summaryrefslogtreecommitdiff
path: root/arch/blackfin/kernel
diff options
context:
space:
mode:
authorMichael Hennerich <michael.hennerich@analog.com>2008-04-24 08:10:10 +0800
committerBryan Wu <cooloney@kernel.org>2008-04-24 08:10:10 +0800
commitaffee2b2613ada262eecea354b6c60696ca5d482 (patch)
treebc8b5b7a11416f565635b0b135a4438e17e64230 /arch/blackfin/kernel
parenta086ee2268abcfcbf80a114f4602e5b26aa80bf0 (diff)
[Blackfin] arch: Allow concurrent use of GPIO and GPIO IRQ
The irq setup code no longer calls gpio request and free. This patch also changes the default gpio_free behavior on Blackfin. A freed GPIO keeps it's last state, and is not defaulted back to an input. This is also what all other architectures do. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c45
1 files changed, 17 insertions, 28 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index fcb2f6cf430b..7e8eaf4a31bb 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -395,32 +395,6 @@ inline void portmux_setup(unsigned short portno, unsigned short function)
# define portmux_setup(...) do { } while (0)
#endif
-#ifndef BF548_FAMILY
-static void default_gpio(unsigned gpio)
-{
- unsigned short bank, bitmask;
- unsigned long flags;
-
- bank = gpio_bank(gpio);
- bitmask = gpio_bit(gpio);
-
- local_irq_save(flags);
-
- gpio_bankb[bank]->maska_clear = bitmask;
- gpio_bankb[bank]->maskb_clear = bitmask;
- SSYNC();
- gpio_bankb[bank]->inen &= ~bitmask;
- gpio_bankb[bank]->dir &= ~bitmask;
- gpio_bankb[bank]->polar &= ~bitmask;
- gpio_bankb[bank]->both &= ~bitmask;
- gpio_bankb[bank]->edge &= ~bitmask;
- AWA_DUMMY_READ(edge);
- local_irq_restore(flags);
-}
-#else
-# define default_gpio(...) do { } while (0)
-#endif
-
static int __init bfin_gpio_init(void)
{
printk(KERN_INFO "Blackfin GPIO Controller\n");
@@ -1080,8 +1054,6 @@ void gpio_free(unsigned gpio)
return;
}
- default_gpio(gpio);
-
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
set_label(gpio, "free");
@@ -1144,6 +1116,18 @@ int gpio_get_value(unsigned gpio)
}
EXPORT_SYMBOL(gpio_get_value);
+void bfin_gpio_irq_prepare(unsigned gpio)
+{
+ unsigned long flags;
+
+ port_setup(gpio, GPIO_USAGE);
+
+ local_irq_save(flags);
+ gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
+ gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
+ local_irq_restore(flags);
+}
+
#else
int gpio_direction_input(unsigned gpio)
@@ -1210,6 +1194,11 @@ void bfin_gpio_reset_spi0_ssel1(void)
udelay(1);
}
+void bfin_gpio_irq_prepare(unsigned gpio)
+{
+ port_setup(gpio, GPIO_USAGE);
+}
+
#endif /*BF548_FAMILY */
#if defined(CONFIG_PROC_FS)