE_ID_ELECOM_M_DT1URBK	0x00fe
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index bcd4bccf1a7c..5ec5eded5f0b 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -410,7 +410,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
 #if IS_ENABLED(CONFIG_HID_ELECOM)
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XGL20DLBK) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK_00FB) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK_018F) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3DRBK) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT4DRBK) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_DT1URBK) },
-- 
2.51.2

On Mon, 3 Nov 2025, Naoki Ueki wrote:

> The ELECOM M-XT3URBK trackball has an additional device ID (0x018F), which
> shares the same report descriptor as the existing device (0x00FB). However,
> the driver does not currently recognize this new ID, resulting in only five
> buttons being functional.
> 
> This patch adds the new device ID so that all six buttons work properly.
> 
> Signed-off-by: Naoki Ueki <naoki25519@gmail.com>

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs