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-rw-r--r--arch/blackfin/kernel/bfin_gpio.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 9f30948..5d488ef 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -180,11 +180,13 @@ static int cmp_label(unsigned short ident, const char *label)
#ifdef BF537_FAMILY
static void port_setup(unsigned short gpio, unsigned short usage)
{
- if (usage == GPIO_USAGE) {
- *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
- } else
- *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
- SSYNC();
+ if (!check_gpio(gpio)) {
+ if (usage == GPIO_USAGE) {
+ *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
+ } else
+ *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
+ SSYNC();
+ }
}
#else
# define port_setup(...) do { } while (0)
@@ -644,11 +646,10 @@ int peripheral_request(unsigned short per, const char *label)
if (!(per & P_DEFINED))
return -ENODEV;
- if (check_gpio(ident) < 0)
- return -EINVAL;
-
local_irq_save(flags);
+ if (!check_gpio(ident)) {
+
if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
printk(KERN_ERR
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
@@ -658,6 +659,8 @@ int peripheral_request(unsigned short per, const char *label)
return -EBUSY;
}
+ }
+
if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
/*
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