[PATCH] Input: alps - Report pressure of v3 and v7 trackstick

["Pali Rohár" <pali.rohar@gmail.com>]

ALPS v3 and v7 packet formats reports trackstick pressure. This information
is already parsed in unused "z" variable.

ALPS SS4 S2 devices already reports trackstick pressure as ABS_PRESSURE
attribute, therefore reports pressure in the same way also for v3 and v7.

This patch also updates parsing v3 pressure information, it is also stored
in 7 bits.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
---
 drivers/input/mouse/alps.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 010c1bcdb06d..0a9e6a3a2f9f 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -139,11 +139,11 @@ static const struct alps_model_info alps_model_data[] = {
 };
 
 static const struct alps_protocol_info alps_v3_protocol_data = {
-	ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
+	ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
 };
 
 static const struct alps_protocol_info alps_v3_rushmore_data = {
-	ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
+	ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
 };
 
 static const struct alps_protocol_info alps_v4_protocol_data = {
@@ -155,7 +155,7 @@ static const struct alps_protocol_info alps_v5_protocol_data = {
 };
 
 static const struct alps_protocol_info alps_v7_protocol_data = {
-	ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
+	ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
 };
 
 static const struct alps_protocol_info alps_v8_protocol_data = {
@@ -583,7 +583,7 @@ static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 
 	x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
 	y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
-	z = (packet[4] & 0x7c) >> 2;
+	z = packet[4] & 0x7c;
 
 	/*
 	 * The x and y values tend to be quite large, and when used
@@ -595,6 +595,7 @@ static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
 
 	input_report_rel(dev, REL_X, x);
 	input_report_rel(dev, REL_Y, -y);
+	input_report_abs(dev, ABS_PRESSURE, z);
 
 	/*
 	 * Most ALPS models report the trackstick buttons in the touchpad
@@ -1118,6 +1119,7 @@ static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
 
 	input_report_rel(dev2, REL_X, (char)x);
 	input_report_rel(dev2, REL_Y, -((char)y));
+	input_report_abs(dev2, ABS_PRESSURE, z);
 
 	input_report_key(dev2, BTN_LEFT, left);
 	input_report_key(dev2, BTN_RIGHT, right);
-- 
2.11.0