[PATCH 2/2] Input: synaptics - add LEN2072 to smbus_pnp_ids for ThinkPad P14s Gen 2i

[Dmitry Mikushin]

The ThinkPad P14s Gen 2i (20VX) has a Synaptics TM3471-030 touchpad
(PNP ID LEN2072, firmware 3324237) that supports SMBus/RMI4, but it is
not in smbus_pnp_ids[], so psmouse drives it in legacy PS/2 mode. There
it is limited to two tracked contacts and shares the i8042 channel with
the TrackPoint.

With psmouse.synaptics_intertouch=1 the touchpad binds to rmi4 at SMBus
address 0x2c, reports four contacts, and the TrackPoint keeps working
through the RMI4 pass-through port. Suspend/resume (s2idle) works.

Add LEN2072 to the smbus_pnp_ids[] passlist.

Signed-off-by: Dmitry Mikushin <dmitry@xxxxxxxxxxxxx>
---
 drivers/input/mouse/synaptics.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 1ed9261bff..b007e642ea 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -194,6 +194,7 @@ static const char * const smbus_pnp_ids[] = {
 	"LEN2058", /* E490 */
 	"LEN205b", /* T490 */
 	"LEN2068", /* T14 Gen 1 */
+	"LEN2072", /* P14s Gen 2i */
 	"SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */
 	"SYN3003", /* HP EliteBook 850 G1 */
 	"SYN3015", /* HP EliteBook 840 G2 */
-- 
2.56.0