DE0-Nano-SoC: How HPS(ARM) recognizes f2h_irq0 or f2h_irq1 interrupts from FPGA

#include <linux/module.h>

# include <linux/irq.h>

# include <linux/interrupt.h>

# include <linux/kernel.h>

# include <linux/gpio.h>

static int gpio_number = -1;

irqreturn_t gpio_isr(int this_irq, void *dev_id)

{

printk("Interrupt happened at gpio:%d\n", gpio_number);

return IRQ_HANDLED;

}

static void __exit gpio_interrupt_exit (void)

{

free_irq(gpio_to_irq(gpio_number), 0);

return;

}

static int __init gpio_interrupt_init (void)

{

int r;

if (gpio_number < 0) {

printk("Please specify a valid gpio_number\n");

return -1;

}

int irq_number = gpio_to_irq(gpio_number);

r = request_irq(irq_number, gpio_isr, IRQF_DISABLED, 0, 0);

if (r) {

printk("failure requesting irq %i\n", irq_number);

return r;

}

return 0;

}

MODULE_LICENSE("GPL");

module_param(gpio_number, int, 0);

module_init(gpio_interrupt_init);

module_exit(gpio_interrupt_exit);

This example code it´s in the SoC EDS installation folder C:\altera\15.1\embedded\examples\software (For Linux )