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Input: ALPS - set DualPoint flag for 74 03 28 devices

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Here we introduce logic in alps_identify to set the ALPS_DUALPOINT flag
for touchpad hardware responding to E7 report with 73 03 28, as is found
in the Dell Latitude E7470.

Tested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Ben Gamari <ben@smart-cactus.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ben Gamari 2016-10-04 11:43:30 -07:00 committed by Dmitry Torokhov
parent 7ad8a1067d
commit aeaa881f9b
1 changed files with 7 additions and 0 deletions
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7
drivers/input/mouse/alps.c
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@ -2747,6 +2747,10 @@ static int alps_set_protocol(struct psmouse *psmouse,
if (alps_set_defaults_ss4_v2(psmouse, priv))
return -EIO;
if (priv->fw_ver[1] == 0x1)
priv->flags |= ALPS_DUALPOINT |
ALPS_DUALPOINT_WITH_PRESSURE;
break;
}
@ -2819,6 +2823,9 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
} else if (e7[0] == 0x73 && e7[1] == 0x03 &&
e7[2] == 0x14 && ec[1] == 0x02) {
protocol = &alps_v8_protocol_data;
} else if (e7[0] == 0x73 && e7[1] == 0x03 &&
e7[2] == 0x28 && ec[1] == 0x01) {
protocol = &alps_v8_protocol_data;
} else {
psmouse_dbg(psmouse,
"Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);