AcoSail/kernel_optimize_test
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28735a7253
kernel_optimize_test/drivers
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David Brownell 28735a7253 [PATCH] gpio_direction_output() needs an initial value 
It's been pointed out that output GPIOs should have an initial value, to
avoid signal glitching ...  among other things, it can be some time before
a driver is ready.  This patch corrects that oversight, fixing

 - documentation
 - platforms supporting the GPIO interface
 - users of that call (just one for now, others are pending)

There's only one user of this call for now since most platforms are still
using non-generic GPIO setup code, which in most cases already couples the
initial value with its "set output mode" request.

Note that most platforms are clear about the hardware letting the output
value be set before the pin direction is changed, but the s3c241x docs are
vague on that topic ...  so those chips might not avoid the glitches.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Andrew Victor <andrew@sanpeople.com>
Acked-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:04 -07:00
..
acorn [ARM] Acorn: move the i2c bus driver into drivers/i2c 2007-03-04 20:40:50 +00:00
acpi [PATCH] misc NULL noise 2007-03-14 15:27:49 -07:00
amba
ata [PATCH] trivial ATA iomem annotations 2007-03-14 15:27:50 -07:00
atm [PATCH] zatm __init abuse 2007-03-14 15:27:49 -07:00
auxdisplay [PATCH] cfag12864b: fix crash when built-in and no parport present 2007-02-20 17:10:14 -08:00
base [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 2007-03-15 15:29:26 -07:00
block [PATCH] paride endianness annotations 2007-03-14 15:27:50 -07:00
bluetooth [Bluetooth] Make use of MODULE_FIRMWARE 2007-02-26 11:42:42 -08:00
cdrom [PATCH] Fix soft lockup with iSeries viocd driver 2007-03-05 07:57:51 -08:00
char Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 2007-03-14 15:28:31 -07:00
clocksource [PATCH] clocksource init adjustments (fix bug #7426) 2007-03-05 07:57:53 -08:00
connector [CONNECTOR]: Bugfix for cn_call_callback() 2007-03-07 16:08:08 -08:00
cpufreq Revert "[CPUFREQ] constify cpufreq_driver where possible." 2007-02-26 14:55:48 -08:00
crypto [PATCH] geode-aes: use unsigned long for spin_lock_irqsave 2007-03-06 09:30:25 -08:00
dio
dma [PATCH] rm pointless dmaengine exports 2007-03-16 19:25:03 -07:00
edac
eisa
fc4 [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
firmware
hid Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-03-15 10:50:54 -07:00
hwmon hwmon/vt1211: Add probing of alternate config index port 2007-02-14 21:15:05 +01:00
i2c [ARM] Acorn: move the i2c bus driver into drivers/i2c 2007-03-04 20:40:50 +00:00
ide [PATCH] BLK_DEV_IDE_CELLEB dependency fix 2007-03-14 15:27:49 -07:00
ieee1394 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-02-19 13:29:02 -08:00
infiniband [PATCH] fix ipath_dma_free_coherent() prototype 2007-03-14 15:27:49 -07:00
input Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input 2007-03-08 07:28:30 -08:00
isdn [PATCH] Fix buffer overflow and races in capi debug functions 2007-03-01 14:53:39 -08:00
kvm KVM: Move kvmfs magic number to <linux/magic.h> 2007-03-04 11:12:43 +02:00
leds leds: Add support for Cobalt Server front LED 2007-02-15 21:37:29 +00:00
macintosh backlight: Separate backlight properties from backlight ops pointers 2007-02-20 09:26:53 +00:00
mca
md [PATCH] fix read past end of array in md/linear.c 2007-03-16 19:25:03 -07:00
media [PATCH] misc NULL noise 2007-03-14 15:27:49 -07:00
message [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
mfd [PATCH] drivers/mfd/sm501.c: Replace pci_module_init with pci_register_driver 2007-02-26 12:35:47 -08:00
misc asus-laptop: make code static 2007-03-09 21:06:40 -05:00
mmc [ARM] 4256/1: i.MX/MX1 SDHC fix/workaround of SD card recognition problems 2007-03-12 16:49:37 +00:00
mtd [MTD] [OneNAND] Classify the page data and oob buffer 2007-03-09 08:08:09 +00:00
net natsemi: Avoid IntrStatus lossage if RX state machine resets. 2007-03-15 10:59:54 -04:00
nubus
oprofile [PATCH] mark struct file_operations const 5 2007-02-12 09:48:45 -08:00
parisc Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6 2007-02-26 12:48:06 -08:00
parport [PATCH] parport_pc: fix parport_pc_probe_port section warning 2007-02-20 17:10:16 -08:00
pci [PATCH] pci: Repair pci_save/restore_state so we can restore one save many times. 2007-03-12 16:31:50 -07:00
pcmcia Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
pnp [PATCH] reduce pnp syslog spam 2007-03-16 19:25:02 -07:00
ps3 [PATCH] C99 initializers, proper use of const in drivers/ps3 2007-03-14 15:27:50 -07:00
rapidio [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
rtc [ARM] rtc-pcf8583: Final fixes for this RTC on RiscPC 2007-03-04 20:33:07 +00:00
s390 [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 2007-03-15 15:29:26 -07:00
sbus [SPARC] uctrl: Check request_irq() return value. 2007-02-26 11:35:51 -08:00
scsi [PATCH] sysfs and driver core: add callback helper, used by SCSI and S390 2007-03-15 15:29:26 -07:00
serial [PATCH] 2.6 Altix: console fix for CONFIG_DEBUG_SHIRQ usage 2007-03-08 07:39:15 -08:00
sh
sn
spi [PATCH] gpio_direction_output() needs an initial value 2007-03-16 19:25:04 -07:00
tc [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
telephony [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
usb Revert "USB: pxa2xx_udc: fix hardcoded irq number" 2007-03-10 14:22:07 -08:00
video [PATCH] misc NULL noise 2007-03-14 15:27:49 -07:00
w1
zorro [PATCH] mark struct file_operations const 6 2007-02-12 09:48:45 -08:00
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