diff options
| author | Michael Barkowski <michaelbarkowski@ruggedcom.com> | 2009-08-19 01:20:44 +0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-08-26 06:08:45 +0400 |
| commit | 1dcd8ffc81e80a170625883f63f6a5db3cd0428d (patch) | |
| tree | 8e8f1a34d271a43408745e5eacf868307e85859b /arch/powerpc/sysdev | |
| parent | 9b9d401b8d11796f4c4bcbcabecfec9f5d85ea25 (diff) | |
| download | linux-1dcd8ffc81e80a170625883f63f6a5db3cd0428d.tar.xz | |
powerpc/qe_lib: Set gpio data before changing the direction to output
This avoids having a short glitch if the desired initial value is not
the same as what was previously in the data register.
Signed-off-by: Michael Barkowski <michaelbarkowski@ruggedcom.com>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/qe_lib/gpio.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/gpio.c b/arch/powerpc/sysdev/qe_lib/gpio.c index 3485288dce31..8e7a7767dd5c 100644 --- a/arch/powerpc/sysdev/qe_lib/gpio.c +++ b/arch/powerpc/sysdev/qe_lib/gpio.c @@ -105,14 +105,14 @@ static int qe_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) struct qe_gpio_chip *qe_gc = to_qe_gpio_chip(mm_gc); unsigned long flags; + qe_gpio_set(gc, gpio, val); + spin_lock_irqsave(&qe_gc->lock, flags); __par_io_config_pin(mm_gc->regs, gpio, QE_PIO_DIR_OUT, 0, 0, 0); spin_unlock_irqrestore(&qe_gc->lock, flags); - qe_gpio_set(gc, gpio, val); - return 0; } |