linux dts interrupt

来源：互联网发布：网络犯罪国语版编辑：程序博客网时间：2024/04/30 07:48

http://blog.chinaunix.net/uid-12461657-id-3064012.html

https://community.nxp.com/message/597984

1. dts configuration

arch/arm/boot/dts/imx6sl-evk.dts:

MX6SL_PAD_EPDC_D9__GPIO1_IO16       0x1b0b0

          interrupt-parent = <&gpio1>;          interrupts = <16 2>;

2. c source

#include<linux/kernel.h>#include<linux/types.h>#include<linux/kthread.h>#include<linux/wait.h>#include<linux/string.h>#include<linux/sysctl.h>#include<linux/workqueue.h>#include<linux/interrupt.h>#include<linux/irq.h>#include<linux/device.h>#include<linux/gpio.h>int irq = 176;static int irq_handler(int irq_num, void *dev_id){        printk("interrupt handler function:%d...\n", irq_num);        return IRQ_WAKE_THREAD;}static int irq_thread_fn(int irq_num, void *dev_id){        printk("interrupt thread function:%d...\n", irq_num);        return IRQ_HANDLED;}static int __init request_threaded_irq_init(void){        int result = 0;        printk("gpio_to_irq()=%d\n", gpio_to_irq(16));        result = request_threaded_irq(irq, irq_handler, irq_thread_fn, IRQF_DISABLED,                                                         "irq_test", NULL);        disable_irq(irq);        enable_irq(irq);        return 0;}static void __exit request_threaded_irq_exit(void){        free_irq(irq, NULL);        printk("Goodbye request_threaded_irq\n");        return;}module_init(request_threaded_irq_init);module_exit(request_threaded_irq_exit);MODULE_LICENSE("GPL");

3. result

0 0