《Linux驱动》中断

/*以后写驱动可以讲头文件一股脑的加载代码前面*/#include <linux/init.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/fs.h>#include <mach/gpio.h>#include <plat/gpio-cfg.h>#include <linux/miscdevice.h>#include <linux/platform_device.h>#include <mach/regs-gpio.h>#include <asm/io.h>#include <linux/regulator/consumer.h>#include <linux/delay.h>/*中断函数头文件*/#include <linux/interrupt.h>#include <linux/irq.h>#define IRQ_DEBUG#ifdef IRQ_DEBUG#define DPRINTK(x...) printk("IRQ_CTL DEBUG:" x)#else#define DPRINTK(x...)#endif#define DRIVER_NAME "irq_test"static irqreturn_t eint9_interrupt(int irq, void *dev_id) {        printk("%s(%d)\n", __FUNCTION__, __LINE__);        return IRQ_HANDLED;}static irqreturn_t eint10_interrupt(int irq, void *dev_id) {        printk("%s(%d)\n", __FUNCTION__, __LINE__);        return IRQ_HANDLED;}static int irq_probe(struct platform_device *pdev){        int ret;        char *banner = "irq_test Initialize\n";        printk(banner);        ret = gpio_request(EXYNOS4_GPX1(1), "EINT9");        if (ret) {                printk("%s: request GPIO %d for EINT9 failed, ret = %d\n", DRIVER_NAME,                        EXYNOS4_GPX1(1), ret);                return ret;        }        s3c_gpio_cfgpin(EXYNOS4_GPX1(1), S3C_GPIO_SFN(0xF));        s3c_gpio_setpull(EXYNOS4_GPX1(1), S3C_GPIO_PULL_UP);        gpio_free(EXYNOS4_GPX1(1));        ret = gpio_request(EXYNOS4_GPX1(2), "EINT10");        if (ret) {                printk("%s: request GPIO %d for EINT10 failed, ret = %d\n", DRIVER_NAME,                        EXYNOS4_GPX1(2), ret);                return ret;        }        s3c_gpio_cfgpin(EXYNOS4_GPX1(2), S3C_GPIO_SFN(0xF));        s3c_gpio_setpull(EXYNOS4_GPX1(2), S3C_GPIO_PULL_UP);        gpio_free(EXYNOS4_GPX1(2));        /*IRQ_EINT(9)中断向量 开发板芯片原理图引脚上有标记 初学者注意.如果这个驱动模块运行失败，那么查看是否别的驱动占用了你所使用的GPIO*/        ret = request_irq(IRQ_EINT(9), eint9_interrupt,                        IRQ_TYPE_EDGE_FALLING /*IRQF_TRIGGER_FALLING*/, "eint9", pdev);        if (ret < 0) {                printk("Request IRQ %d failed, %d\n", IRQ_EINT(9), ret);                goto exit;        }        ret = request_irq(IRQ_EINT(10), eint10_interrupt,                        IRQ_TYPE_EDGE_FALLING /*IRQF_TRIGGER_FALLING*/, "eint10", pdev);        if (ret < 0) {                printk("Request IRQ %d failed, %d\n", IRQ_EINT(10), ret);                goto exit;        }        return 0;exit:        return ret;}static int irq_remove (struct platform_device *pdev){        free_irq(IRQ_EINT(9),pdev);        free_irq(IRQ_EINT(10),pdev);        return 0;}static int irq_suspend (struct platform_device *pdev, pm_message_t state){        DPRINTK("irq suspend:power off!\n");        return 0;}static int irq_resume (struct platform_device *pdev){        DPRINTK("irq resume:power on!\n");        return 0;}static struct platform_driver irq_driver = {        .probe = irq_probe,        .remove = irq_remove,        .suspend = irq_suspend,        .resume = irq_resume,        .driver = {                .name = DRIVER_NAME,                .owner = THIS_MODULE,        },};static void __exit irq_test_exit(void){        platform_driver_unregister(&irq_driver);}static int __init irq_test_init(void){        return platform_driver_register(&irq_driver);}module_init(irq_test_init);module_exit(irq_test_exit);MODULE_LICENSE("Dual BSD/GPL");