diff options
| author | Michael Hennerich <michael.hennerich@analog.com> | 2008-04-24 02:10:10 +0200 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-04-24 02:10:10 +0200 |
| commit | affee2b2613ada262eecea354b6c60696ca5d482 (patch) | |
| tree | bc8b5b7a11416f565635b0b135a4438e17e64230 /arch/blackfin/kernel | |
| parent | [Blackfin] arch: detect the memory available in the system on the fly by default (diff) | |
| download | linux-affee2b2613ada262eecea354b6c60696ca5d482.tar.xz linux-affee2b2613ada262eecea354b6c60696ca5d482.zip | |
[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.c | 45 |
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) |