Input: trackpoint - Optimize trackpoint init to use power-on reset
The trackpoint driver sets various parameter default values, all of
which happen to be power-on defaults (Source: IBM TrackPoint Engineering
Specification, Version 4.0. Also confirmed by empirical data).
By sending the power-on reset command to reset all parameters to
power-on state, we can skip the lengthy process of programming all
parameters. In testing, ~2.5 secs of time writing parameters was reduced
to .35 seconds waiting for power-on reset to complete.
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h
index e558a70..ecd0547 100644
--- a/drivers/input/mouse/trackpoint.h
+++ b/drivers/input/mouse/trackpoint.h
@@ -126,6 +126,8 @@
#define TP_DEF_PTSON 0x00
#define TP_DEF_SKIPBACK 0x00
#define TP_DEF_EXT_DEV 0x00 /* 0 means enabled */
+#define TP_DEF_TWOHAND 0x00
+#define TP_DEF_SOURCE_TAG 0x00
#define MAKE_PS2_CMD(params, results, cmd) ((params<<12) | (results<<8) | (cmd))
@@ -136,9 +138,9 @@
unsigned char thresh, upthresh;
unsigned char ztime, jenks;
+ /* toggles */
unsigned char press_to_select;
unsigned char skipback;
-
unsigned char ext_dev;
};