From: contacto@bazaes.cl
To: dmitry.torokhov@gmail.com
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
"Nicolás Bazaes" <contacto@bazaes.cl>
Subject: [PATCH] Input: synaptics - add LEN2058 to SMBus passlist for ThinkPad E490
Date: Wed, 13 May 2026 00:57:44 -0400 [thread overview]
Message-ID: <20260513045749.185969-1-contacto@bazaes.cl> (raw)
From: Nicolás Bazaes <contacto@bazaes.cl>
The Lenovo ThinkPad E490 (PNP ID: LEN2058) has a Synaptics TM3471-020
touchpad that supports SMBus/RMI4 mode but is not listed in
smbus_pnp_ids[]. Without this entry, psmouse ignores the
synaptics_intertouch parameter and falls back to PS/2 mode even when
explicitly requested.
Adding LEN2058 to the passlist enables RMI4 over SMBus, which provides
better multitouch support and matches the behavior of similar ThinkPad
models already in the list (E480/LEN2054, E580/LEN2055).
Tested on ThinkPad E490 with kernel 7.0.5-zen1 and Arch Linux.
Signed-off-by: Nicolás Bazaes <contacto@bazaes.cl>
Assisted-by: Claude <claude.ai>
---
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 26071128f..c70502e24 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -190,6 +190,7 @@ static const char * const smbus_pnp_ids[] = {
"LEN2044", /* L470 */
"LEN2054", /* E480 */
"LEN2055", /* E580 */
+ "LEN2058", /* E490 */
"LEN2068", /* T14 Gen 1 */
"SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */
"SYN3003", /* HP EliteBook 850 G1 */
--
2.54.0
next reply other threads:[~2026-05-13 4:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-13 4:57 contacto [this message]
2026-05-13 21:27 ` [PATCH] Input: synaptics - add LEN2058 to SMBus passlist for ThinkPad E490 Dmitry Torokhov
2026-05-14 1:35 ` [PATCH v2] " contacto
2026-05-14 1:22 ` [PATCH] " sashiko-bot
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