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Subject[PATCH v5 1/8] Input: elantech - correct x, y value range for v2 hardware
Date
x, y values are actually 12-bit long. Also update protocol document to reflect
the change.

Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Acked-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Éric Piel <eric.piel@tremplin-utc.net>
---
Documentation/input/elantech.txt | 8 ++++----
drivers/input/mouse/elantech.c | 8 ++++----
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/Documentation/input/elantech.txt b/Documentation/input/elantech.txt
index db798af..bce9941 100644
--- a/Documentation/input/elantech.txt
+++ b/Documentation/input/elantech.txt
@@ -389,14 +389,14 @@ byte 0:
byte 1:

bit 7 6 5 4 3 2 1 0
- p7 p6 p5 p4 . x10 x9 x8
+ p7 p6 p5 p4 x11 x10 x9 x8

byte 2:

bit 7 6 5 4 3 2 1 0
x7 x6 x5 x4 x3 x2 x1 x0

- x10..x0 = absolute x value (horizontal)
+ x11..x0 = absolute x value (horizontal)

byte 3:

@@ -420,7 +420,7 @@ byte 3:
byte 4:

bit 7 6 5 4 3 2 1 0
- p3 p1 p2 p0 . . y9 y8
+ p3 p1 p2 p0 y11 y10 y9 y8

p7..p0 = pressure (not EF113)

@@ -429,7 +429,7 @@ byte 5:
bit 7 6 5 4 3 2 1 0
y7 y6 y5 y4 y3 y2 y1 y0

- y9..y0 = absolute y value (vertical)
+ y11..y0 = absolute y value (vertical)


4.2.2 Two finger touch
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 3250356..da161da 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -290,15 +290,15 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
/* pass through... */
case 1:
/*
- * byte 1: . . . . . x10 x9 x8
+ * byte 1: . . . . x11 x10 x9 x8
* byte 2: x7 x6 x5 x4 x4 x2 x1 x0
*/
- x1 = ((packet[1] & 0x07) << 8) | packet[2];
+ x1 = ((packet[1] & 0x0f) << 8) | packet[2];
/*
- * byte 4: . . . . . . y9 y8
+ * byte 4: . . . . y11 y10 y9 y8
* byte 5: y7 y6 y5 y4 y3 y2 y1 y0
*/
- y1 = ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5]);
+ y1 = ETP_YMAX_V2 - (((packet[4] & 0x0f) << 8) | packet[5]);

input_report_abs(dev, ABS_X, x1);
input_report_abs(dev, ABS_Y, y1);
--
1.7.4.1
--
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