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linux/drivers/input/touchscreen
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Nick Dyer 74d905d2d3 Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary 
The workaround of reading all messages until an invalid is received is a
way of forcing the CHG line high, which means that when using
edge-triggered interrupts the interrupt can be acquired.

With level-triggered interrupts the workaround is unnecessary.

Also, most recent maXTouch chips have a feature called RETRIGEN which, when
enabled, reasserts the interrupt line every cycle if there are messages
waiting. This also makes the workaround unnecessary.

Note: the RETRIGEN feature is only in some firmware versions/chips, it's
not valid simply to enable the bit.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
(cherry picked from ndyer/linux/for-upstream commit 1ae4e8281e491b22442cd5acdfca1862555f8ecb)
[gdavis: Fix conflicts due to v4.6-rc7 commit eb43335c40 ("Input:
	 atmel_mxt_ts - use mxt_acquire_irq in mxt_soft_reset").]
Signed-off-by: George G. Davis <george_davis@mentor.com>
[jiada: reset use_retrigen_workaround at beginning of mxt_check_retrigen()
	call mxt_check_retrigen() after mxt_acquire_irq() in mxt_initialize()
	replace white-spaces with tab for MXT_COMMS_RETRIGEN
	Changed to check if IRQ is level type]
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Link: https://lore.kernel.org/r/20200727151637.23810-1-jiada_wang@mentor.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2020-07-28 18:45:36 -07:00
..
88pm860x-ts.c Input: remove dev_err() usage after platform_get_irq() 2019-08-14 10:49:01 -07:00
ad7877.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 64 2019-05-24 17:36:46 +02:00
ad7879-i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
ad7879-spi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
ad7879.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
ad7879.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
ads7846.c Input: ads7846 - use new delay structure for SPI transfer delays 2020-01-20 20:45:25 -08:00
ar1021_i2c.c Input: ar1021 - fix typo in preprocessor macro name 2019-11-11 16:02:30 -08:00
atmel_mxt_ts.c Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary 2020-07-28 18:45:36 -07:00
auo-pixcir-ts.c Linux 5.2 2019-07-15 09:42:32 -07:00
bcm_iproc_tsc.c Input: remove dev_err() usage after platform_get_irq() 2019-08-14 10:49:01 -07:00
bu21013_ts.c Input: bu21013_ts - switch to using standard touchscreen properties 2019-09-02 09:07:38 -07:00
bu21029_ts.c Input: add bu21029 touch driver 2018-06-24 15:20:12 -07:00
chipone_icn8318.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
chipone_icn8505.c Input: icn8505 - Switch to firmware_request_platform for retreiving the fw 2020-03-20 14:57:54 +01:00
colibri-vf50-ts.c Input: colibri-vf50-ts - remove unneeded gpio.h header file 2019-10-27 11:14:22 -07:00
cy8ctma140.c Input: add driver for the Cypress CY8CTMA140 touchscreen 2020-05-09 22:26:48 -07:00
cy8ctmg110_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 176 2019-05-30 11:29:19 -07:00
cyttsp4_core.c Input: introduce input_mt_report_slot_inactive() 2020-05-12 13:18:26 -07:00
cyttsp4_core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
cyttsp4_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
cyttsp4_spi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
cyttsp_core.c Input: introduce input_mt_report_slot_inactive() 2020-05-12 13:18:26 -07:00
cyttsp_core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
cyttsp_i2c_common.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
cyttsp_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
cyttsp_spi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
da9034-ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
da9052_tsi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dynapro.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
edt-ft5x06.c Input: Use fallthrough pseudo-keyword 2020-07-07 11:25:54 -07:00
eeti_ts.c Linux 5.2 2019-07-15 09:42:32 -07:00
egalax_ts_serial.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
egalax_ts.c Input: egalax_ts - add system wakeup support 2018-09-18 15:28:07 -07:00
ektf2127.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
elants_i2c.c Merge branch 'for-linus' into next 2020-07-21 22:17:27 -07:00
elo.c Input: Use fallthrough pseudo-keyword 2020-07-07 11:25:54 -07:00
exc3000.c Input: exc3000 - switch to i2c's probe_new API 2020-07-06 17:56:44 -07:00
fsl-imx25-tcq.c Input: remove dev_err() usage after platform_get_irq() 2019-08-14 10:49:01 -07:00
fujitsu_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
goodix.c Input: goodix - fix compilation when ACPI support is disabled 2020-04-01 13:05:29 -07:00
gunze.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hampshire.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
hideep.c Input: hideep - switch to use device_property_count_u32() 2019-08-12 00:03:11 -07:00
hp680_ts_input.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
htcpen.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ili210x.c Input: ili210x - add ili2120 support 2020-02-10 10:00:22 -08:00
imx6ul_tsc.c Input: remove dev_err() usage after platform_get_irq() 2019-08-14 10:49:01 -07:00
inexio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ipaq-micro-ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
iqs5xx.c Input: Use fallthrough pseudo-keyword 2020-07-07 11:25:54 -07:00
jornada720_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
Kconfig Input: add driver for the Cypress CY8CTMA140 touchscreen 2020-05-09 22:26:48 -07:00
lpc32xx_ts.c Input: remove dev_err() usage after platform_get_irq() 2019-08-14 10:49:01 -07:00
mainstone-wm97xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Makefile Input: add driver for the Cypress CY8CTMA140 touchscreen 2020-05-09 22:26:48 -07:00
max11801_ts.c Input: Use fallthrough pseudo-keyword 2020-07-07 11:25:54 -07:00
mc13783_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mcs5000_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
melfas_mip4.c Input: introduce input_mt_report_slot_inactive() 2020-05-12 13:18:26 -07:00
migor_ts.c Input: migor_ts - convert to SPDX identifiers 2018-11-12 11:52:05 -08:00
mk712.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mms114.c Merge branch 'for-linus' into next 2020-05-17 21:10:28 -07:00
mtouch.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mxs-lradc-ts.c Input: mxs-lradc-ts - use devm_platform_ioremap_resource() 2019-07-24 12:48:47 +03:00
of_touchscreen.c Input: of_touchscreen - explicitly choose axis 2020-03-24 15:21:24 -07:00
pcap_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
penmount.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pixcir_i2c_ts.c Input: pixcir_i2c_ts - remove platform data 2019-10-09 14:56:40 -07:00
raspberrypi-ts.c Input: introduce input_mt_report_slot_inactive() 2020-05-12 13:18:26 -07:00
raydium_i2c_ts.c Input: raydium_i2c_ts - fix error codes in raydium_i2c_boot_trigger() 2020-03-06 14:37:56 -08:00
resistive-adc-touch.c input: touchscreen: resistive-adc-touch: add generic resistive ADC touchscreen 2018-06-10 13:26:40 +01:00
rohm_bu21023.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
s3c2410_ts.c Input: s3c2410_ts - remove unneeded gpio.h header file 2019-10-27 11:14:24 -07:00
s6sy761.c Input: stmfts, s6sy761 - update my e-mail 2018-03-30 15:31:41 -07:00
silead.c Input: silead - Switch to firmware_request_platform for retreiving the fw 2020-03-20 14:57:53 +01:00
sis_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
st1232.c Input: st1232 - switch to using MT-B protocol 2019-10-28 21:04:27 -07:00
stmfts.c Input: Use fallthrough pseudo-keyword 2020-07-07 11:25:54 -07:00
stmpe-ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i-ts.c Input: sun4i-ts - add a check for devm_thermal_zone_of_sensor_register 2020-01-10 14:42:52 -08:00
sur40.c Input: sur40 - fix interface sanity checks 2020-01-10 14:43:01 -08:00
surface3_spi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
sx8654.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ti_am335x_tsc.c Input: ti_am335x_tsc - remove set but not used variable 'tscadc_dev' 2019-02-19 10:38:19 -08:00
touchit213.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
touchright.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
touchwin.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tps6507x-ts.c Input: tsc6507x-ts - switch to using polled mode of input devices 2019-10-29 17:13:41 -07:00
ts4800-ts.c Input: ts4800-ts - switch to using polled mode of input devices 2019-10-29 17:13:40 -07:00
tsc40.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 315 2019-06-05 17:37:05 +02:00
tsc200x-core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
tsc200x-core.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsc2004.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
tsc2005.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
tsc2007_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tsc2007_iio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tsc2007.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ucb1400_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
usbtouchscreen.c Input: usbtouchscreen - add support for BonXeon TP 2020-04-18 21:31:20 -07:00
wacom_i2c.c Input: wacom_i2c - remove unneeded gpio.h header file 2019-10-27 11:14:25 -07:00
wacom_w8001.c Input: wacom_w8001 - allocate additional space for 'phys' 2019-08-20 12:03:46 -07:00
wdt87xx_i2c.c Input: wdt87xx_i2c - replace mdelay() with msleep() in wdt87xx_resume() 2018-07-27 11:59:05 -07:00
wm97xx-core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wm831x-ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wm9705.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wm9712.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wm9713.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
zet6223.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
zforce_ts.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
zylonite-wm97xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00