diff options
Diffstat (limited to 'arch/arm/mach-kirkwood/irq.c')
| -rw-r--r-- | arch/arm/mach-kirkwood/irq.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-kirkwood/irq.c b/arch/arm/mach-kirkwood/irq.c new file mode 100644 index 00000000..c4c68e5b --- /dev/null +++ b/arch/arm/mach-kirkwood/irq.c @@ -0,0 +1,48 @@ +/* + * arch/arm/mach-kirkwood/irq.c + * + * Kirkwood IRQ handling. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ +#include <linux/gpio.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <mach/bridge-regs.h> +#include <plat/irq.h> +#include "common.h" + +static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) +{ + BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7); + BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23); + + orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3); +} + +void __init kirkwood_init_irq(void) +{ + orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF)); + orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF)); + + /* + * Initialize gpiolib for GPIOs 0-49. + */ + orion_gpio_init(0, 32, GPIO_LOW_VIRT_BASE, 0, + IRQ_KIRKWOOD_GPIO_START); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler); + + orion_gpio_init(32, 18, GPIO_HIGH_VIRT_BASE, 0, + IRQ_KIRKWOOD_GPIO_START + 32); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler); + irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, + gpio_irq_handler); +} |