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
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at32ap7000.h	[AVR32] Add PIOE device and reserve SDRAM pins	2007-02-09 15:01:58 +01:00
board.h	[AVR32] Use per-controller spi_board_info structures	2007-02-16 14:01:40 +01:00
gpio.h	[PATCH] gpio_direction_output() needs an initial value	2007-03-16 19:25:04 -07:00
init.h	[PATCH] AVR32: Allow renumbering of serial devices	2006-10-04 10:25:06 -07:00
irq.h	[AVR32] Add PIOE device and reserve SDRAM pins	2007-02-09 15:01:58 +01:00
portmux.h	[AVR32] Introduce at32_reserve_pin()	2007-02-09 15:01:58 +01:00
sm.h	[PATCH] avr32 architecture	2006-09-26 08:48:54 -07:00
smc.h	[PATCH] AVR32 MTD: Static Memory Controller driver	2006-09-26 08:48:54 -07:00