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Blackfin arch: a few things still use bfin_read_PORT_FER()

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- Update gpio_request to allow multiple request with the same signature (label)
 - Use generic GPIO API where applicable
 - Update generic board support form stamp board

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Michael Hennerich 2007-10-11 00:24:40 +08:00 committed by Bryan Wu
parent 55249e9e3d
commit 2acde90230
1 changed files with 15 additions and 0 deletions
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15
arch/blackfin/kernel/bfin_gpio.c
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@ -930,6 +930,8 @@ void peripheral_free(unsigned short per)
reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident); reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
set_label(ident, "free");
local_irq_restore(flags); local_irq_restore(flags);
} }
EXPORT_SYMBOL(peripheral_free); EXPORT_SYMBOL(peripheral_free);
@ -969,6 +971,17 @@ int gpio_request(unsigned short gpio, const char *label)
local_irq_save(flags); local_irq_save(flags);
/*
* Allow that the identical GPIO can
* be requested from the same driver twice
* Do nothing and return -
*/
if (cmp_label(gpio, label) == 0) {
local_irq_restore(flags);
return 0;
}
if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio)); gpio, get_label(gpio));
@ -1016,6 +1029,8 @@ void gpio_free(unsigned short gpio)
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
set_label(gpio, "free");
local_irq_restore(flags); local_irq_restore(flags);
} }
EXPORT_SYMBOL(gpio_free); EXPORT_SYMBOL(gpio_free);