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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>		18 years ago
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Kconfig	…
Makefile	…
at25.c	…
atmel_spi.c	[PATCH] gpio_direction_output() needs an initial value	18 years ago
atmel_spi.h	…
omap_uwire.c	…
pxa2xx_spi.c	…
spi.c	…
spi_bitbang.c	[PATCH] spi: destroy workqueue after spi_unregister_master	18 years ago
spi_butterfly.c	…
spi_imx.c	…
spi_mpc83xx.c	…
spi_s3c24xx.c	…
spi_s3c24xx_gpio.c	[PATCH] spi_s3c2410_gpio.c spi mode 2 and 3 support	18 years ago