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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-28 21:39:13 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-28 21:39:13 +0200 |
| commit | 9bafc74163d8bccca9810159aab39be926fb877c (patch) | |
| tree | baa3ba406135247eeb9cdf495448b5db8eea2f0b /arch/arm/plat-mxc/gpio.c | |
| parent | ARM: memblock: setup lowmem mappings using memblock (diff) | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/genesis-2.6 into dev... (diff) | |
| download | linux-9bafc74163d8bccca9810159aab39be926fb877c.tar.xz linux-9bafc74163d8bccca9810159aab39be926fb877c.zip | |
Merge branch 'devel-stable' into devel
Diffstat (limited to 'arch/arm/plat-mxc/gpio.c')
| -rw-r--r-- | arch/arm/plat-mxc/gpio.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c index 9d38da077edb..9c3e36232b5b 100644 --- a/arch/arm/plat-mxc/gpio.c +++ b/arch/arm/plat-mxc/gpio.c @@ -20,6 +20,7 @@ */ #include <linux/init.h> +#include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/gpio.h> @@ -201,11 +202,42 @@ static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc) } } +/* + * Set interrupt number "irq" in the GPIO as a wake-up source. + * While system is running, all registered GPIO interrupts need to have + * wake-up enabled. When system is suspended, only selected GPIO interrupts + * need to have wake-up enabled. + * @param irq interrupt source number + * @param enable enable as wake-up if equal to non-zero + * @return This function returns 0 on success. + */ +static int gpio_set_wake_irq(u32 irq, u32 enable) +{ + u32 gpio = irq_to_gpio(irq); + u32 gpio_idx = gpio & 0x1F; + struct mxc_gpio_port *port = &mxc_gpio_ports[gpio / 32]; + + if (enable) { + if (port->irq_high && (gpio_idx >= 16)) + enable_irq_wake(port->irq_high); + else + enable_irq_wake(port->irq); + } else { + if (port->irq_high && (gpio_idx >= 16)) + disable_irq_wake(port->irq_high); + else + disable_irq_wake(port->irq); + } + + return 0; +} + static struct irq_chip gpio_irq_chip = { .ack = gpio_ack_irq, .mask = gpio_mask_irq, .unmask = gpio_unmask_irq, .set_type = gpio_set_irq_type, + .set_wake = gpio_set_wake_irq, }; static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset, |