linux-stable-rt/include/asm-avr32
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-at32ap [PATCH] gpio_direction_output() needs an initial value 2007-03-16 19:25:04 -07:00
mach
Kbuild [AVR32] Fix typo in include/asm-avr32/Kbuild 2007-03-07 10:50:27 +01:00
a.out.h
addrspace.h
asm.h
atomic.h
auxvec.h
bitops.h
bug.h
bugs.h
byteorder.h
cache.h
cachectl.h
cacheflush.h
checksum.h
cputime.h
current.h
delay.h
device.h
div64.h
dma-mapping.h avr32: dma-mapping.h 2007-03-07 10:50:30 +01:00
dma.h
elf.h
emergency-restart.h
errno.h
fcntl.h
futex.h
gpio.h [AVR32] GPIO API implementation 2007-02-09 15:01:58 +01:00
hardirq.h
hw_irq.h
intc.h
io.h [AVR32] Define ioremap_nocache, ioport_map and ioport_unmap 2007-02-16 12:53:57 +01:00
ioctl.h
ioctls.h
ipcbuf.h
irq.h [AVR32] GPIO API implementation 2007-02-09 15:01:58 +01:00
irq_regs.h
irqflags.h
kdebug.h
kmap_types.h
kprobes.h
linkage.h
local.h
mman.h
mmu.h
mmu_context.h
module.h
msgbuf.h
mutex.h
namei.h
numnodes.h
ocd.h
page.h
param.h
pci.h
percpu.h
pgalloc.h
pgtable-2level.h
pgtable.h
poll.h
posix_types.h [AVR32] ssize_t should be long, not int 2007-02-09 15:01:59 +01:00
processor.h
ptrace.h
resource.h
scatterlist.h
sections.h
semaphore.h
sembuf.h
setup.h
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h
socket.h
sockios.h
stat.h
statfs.h
string.h
sysreg.h
system.h
termbits.h
termios.h [PATCH] consolidate line discipline number definitions 2007-02-11 10:51:26 -08:00
thread_info.h
timex.h
tlb.h
tlbflush.h
topology.h
traps.h
types.h
uaccess.h
ucontext.h
unaligned.h
unistd.h [AVR32] Wire up the SysV IPC calls properly 2007-02-16 12:54:44 +01:00
user.h