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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
..
anubis-cpld.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
anubis-irq.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
anubis-map.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
audio.h [ARM] Fix s3c2410 ALSA audio for typedef elimination 2007-02-20 16:11:11 +00:00
bast-cpld.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
bast-irq.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
bast-map.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
bast-pmu.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
debug-macro.S [ARM] 3776/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 2006-09-09 19:44:52 +01:00
dma.h [ARM] 4219/1: S3C2443: DMA source definitions 2007-02-17 15:00:33 +00:00
entry-macro.S [ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user 2007-02-17 15:04:29 +00:00
fb.h [PATCH] s3c2410fb: Add support for STN displays 2006-12-08 08:29:05 -08:00
gpio.h [PATCH] gpio_direction_output() needs an initial value 2007-03-16 19:25:04 -07:00
h1940-latch.h [ARM] 4042/1: H1940: Fix sparse errors from VA addresses 2006-12-17 23:37:53 +00:00
h1940.h [ARM] 3986/1: H1940: suspend to RAM support 2006-12-07 16:17:49 +00:00
hardware.h [ARM] 4073/1: Prevent s3c24xx drivers from including asm/arch/hardware.h and asm/arch/irqs.h 2006-12-30 17:05:07 +00:00
idle.h [ARM] 3776/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 2006-09-09 19:44:52 +01:00
iic.h [ARM] 4038/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (core) 2006-12-17 23:37:48 +00:00
io.h [ARM] 3779/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 [left] 2006-09-09 19:44:57 +01:00
irqs.h [ARM] 4197/1: S3C2443: IRQ number updates 2007-02-16 10:33:36 +00:00
leds-gpio.h [ARM] 4038/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (core) 2006-12-17 23:37:48 +00:00
map.h [ARM] 4045/1: S3C24XX: remove old VA for non-shared areas 2006-12-17 23:37:57 +00:00
memory.h [ARM] 3776/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 2006-09-09 19:44:52 +01:00
nand.h [ARM] 4038/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (core) 2006-12-17 23:37:48 +00:00
osiris-cpld.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
osiris-map.h [ARM] 3846/1: S3C24XX: Fix osiris memory map 2006-09-25 10:33:59 +01:00
otom-map.h
regs-ac97.h [ARM] 3795/1: S3C24XX: add base AC97 registers 2006-09-25 10:25:14 +01:00
regs-adc.h [ARM] 4213/1: S3C2410 - Update definition of ADCTSC_XY_PST 2007-02-17 11:17:38 +00:00
regs-clock.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-dsc.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-gpio.h [ARM] 4194/1: S3C2443: include/asm-arm/arch-s3c2410/regs-gpio.h updates 2007-02-15 15:32:54 +00:00
regs-gpioj.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-iic.h [ARM] 3777/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 [regs-*.h] 2006-09-09 19:44:54 +01:00
regs-iis.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-irq.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-lcd.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-mem.h [ARM] 4106/1: S3C2410: typo fixes in register definitions 2007-01-24 12:04:17 +00:00
regs-nand.h [ARM] 3777/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 [regs-*.h] 2006-09-09 19:44:54 +01:00
regs-power.h [ARM] 3785/1: S3C2412: Fix idle code as default uses wrong clocks 2006-09-14 13:29:15 +01:00
regs-rtc.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-s3c2443-clock.h [ARM] 4205/1: S3C2443: Add cpu specific reset hook 2007-02-16 11:40:51 +00:00
regs-sdi.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-serial.h [ARM] 4195/1: S3C2443: include/asm-arm/arch-s3c2410/regs-serial.h updates 2007-02-15 15:32:56 +00:00
regs-spi.h [ARM] 3777/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 [regs-*.h] 2006-09-09 19:44:54 +01:00
regs-timer.h fix file specification in comments 2006-10-03 23:01:26 +02:00
regs-udc.h [ARM] 4004/1: S3C24XX: UDC remove implict addition of VA to regs 2006-12-08 16:05:53 +00:00
regs-watchdog.h [ARM] 3777/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 [regs-*.h] 2006-09-09 19:44:54 +01:00
reset.h [ARM] 4204/1: S3C24XX: add hook to specify cpu reset 2007-02-16 11:40:50 +00:00
spi-gpio.h fix file specification in comments 2006-10-03 23:01:26 +02:00
spi.h [PATCH] S3C24XX: hardware SPI driver 2006-05-21 12:59:19 -07:00
system.h [ARM] 4204/1: S3C24XX: add hook to specify cpu reset 2007-02-16 11:40:50 +00:00
timex.h [ARM] 4038/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (core) 2006-12-17 23:37:48 +00:00
udc.h [ARM] 4215/1: s3c2410 usb device: per-platform vbus_draw 2007-02-17 11:17:40 +00:00
uncompress.h [ARM] 4049/1: S3C24XX: fix sparse warning due to upf_t in regs-serial.h 2006-12-17 23:38:01 +00:00
usb-control.h [ARM] 4038/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (core) 2006-12-17 23:37:48 +00:00
vmalloc.h [ARM] 3779/1: S3C24XX: remove changelogs from include/asm-arm/arch-s3c2410 [left] 2006-09-09 19:44:57 +01:00
vr1000-cpld.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
vr1000-irq.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00
vr1000-map.h [ARM] 4039/1: S3C24XX: Fix copyrights in include/asm-arm/arch-s3c2410 (mach) 2006-12-17 23:37:49 +00:00