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
..
arch-aaec2000	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-at91	[PATCH] gpio_direction_output() needs an initial value	2007-03-16 19:25:04 -07:00
arch-cl7500	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-clps711x	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-ebsa110	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-ebsa285	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-ep93xx	[ARM] Merge remaining IOP code	2007-02-20 10:52:43 +00:00
arch-h720x	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-imx	Merge ARM fixes	2007-02-20 19:13:30 +00:00
arch-integrator	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-iop13xx	[ARM] 4187/1: iop: unify time implementation across iop32x, iop33x, and iop13xx	2007-02-17 15:05:40 +00:00
arch-iop32x	[ARM] 4187/1: iop: unify time implementation across iop32x, iop33x, and iop13xx	2007-02-17 15:05:40 +00:00
arch-iop33x	[ARM] 4187/1: iop: unify time implementation across iop32x, iop33x, and iop13xx	2007-02-17 15:05:40 +00:00
arch-ixp4xx	[ARM] 4263/1: fix IXP4XX_NPE[ABC]_BASE_VIRT address	2007-03-12 16:49:38 +00:00
arch-ixp23xx	Merge ARM fixes	2007-02-20 19:13:30 +00:00
arch-ixp2000	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-l7200	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-lh7a40x	[ARM] 4248/1: lh7a40x: fix missing definitions for get_irqnr_preamble	2007-03-08 13:33:57 +00:00
arch-netx	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-ns9xxx	[ARM] 4234/1: Introduce get_irqnr_preamble and arch_ret_to_user for ns9xxx.	2007-02-25 16:41:43 +00:00
arch-omap	[PATCH] gpio_direction_output() needs an initial value	2007-03-16 19:25:04 -07:00
arch-pnx4008	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-pxa	[PATCH] gpio_direction_output() needs an initial value	2007-03-16 19:25:04 -07:00
arch-realview	[ARM] Merge remaining IOP code	2007-02-20 10:52:43 +00:00
arch-rpc	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-s3c2410	[PATCH] gpio_direction_output() needs an initial value	2007-03-16 19:25:04 -07:00
arch-sa1100	[PATCH] gpio_direction_output() needs an initial value	2007-03-16 19:25:04 -07:00
arch-shark	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
arch-versatile	[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user	2007-02-17 15:04:29 +00:00
hardware	[PATCH] gpio_keys driver shouldn't be ARM-specific	2007-03-05 07:57:51 -08:00
mach
plat-s3c24xx	[ARM] 4220/1: S3C24XX: DMA system initialised from sysdev	2007-02-17 15:00:34 +00:00
.gitignore	[ARM] 4216/1: add .gitignore entries for ARM specific files	2007-02-17 11:26:41 +00:00
a.out.h
assembler.h
atomic.h
auxvec.h
bitops.h
bug.h	[ARM] 3983/2: remove unused argument to __bug()	2006-12-07 22:38:09 +00:00
bugs.h
byteorder.h
cache.h
cacheflush.h	[ARM] Convert DMA cache handling to take const void * args	2007-02-08 14:49:44 +00:00
checksum.h	[ARM] Improve csum_fold, cleanup csum_tcpudp_magic()	2007-02-06 16:46:46 +00:00
cnt32_to_63.h	[ARM] 3978/1: macro to provide a 63-bit value from a 32-bit hardware counter	2006-12-07 16:06:45 +00:00
cpu-multi32.h	[ARM] Unuse another Linux PTE bit	2006-12-13 14:34:43 +00:00
cpu-single.h	[ARM] Unuse another Linux PTE bit	2006-12-13 14:34:43 +00:00
cpu.h
cputime.h
current.h
delay.h
device.h	[ARM] Add a reference from struct device to the dma bounce info	2007-02-12 10:28:24 +00:00
div64.h	[ARM] 3611/4: optimize do_div() when divisor is constant	2006-12-07 16:06:09 +00:00
dma-mapping.h	Merge AT91, EP93xx, General devel, PXA, S3C, V6+ and Xscale trees	2007-02-17 20:09:53 +00:00
dma.h
domain.h	[ARM] 4127/1: Flush the prefetch buffer after changing the DACR	2007-02-08 14:49:18 +00:00
dyntick.h
ecard.h
elf.h	[ARM] 4054/1: ep93xx: add HWCAP_CRUNCH	2006-12-18 00:14:54 +00:00
emergency-restart.h
errno.h
fcntl.h
fiq.h
flat.h	[ARM] 4074/1: Flat loader stack alignment	2006-12-30 17:05:08 +00:00
floppy.h
fpstate.h	[ARM] 4111/1: Allow VFP to work with thread migration on SMP	2007-01-25 16:35:29 +00:00
futex.h
glue.h
gpio.h	[PATCH] GPIO core	2007-02-12 09:48:34 -08:00
hardirq.h
hardware.h
hw_irq.h
ide.h
io.h	[PATCH] kill eth_io_copy_and_sum()	2007-02-09 09:14:07 -08:00
ioctl.h
ioctls.h
ipc.h
ipcbuf.h
irq_regs.h
irq.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
irqflags.h
Kbuild
kexec.h	[ARM] 4137/1: Add kexec support	2007-02-16 14:37:06 +00:00
kmap_types.h
leds.h
limits.h
linkage.h
local.h
locks.h
mc146818rtc.h
memory.h
mman.h
mmu_context.h
mmu.h
mmzone.h
module.h
msgbuf.h
mtd-xip.h
mutex.h
namei.h
nwflash.h
page-nommu.h
page.h
param.h
parport.h
pci.h
percpu.h
pgalloc.h
pgtable-hwdef.h
pgtable-nommu.h
pgtable.h	[ARM] 4158/1: Fix user page protection macros	2007-02-11 17:06:17 +00:00
poll.h
posix_types.h
proc-fns.h
processor.h	[ARM] 4016/1: prefetch macro is wrong wrt gcc's "delete-null-pointer-checks"	2006-12-13 18:30:20 +00:00
procinfo.h
ptrace.h
resource.h
rtc.h
scatterlist.h
sections.h
segment.h
semaphore-helper.h
semaphore.h
sembuf.h
serial.h
setup.h	[PATCH] cleanup asm/setup.h userspace visibility	2006-12-07 08:39:46 -08:00
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h
sizes.h
smp.h
socket.h
sockios.h
spinlock_types.h
spinlock.h	[PATCH] Remove the last reference to rwlock_is_locked() macro.	2007-02-11 10:51:34 -08:00
stat.h
statfs.h
string.h
suspend.h
system.h	[ARM] 4241/1: Define mb() as compiler barrier on a uniprocessor system	2007-03-02 11:59:00 +00:00
termbits.h	[PATCH] tty: preparatory structures for termios revamp	2006-12-08 08:28:56 -08:00
termios.h	[PATCH] consolidate line discipline number definitions	2007-02-11 10:51:26 -08:00
therm.h
thread_info.h	[PATCH] PM: Fix SMP races in the freezer	2006-12-13 09:05:49 -08:00
thread_notify.h
timex.h
tlb.h
tlbflush.h	[ARM] 4129/1: Add barriers after the TLB operations	2007-02-08 14:49:27 +00:00
topology.h
traps.h
types.h
uaccess.h	Storage class should be before const qualifier	2007-02-17 20:11:19 +01:00
ucontext.h
unaligned.h
unistd.h	[ARM] 4137/1: Add kexec support	2007-02-16 14:37:06 +00:00
user.h
vfp.h
vfpmacros.h
vga.h
xor.h