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| author | Bernhard Bender <[email protected]> | 2015-07-23 20:58:08 +0000 |
|---|---|---|
| committer | Dmitry Torokhov <[email protected]> | 2015-07-23 21:43:17 +0000 |
| commit | 968491709e5b1aaf429428814fff3d932fa90b60 (patch) | |
| tree | 370200624d8cbde19c03e053fa0dcac8370db16d /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | Input: elantech - force resolution of 31 u/mm (diff) | |
| download | kernel-968491709e5b1aaf429428814fff3d932fa90b60.tar.gz kernel-968491709e5b1aaf429428814fff3d932fa90b60.zip | |
Input: usbtouchscreen - avoid unresponsive TSC-30 touch screen
This patch fixes a problem in the usbtouchscreen driver for DMC TSC-30
touch screen. Due to a missing delay between the RESET and SET_RATE
commands, the touch screen may become unresponsive during system startup or
driver loading.
According to the DMC documentation, a delay is needed after the RESET
command to allow the chip to complete its internal initialization. As this
delay is not guaranteed, we had a system where the touch screen
occasionally did not send any touch data. There was no other indication of
the problem.
The patch fixes the problem by adding a 150ms delay between the RESET and
SET_RATE commands.
Cc: [email protected]
Suggested-by: Jakob Mustafa <[email protected]>
Signed-off-by: Bernhard Bender <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions