Daniel Glöckner ff77c352ae gpiolib: allow poll() on value ... Many gpio chips allow to generate interrupts when the value of a pin changes. This patch gives usermode application the opportunity to make use of this feature by calling poll(2) on the /sys/class/gpio/gpioN/value sysfs file. The edge to trigger can be set in the edge file in the same directory. Possible values are "none", "rising", "falling", and "both". Using level triggers is not possible with current sysfs since nothing changes the GPIO value (and the IRQ keeps triggering). Edge triggering will "just work". Note that if there was an event between read() and poll(), the poll() returns immediately. Also note that this version only supports true GPIO interrupts. Some later patch might be able to synthesize this behavior by timer-driven polling; some systems seem to need that. [dbrownell@users.sourceforge.net: align ids to 16 bit ids; whitespace] Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-09-23 07:39:48 -07:00
..
accessibility
acpi	x86: Trivial whitespace cleanups	2009-09-20 20:18:57 +02:00
amba	Merge branches 'arm', 'at91', 'bcmring', 'ep93xx', 'mach-types', 'misc' and 'w90x900' into devel	2009-09-12 12:01:34 +01:00
ata	trivial: fix comment typo in drivers/ata/pata_hpt37x.c	2009-09-21 15:15:53 +02:00
atm
auxdisplay
base	mm: oom analysis: add shmem vmstat	2009-09-22 07:17:27 -07:00
block	seq_file: constify seq_operations	2009-09-23 07:39:29 -07:00
bluetooth	pcmcia: dtl1_cs: fix pcmcia_loop_config logic	2009-09-15 10:17:16 -07:00
cdrom	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
char	BUILD_BUG_ON(): fix it and a couple of bogus uses of it	2009-09-23 07:39:29 -07:00
clocksource
connector	proc connector: add event for process becoming session leader	2009-09-23 07:39:29 -07:00
cpufreq	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq	2009-09-18 09:16:57 -07:00
cpuidle	cpuidle: menu governor: reduce latency on exit	2009-09-22 07:17:45 -07:00
crypto
dca
dio
dma	at_hdmac: Rework suspend_late()/resume_early()	2009-09-14 20:27:00 +02:00
edac	trivial: fix typo "for for" in multiple files	2009-09-21 15:14:54 +02:00
eisa
firewire	driver model: constify attribute groups	2009-09-15 09:50:47 -07:00
firmware	mm: don't use alloc_bootmem_low() where not strictly needed	2009-09-22 07:17:38 -07:00
gpio	gpiolib: allow poll() on value	2009-09-23 07:39:48 -07:00
gpu	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2009-09-22 07:51:28 -07:00
hwmon	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
i2c	[PATCH] i2c-imx: make bus available early	2009-09-19 23:36:56 +01:00
ide	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
idle
ieee1394
ieee802154
infiniband	walk system ram range	2009-09-23 07:39:41 -07:00
input	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
isdn	seq_file: constify seq_operations	2009-09-23 07:39:29 -07:00
leds	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
lguest	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
macintosh	trivial: remove unnecessary semicolons	2009-09-21 15:14:58 +02:00
mca
md	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
media	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
memstick	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
message	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
mfd	mfd/gpio: add a GPIO interface to the UCB1400 MFD chip driver via gpiolib	2009-09-23 07:39:48 -07:00
misc	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
mmc	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
mtd	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
net	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
nubus
of	of: remove "stm,m25p40" alias	2009-09-23 07:39:43 -07:00
oprofile	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
parisc	mm: replace various uses of num_physpages by totalram_pages	2009-09-22 07:17:38 -07:00
parport
pci	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-09-16 07:49:54 -07:00
pcmcia	pcmcia: cleanup/fixup patch for sa1100_jornada_pcmcia driver	2009-09-22 07:17:42 -07:00
platform	hp-wmi: Switch driver to dev_pm_ops	2009-09-14 20:26:59 +02:00
pnp	pnp: add a shutdown method to pnp drivers	2009-09-22 07:17:49 -07:00
power
pps
ps3	powerpc/ps3: Workaround for flash memory I/O error	2009-09-11 11:28:00 +10:00
rapidio
regulator	regulator: Voltage count for AB3100	2009-09-17 15:48:24 +02:00
rtc	rtc: add boot_timesource sysfs attribute	2009-09-23 07:39:46 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
sbus	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
scsi	seq_file: constify seq_operations	2009-09-23 07:39:29 -07:00
serial	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
sh
sn
spi	spi: handle TX-only/RX-only	2009-09-23 07:39:44 -07:00
ssb	ssb/sdio: fix printk format warnings	2009-09-16 16:21:00 -04:00
staging	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
tc
telephony
thermal
uio	Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6	2009-09-18 09:43:09 -07:00
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
uwb	trivial: remove unnecessary semicolons	2009-09-21 15:14:58 +02:00
video	spi: prefix modalias with "spi:"	2009-09-23 07:39:43 -07:00
virtio
vlynq	vlynq: includecheck fix: drivers/vlynq/vlynq.c	2009-09-23 07:39:30 -07:00
w1
watchdog	[WATCHDOG] sizeof cleanup	2009-09-18 08:39:37 +00:00
xen	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
zorro
Kconfig
Makefile