[PATCH 6.12 175/265] HID: multitouch: add device ID for Apple Touch Bar

Greg Kroah-Hartman
2026-03-12T20:23:13Z

From: Kerem Karabay <kekrby@gmail.com>

[ Upstream commit 2c31ec923c323229566d799267000f8123af4449 ]

This patch adds the device ID of Apple Touch Bar found on x86 MacBook Pros
to the hid-multitouch driver.

Note that this is device ID is for T2 Macs. Testing on T1 Macs would be
appreciated.

Signed-off-by: Kerem Karabay <kekrby@gmail.com>
Co-developed-by: Aditya Garg <gargaditya08@live.com>
Signed-off-by: Aditya Garg <gargaditya08@live.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Stable-dep-of: a2e70a89fa58 ("HID: multitouch: new class MT_CLS_EGALAX_P80H84")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hid/Kconfig | 1 +
drivers/hid/hid-multitouch.c | 17 +++++++++++++++++
2 files changed, 18 insertions(+)

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index f283f271d87e7..586de50a26267 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -730,6 +730,7 @@ config HID_MULTITOUCH
Say Y here if you have one of the following devices:
- 3M PCT touch screens
- ActionStar dual touch panels
+ - Apple Touch Bar on x86 MacBook Pros
- Atmel panels
- Cando dual touch panels
- Chunghwa panels
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index b7c2640a61b4a..5aed9e320d306 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -216,6 +216,7 @@ static void mt_post_parse(struct mt_device *td, struct mt_application *app);
#define MT_CLS_GOOGLE 0x0111
#define MT_CLS_RAZER_BLADE_STEALTH 0x0112
#define MT_CLS_SMART_TECH 0x0113
+#define MT_CLS_APPLE_TOUCHBAR 0x0114
#define MT_CLS_SIS 0x0457

#define MT_DEFAULT_MAXCONTACT 10
@@ -402,6 +403,12 @@ static const struct mt_class mt_classes[] = {
MT_QUIRK_CONTACT_CNT_ACCURATE |
MT_QUIRK_SEPARATE_APP_REPORT,
},
+ { .name = MT_CLS_APPLE_TOUCHBAR,
+ .quirks = MT_QUIRK_HOVERING |
+ MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE |
+ MT_QUIRK_APPLE_TOUCHBAR,
+ .maxcontacts = 11,
+ },
{ .name = MT_CLS_SIS,
.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
MT_QUIRK_ALWAYS_VALID |
@@ -1842,6 +1849,11 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
if (ret != 0)
return ret;

+ if (mtclass->name == MT_CLS_APPLE_TOUCHBAR &&
+ !hid_find_field(hdev, HID_INPUT_REPORT,
+ HID_DG_TOUCHPAD, HID_DG_TRANSDUCER_INDEX))
+ return -ENODEV;
+
if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
mt_fix_const_fields(hdev, HID_DG_CONTACTID);

@@ -2332,6 +2344,11 @@ static const struct hid_device_id mt_devices[] = {
MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
USB_DEVICE_ID_XIROKU_CSR2) },

+ /* Apple Touch Bar */
+ { .driver_data = MT_CLS_APPLE_TOUCHBAR,
+ HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
+ USB_DEVICE_ID_APPLE_TOUCHBAR_DISPLAY) },
+
/* Google MT devices */
{ .driver_data = MT_CLS_GOOGLE,
HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
--
2.51.0