Antonio Borneo beb9d007a8 HID: cp2112: fix gpio value in gpio_direction_output ... CP2112 does not offer an atomic method to set both gpio direction and value. Also it does not permit to set gpio value before putting gpio in output. In fact, accordingly to Silicon Labs AN495, Rev. 0.2, cpt. 4.4, the HID report to set gpio values "does not affect any pins that are not configured as outputs". This is confirmed on evaluation board CP2112-EK. With current driver, after execute: echo in > /sys/class/gpio/gpio248/direction echo low > /sys/class/gpio/gpio248/direction gpio output is still high. Only after a following echo low > /sys/class/gpio/gpio248/direction gpio output gets low. Fix driver by changing order of operations; first set direction then set value. The drawback of this new sequence is that we can have a pulse on gpio pin when direction is changed from input to output-low, but this cannot be avoided on current CP2112. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>		2014-07-07 17:07:27 +02:00
..
accessibility
acpi	This is the bulk of pin control changes for the v3.16	2014-06-03 11:20:32 -07:00
amba
ata
atm
auxdisplay
base	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
bcma
block	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 14:00:15 -07:00
bluetooth	TTY/Serial driver patches for 3.16-rc1	2014-06-03 09:01:02 -07:00
bus	ARM: SoC driver changes	2014-06-02 16:35:49 -07:00
cdrom
char	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 14:00:15 -07:00
clk	ARM: SoC driver changes	2014-06-02 16:35:49 -07:00
clocksource	clocksource: versatile: Use sched_clock_register()	2014-06-04 07:46:10 -07:00
connector	Char / misc driver patches for 3.16-rc1	2014-06-03 08:06:56 -07:00
cpufreq	ARM: SoC driver changes	2014-06-02 16:35:49 -07:00
cpuidle	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 14:00:15 -07:00
crypto
dca
devfreq
dio
dma	ARM: SoC driver changes	2014-06-02 16:35:49 -07:00
edac	PCI changes for the v3.16 merge window:	2014-06-02 12:15:19 -07:00
eisa
extcon
firewire	IEEE 1394 (FireWire) subsystem changes:	2014-06-04 07:47:03 -07:00
firmware
fmc
gpio	This is the bulk of GPIO changes for the v3.16 series:	2014-06-02 08:46:03 -07:00
gpu	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
hid	HID: cp2112: fix gpio value in gpio_direction_output	2014-07-07 17:07:27 +02:00
hsi
hv
hwmon	New driver for NCT6683D	2014-06-03 11:09:43 -07:00
hwspinlock
i2c
ide
idle
iio	Staging driver patches for 3.16-rc1	2014-06-03 08:34:00 -07:00
infiniband
input	ARM: SoC updates for 3.16 (part 1)	2014-06-02 16:15:12 -07:00
iommu	Driver core / kernfs pull request for 3.16-rc1	2014-06-03 08:07:41 -07:00
ipack
irqchip	ARM: SoC updates for 3.16 (part 1)	2014-06-02 16:15:12 -07:00
isdn
leds	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid into next	2014-06-04 08:52:36 -07:00
lguest
macintosh
mailbox
mcb
md	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
media	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
memory
memstick
message
mfd	regulator: Updates for v3.16	2014-06-03 11:44:48 -07:00
misc	Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 15:48:23 -07:00
mmc	Updates for mmci driver:	2014-06-02 09:22:24 -07:00
mtd	Merge branch 'for-3.16/core' of git://git.kernel.dk/linux-block into next	2014-06-02 09:29:34 -07:00
net	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
nfc
ntb
nubus
of	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
oprofile
parisc
parport
pci	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
pcmcia
phy
pinctrl	This is the bulk of pin control changes for the v3.16	2014-06-03 11:20:32 -07:00
platform	Staging driver patches for 3.16-rc1	2014-06-03 08:34:00 -07:00
pnp
power	regulator: Updates for v3.16	2014-06-03 11:44:48 -07:00
powercap
pps
ps3
ptp
pwm
rapidio
regulator	regulator: Updates for v3.16	2014-06-03 11:44:48 -07:00
remoteproc
reset	ARM: SoC driver changes	2014-06-02 16:35:49 -07:00
rpmsg
rtc
s390	At over 200 commits, covering almost all supported architectures, this	2014-06-04 08:47:12 -07:00
sbus
scsi	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
sfi
sh
sn
soc
spi	Merge remote-tracking branch 'spi/topic/workqueue' into spi-next	2014-06-02 17:08:43 +01:00
spmi
ssb
staging	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
target	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
tc
thermal
tty	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
uio
usb	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
uwb
vfio
vhost
video	TTY/Serial driver patches for 3.16-rc1	2014-06-03 09:01:02 -07:00
virt
virtio
vlynq
vme
w1	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
watchdog
xen	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
zorro
Kconfig
Makefile	Char / misc driver patches for 3.16-rc1	2014-06-03 08:06:56 -07:00