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Tony Lindgren a522f1d0c3 gpio: omap: Fix lost edge wake-up interrupts 
If an edge interrupt triggers while entering idle just before we save
GPIO datain register to saved_datain, the triggered GPIO will not be
noticed on wake-up. This is because the saved_datain and GPIO datain
are the same on wake-up in omap_gpio_unidle(). Let's fix this by
ignoring any pending edge interrupts for saved_datain.

This issue affects only idle states where the GPIO module internal
wake-up path is operational. For deeper idle states where the GPIO
module gets powered off, Linux generic wakeirqs must be used for
the padconf wake-up events with pinctrl-single driver. For examples,
please see "interrupts-extended" dts usage in many drivers.

This issue can be somewhat easily reproduced by pinging an idle system
with smsc911x Ethernet interface configured IRQ_TYPE_EDGE_FALLING. At
some point the smsc911x interrupts will just stop triggering. Also if
WLCORE WLAN is used with EDGE interrupt like it's documentation specifies,
we can see lost interrupts without this patch.

Note that in the long run we may be able to cancel entering idle by
returning an error in gpio_omap_cpu_notifier() on pending interrupts.
But let's fix the bug first.

Also note that because of the recent clean-up efforts this patch does
not apply directly to older kernels. This does fix a long term issue
though, and can be backported as needed.

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-06-12 14:32:04 +02:00
..
accessibility treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 70 2019-05-24 17:36:47 +02:00
acpi Second round of arm64 fixes for -rc2 2019-05-24 11:03:26 -07:00
amba treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
android treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
ata treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 125 2019-05-24 17:39:03 +02:00
atm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37 2019-05-24 17:27:11 +02:00
auxdisplay
base
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block treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 91 2019-05-24 17:37:53 +02:00
bluetooth
bus
cdrom treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
char Fix a soft lockup regression when reading from /dev/random in early boot 2019-05-26 08:30:16 -07:00
clk treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 21 2019-05-21 11:28:47 +02:00
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crypto SPDX update for 5.2-rc2, round 1 2019-05-21 12:33:38 -07:00
dax libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
dca treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 33 2019-05-24 17:27:11 +02:00
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gnss treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
gpio gpio: omap: Fix lost edge wake-up interrupts 2019-06-12 14:32:04 +02:00
gpu SPDX update for 5.2-rc2, round 2 2019-05-24 14:31:58 -07:00
hid gpio: pass lookup and descriptor flags to request_own 2019-06-07 23:20:23 +02:00
hsi treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
hv
hwmon treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
hwspinlock
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i2c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114 2019-05-24 17:39:01 +02:00
i3c treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
ide treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
idle treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
iio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 71 2019-05-24 17:36:47 +02:00
infiniband SPDX update for 5.2-rc2, round 1 2019-05-21 12:33:38 -07:00
input treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 64 2019-05-24 17:36:46 +02:00
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leds treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 89 2019-05-24 17:37:52 +02:00
lightnvm treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
macintosh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
mailbox treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
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md libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
media treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 122 2019-05-24 17:39:03 +02:00
memory gpio: pass lookup and descriptor flags to request_own 2019-06-07 23:20:23 +02:00
memstick treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 17 2019-05-21 11:28:46 +02:00
message treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mfd treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
misc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
mmc SPDX update for 5.2-rc2, round 2 2019-05-24 14:31:58 -07:00
mtd treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102 2019-05-24 17:39:00 +02:00
mux
net SPDX update for 5.2-rc2, round 2 2019-05-24 14:31:58 -07:00
nfc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123 2019-05-24 17:39:03 +02:00
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nubus treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
nvdimm libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
nvme for-linus-20190524 2019-05-24 16:02:14 -07:00
nvmem treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
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opp treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
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parport treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
pci
pcmcia treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
perf First round of arm64 fixes for -rc2 2019-05-22 08:36:16 -07:00
phy treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
pinctrl treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
platform SPDX update for 5.2-rc2, round 2 2019-05-24 14:31:58 -07:00
pnp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
power treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
powercap treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
pps treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
ps3 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
ptp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
pwm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
rapidio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7 2019-05-21 11:28:40 +02:00
ras treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
regulator treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
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reset treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
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rtc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114 2019-05-24 17:39:01 +02:00
s390
sbus treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
scsi SCSI fixes on 20190524 2019-05-24 17:30:28 -07:00
sfi treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
sh treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
siox treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
slimbus
sn treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
soc treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
soundwire treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
spi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 39 2019-05-24 17:27:12 +02:00
spmi treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
ssb treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
staging treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
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tc treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
tee treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
thermal thermal: rcar_gen3_thermal: Update temperature conversion method 2019-05-23 21:58:25 -07:00
thunderbolt treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
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uio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
usb
uwb treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
vfio treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
vhost treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
video treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 73 2019-05-24 17:36:47 +02:00
virt treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
virtio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102 2019-05-24 17:39:00 +02:00
visorbus treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
vlynq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102 2019-05-24 17:39:00 +02:00
vme treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
w1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 94 2019-05-24 17:37:53 +02:00
watchdog treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
xen treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 81 2019-05-24 17:37:51 +02:00
zorro treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig fmc: Delete the FMC subsystem 2019-06-12 14:23:50 +02:00
Makefile fmc: Delete the FMC subsystem 2019-06-12 14:23:50 +02:00