diff options
| author |   Mike Frysinger <vapier.adi@gmail.com> | 2008-10-28 16:16:29 +0800 |
|---|---|---|
| committer |   Bryan Wu <cooloney@kernel.org> | 2008-10-28 16:16:29 +0800 |
| commit | 6a87d29bc684d845fe8338a8ce279f743d343250 (patch) | |
| tree | c2ea737e052787f940a8a012974213d619d498d2 /arch/blackfin/kernel/bfin_gpio.c | |
| parent | Blackfin arch: unify port_setup() to reduce arch differences (diff) | |
| download | linux-dev-6a87d29bc684d845fe8338a8ce279f743d343250.tar.xz linux-dev-6a87d29bc684d845fe8338a8ce279f743d343250.zip | |
Blackfin arch: refine the gpio check
refine the gpio check in peripheral_request() so that it only
checks pins that can be used as both GPIO and a peripheral
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 96090268e007..3e698d651f17 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -881,13 +881,13 @@ int peripheral_request(unsigned short per, const char *label) if (!(per & P_DEFINED)) return -ENODEV; - if (check_gpio(ident)) - return -EINVAL; - local_irq_save(flags); - /* Can't do GPIO and peripheral at the same time */ - if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { + /* If a pin can be muxed as either GPIO or peripheral, make + * sure it is not already a GPIO pin when we request it. + */ + if (unlikely(!check_gpio(ident) && + reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { dump_stack(); printk(KERN_ERR "%s: Peripheral %d is already reserved as GPIO by %s !\n", |