diff options
| author |   Herbert Valerio Riedel <hvr@gnu.org> | 2007-11-29 15:19:56 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2008-01-26 15:03:46 +0000 |
| commit | b11e9e020c8c6cdd7e7cc6d5178cce2ad0ac0784 (patch) | |
| tree | 2d419ec2b46f9df5a83f7a6d7cbfde87433341f2 | |
| parent | [ARM] Orion: GPIO support (diff) | |
| download | linux-dev-b11e9e020c8c6cdd7e7cc6d5178cce2ad0ac0784.tar.xz linux-dev-b11e9e020c8c6cdd7e7cc6d5178cce2ad0ac0784.zip | |
[ARM] Orion: provide GPIO method for enabling hardware assisted blinking
This is a pre-requisite for implementing proper hardware accelerated
GPIO LED flashing, and since we want proper locking, it's sensible to provide
the orion specific orion_gpio_set_blink() implementation within
mach-orion/gpio.c. The functions orion_gpio_set_blink() and gpio_set_value()
implicitly turn off each others state.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Acked-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-orion/gpio.c | 19 | ||||
| -rw-r--r-- | include/asm-arm/arch-orion/gpio.h | 1 |
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-orion/gpio.c b/arch/arm/mach-orion/gpio.c index af8553ccd230..0418f5b1ebe7 100644 --- a/arch/arm/mach-orion/gpio.c +++ b/arch/arm/mach-orion/gpio.c @@ -76,6 +76,7 @@ int gpio_direction_output(unsigned pin, int value) gpio_label[pin] = "?"; mask = 1 << pin; + orion_clrbits(GPIO_BLINK_EN, mask); if (value) orion_setbits(GPIO_OUT, mask); else @@ -107,6 +108,7 @@ void gpio_set_value(unsigned pin, int value) spin_lock_irqsave(&gpio_lock, flags); + orion_clrbits(GPIO_BLINK_EN, mask); if (value) orion_setbits(GPIO_OUT, mask); else @@ -116,6 +118,23 @@ void gpio_set_value(unsigned pin, int value) } EXPORT_SYMBOL(gpio_set_value); +void orion_gpio_set_blink(unsigned pin, int blink) +{ + unsigned long flags; + int mask = 1 << pin; + + spin_lock_irqsave(&gpio_lock, flags); + + orion_clrbits(GPIO_OUT, mask); + if (blink) + orion_setbits(GPIO_BLINK_EN, mask); + else + orion_clrbits(GPIO_BLINK_EN, mask); + + spin_unlock_irqrestore(&gpio_lock, flags); +} +EXPORT_SYMBOL(orion_gpio_set_blink); + int gpio_request(unsigned pin, const char *label) { int ret = 0; diff --git a/include/asm-arm/arch-orion/gpio.h b/include/asm-arm/arch-orion/gpio.h index 6d5848ed9a39..d66284f9a14c 100644 --- a/include/asm-arm/arch-orion/gpio.h +++ b/include/asm-arm/arch-orion/gpio.h @@ -12,6 +12,7 @@ extern int gpio_direction_input(unsigned pin); extern int gpio_direction_output(unsigned pin, int value); extern int gpio_get_value(unsigned pin); extern void gpio_set_value(unsigned pin, int value); +extern void orion_gpio_set_blink(unsigned pin, int blink); extern void gpio_display(void); /* debug */ static inline int gpio_to_irq(int pin) |