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Hans de Goede 87264fb5ab Input: silead - add workaround for x86 BIOS-es which bring the chip up in a stuck state 
[ Upstream commit e479187748 ]

Some buggy BIOS-es bring up the touchscreen-controller in a stuck
state where it blocks the I2C bus. Specifically this happens on
the Jumper EZpad 7 tablet model.

After much poking at this problem I have found that the following steps
are necessary to unstuck the chip / bus:

1. Turn off the Silead chip.
2. Try to do an I2C transfer with the chip, this will fail in response to
   which the I2C-bus-driver will call: i2c_recover_bus() which will unstuck
   the I2C-bus. Note the unstuck-ing of the I2C bus only works if we first
   drop the chip of the bus by turning it off.
3. Turn the chip back on.

On the x86/ACPI systems were this problem is seen, step 1. and 3. require
making ACPI calls and dealing with ACPI Power Resources. This commit adds
a workaround which runtime-suspends the chip to turn it off, leaving it up
to the ACPI subsystem to deal with all the ACPI specific details.

There is no good way to detect this bug, so the workaround gets activated
by a new "silead,stuck-controller-bug" boolean device-property. Since this
is only used on x86/ACPI, this will be set by model specific device-props
set by drivers/platform/x86/touchscreen_dmi.c. Therefor this new
device-property is not documented in the DT-bindings.

Dmesg will contain the following messages on systems where the workaround
is activated:

[   54.309029] silead_ts i2c-MSSL1680:00: [Firmware Bug]: Stuck I2C bus: please ignore the next 'controller timed out' error
[   55.373593] i2c_designware 808622C1:04: controller timed out
[   55.582186] silead_ts i2c-MSSL1680:00: Silead chip ID: 0x80360000

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210405202745.16777-1-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-22 11:40:52 +02:00
..
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 - fix unaligned access on 7845 2020-12-30 11:53:14 +01:00
ar1021_i2c.c Input: ar1021 - fix typo in preprocessor macro name 2019-11-11 16:02:30 -08:00
atmel_mxt_ts.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2020-12-05 16:16:34 -08:00
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.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
cyttsp_i2c_common.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.c Input: egalax_ts - add system wakeup support 2018-09-18 15:28:07 -07:00
egalax_ts_serial.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ektf2127.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
elants_i2c.c Input: elants_i2c - do not bind to i2c-hid compatible ACPI instantiated devices 2021-05-22 11:40:52 +02:00
elo.c Input: elo - fix an error code in elo_connect() 2021-03-04 11:38:10 +01:00
exc3000.c Input: exc3000 - add support to query model and fw_version 2020-08-06 17:34:19 -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 - add support for Goodix GT9286 chip 2021-02-10 09:29:22 +01:00
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 missing negation for touch indication on ili210x 2021-05-11 14:47:34 +02:00
imx6ul_tsc.c Input: imx6ul_tsc - unify open/close and PM paths 2020-09-16 10:38:57 -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: resistive-adc-touch - fix kconfig dependency on IIO_BUFFER 2020-11-11 17:50:12 -08:00
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 zinitix touchscreen driver 2020-10-04 16:08:09 -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_ts_i2c - do not send zero length 2021-03-04 11:38:23 +01:00
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 ARM: s3c: adc: move header to linux/soc/samsung 2020-08-19 21:44:11 +02:00
s6sy761.c Input: s6sy761 - fix coordinate read bit shift 2021-04-21 13:00:54 +02:00
silead.c Input: silead - add workaround for x86 BIOS-es which bring the chip up in a stuck state 2021-05-22 11:40:52 +02:00
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: stmfts - fix a & vs && typo 2020-09-16 10:38:58 -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 an error code in sur40_probe() 2021-03-04 11:38:09 +01:00
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.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tsc2007_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tsc2007_iio.c iio: remove explicit IIO device parent assignment 2020-06-14 11:49:59 +01:00
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: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
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
zinitix.c Input: zinitix - fix return type of zinitix_init_touch() 2021-03-04 11:38:10 +01:00
zylonite-wm97xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00