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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 20:53:53 +08:00
linux-next/drivers/input
Brad Griffis 344d635b9a Input: ti_am335x_tsc - remove udelay in interrupt handler
TSC interrupt handler had udelay to avoid reporting of false pen-up
interrupt to user space. This patch implements workaround suggesting in
Advisory 1.0.31 of silicon errata for am335x, thus eliminating udelay and
touchscreen lag. This also improves performance of touchscreen and
eliminates sudden jump of cursor at touch release.

IDLECONFIG and CHARGECONFIG registers are to be configured with same values
in order to eliminate false pen-up events. This workaround may result in
false pen-down to be detected, hence considerable charge step delay needs
to be added. The charge delay is set to 0xB000 (in terms of ADC clock
cycles) by default.

TSC steps are disabled at the end of every sampling cycle and EOS bit is
set. Once the EOS bit is set, the TSC steps need to be re-enabled to begin
next sampling cycle.

Signed-off-by: Brad Griffis <bgriffis@ti.com>
[vigneshr@ti.com: Ported the patch from v3.12 to v3.19rc1]
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-02-03 11:50:38 -08:00
..
gameport Input: initialize device counter variables with -1 2014-12-03 15:27:17 -08:00
joystick Merge branch 'next' into for-linus 2014-12-15 20:32:42 -08:00
keyboard Input: cap11xx - remove wrong and unneeded cap11xx modalias 2015-02-01 11:21:23 -08:00
misc Input: drv2667 - remove wrong and unneeded drv2667-haptics modalias 2015-02-01 11:21:24 -08:00
mouse Input: MT - add support for balanced slot assignment 2015-02-01 11:50:35 -08:00
serio Input: serio - add support for Alwinner A10/A20 PS/2 controller 2015-01-26 23:10:13 -08:00
tablet Input: gtco - use sign_extend32() for sign extension 2015-01-26 23:07:45 -08:00
touchscreen Input: ti_am335x_tsc - remove udelay in interrupt handler 2015-02-03 11:50:38 -08:00
apm-power.c Input: random formatting fixes 2012-08-21 22:29:49 -07:00
evbug.c
evdev.c linux 3.19-rc4 2015-01-15 09:46:14 -08:00
ff-core.c Input: random formatting fixes 2012-08-21 22:29:49 -07:00
ff-memless.c Input: random formatting fixes 2012-08-21 22:29:49 -07:00
input-compat.c compat: Use COMPAT_USE_64BIT_TIME in the input subsystem 2012-02-20 12:48:47 -08:00
input-compat.h compat: Use COMPAT_USE_64BIT_TIME in the input subsystem 2012-02-20 12:48:47 -08:00
input-mt.c Input: MT - add support for balanced slot assignment 2015-02-01 11:50:35 -08:00
input-polldev.c Input: implement managed polled input devices 2014-05-14 16:40:04 -07:00
input.c Input: do not try to filter out events if handler is not a filter 2015-01-08 13:53:34 -08:00
joydev.c Input: fix use-after-free introduced with dynamic minor changes 2012-10-22 08:50:37 +03:00
Kconfig Input: mousedev - allow disabling even without CONFIG_EXPERT 2013-10-31 08:46:07 -07:00
Makefile Input: matrix-keymap - uninline and prepare for device tree support 2012-05-10 22:38:47 -07:00
matrix-keymap.c input: Export matrix_keypad_parse_of_params() 2013-04-19 00:31:13 +02:00
mousedev.c Input: mousedev - fix race when creating mixed device 2014-03-29 14:44:23 -07:00
sparse-keymap.c treewide: Fix typo in Documentation/DocBook 2014-02-19 14:58:17 +01:00