4.17-stable review patch. If anyone has any objections, please let me know.
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From: Aaron Ma aaron.ma@canonical.com
commit 24bb555e6e46d96e2a954aa0295029a81cc9bbaa upstream.
PNPID is better way to identify the type of touchpads. Enable middle button support on 2 types of touchpads on Lenovo P52.
Cc: stable@vger.kernel.org Signed-off-by: Aaron Ma aaron.ma@canonical.com Reviewed-by: Benjamin Tissoires benjamin.tissoires@redhat.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/input/mouse/elantech.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1169,6 +1169,12 @@ static const struct dmi_system_id elante { } };
+static const char * const middle_button_pnp_ids[] = { + "LEN2131", /* ThinkPad P52 w/ NFC */ + "LEN2132", /* ThinkPad P52 */ + NULL +}; + /* * Set the appropriate event bits for the input subsystem */ @@ -1188,7 +1194,8 @@ static int elantech_set_input_params(str __clear_bit(EV_REL, dev->evbit);
__set_bit(BTN_LEFT, dev->keybit); - if (dmi_check_system(elantech_dmi_has_middle_button)) + if (dmi_check_system(elantech_dmi_has_middle_button) || + psmouse_matches_pnp_id(psmouse, middle_button_pnp_ids)) __set_bit(BTN_MIDDLE, dev->keybit); __set_bit(BTN_RIGHT, dev->keybit);