kernel_optimize_test/drivers/gpio
David Brownell 2f8d11971b gpio: i2c expanders use subsys_init
Make the I2C external GPIO expander drivers register themselves at
subsys_initcall() time when they're statically linked.

SOC-integrated GPIOs are available starting very early -- early in
arch_initcall() at latest, but often even before initcalls start to run --
so this improves consistency, so more subsystems can rely on GPIOs in
their own subsys_initcall() code.

(This isn't a theoretical problem.  This is one of several patches needed
to resolve oopsing observed when statically linking kernels on a DaVinci
EVM.  Its pcf857x GPIOs needed to be available well before some other
drivers initialized.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16 11:21:40 -07:00
..
bt8xxgpio.c gpio: add bt8xxgpio driver 2008-07-25 10:53:30 -07:00
gpiolib.c gpio_free might sleep, generic part 2008-10-16 11:21:40 -07:00
Kconfig gpio: max732x driver 2008-07-25 10:53:30 -07:00
Makefile gpio: max732x driver 2008-07-25 10:53:30 -07:00
max732x.c gpio: i2c expanders use subsys_init 2008-10-16 11:21:40 -07:00
max7301.c gpio: max7301: fix the race between chip addition and pins reconfiguration 2008-10-16 11:21:40 -07:00
mcp23s08.c spi: core and gpio expanders use subsys_init 2008-10-16 11:21:38 -07:00
pca953x.c gpio: i2c expanders use subsys_init 2008-10-16 11:21:40 -07:00
pcf857x.c gpio: i2c expanders use subsys_init 2008-10-16 11:21:40 -07:00