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| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2013-04-16 00:49:34 +0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2013-04-19 20:05:44 +0400 |
| commit | 0c6a61657da78098472fd0eb71cc01f2387fa1bb (patch) | |
| tree | b4d9cd085eaae625a3231edd1c5e64a9370ecd17 /drivers/input/mouse/trackpoint.h | |
| parent | e07a8943b809730220a4aff911d2bce6991828f1 (diff) | |
| download | linux-0c6a61657da78098472fd0eb71cc01f2387fa1bb.tar.xz | |
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>
Diffstat (limited to 'drivers/input/mouse/trackpoint.h')
| -rw-r--r-- | drivers/input/mouse/trackpoint.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h index e558a7096618..ecd0547964a5 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 @@ struct trackpoint_data unsigned char thresh, upthresh; unsigned char ztime, jenks; + /* toggles */ unsigned char press_to_select; unsigned char skipback; - unsigned char ext_dev; }; |