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authorMichael Hennerich <michael.hennerich@analog.com>2007-10-11 00:24:40 +0800
committerBryan Wu <bryan.wu@analog.com>2007-10-11 00:24:40 +0800
commit2acde902301f73e824101e5ca9eb95dc733dc17d (patch)
tree0fc37f01db4c0f761a07d2547da31562e770d1db /arch/blackfin/kernel
parent55249e9e3d07617e00cc6c52b83f7d1a7eb7e64d (diff)
Blackfin arch: a few things still use bfin_read_PORT_FER()
- 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>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 78438d88d22..b58b0de3c90 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -930,6 +930,8 @@ void peripheral_free(unsigned short per)
reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
+ set_label(ident, "free");
+
local_irq_restore(flags);
}
EXPORT_SYMBOL(peripheral_free);
@@ -969,6 +971,17 @@ int gpio_request(unsigned short gpio, const char *label)
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))) {
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio));
@@ -1016,6 +1029,8 @@ void gpio_free(unsigned short gpio)
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
+ set_label(gpio, "free");
+
local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_free);