irq_num=gpio_to_irq(6); res=request_irq(irq_num,get_state,IRQF_DISABLED,"buttons",(void *)buf); if(res<0) { printk("request irq failed!\n"); return -EIO; } set_irq_type(irq_num, IRQ_TYPE_LEVEL_LOW); Would you please give me some suggestions about how to request irq by gp...
request_irq(gpio_keys_100ask[i].irq, gpio_key_isr, IRQF_TRIGGER_RISING |IRQF_TRIGGER_HIGH, "100ask_gpio_key", &gpio_keys_100ask[i]); 改成这样: request_irq(gpio_keys_100ask[i].irq, gpio_key_isr, IRQF_TRIGGER_RISING |IRQF_TRIGGER_RISING, "100ask_gpio_key", &gpio_keys_100ask[...
I designed the FPGA with Vivado 2015.4, the Linux application with Petalinux 2015.4. Problem : the request_irq() in xilinx_axienet_open() fails with error -22 ... net eth0: axienet_open() xilinx_axienet 40000000.ethernet: request_irq() failed, errno:-22 ... I didn't found applicati...
err = request_threaded_irq(gpio_irq.irq,NULL,gpio_threadhandler,gpio_irq.flags,gpio_irq.name,(void*)0); if(err) { // free_irq(gpio_irq.irq,(void*)0); printk(KERN_DEBUG "request irq failed.\n"); return -EBUSY; } return 0; } int light_release(struct inode *inode,struct file ...
printk(KERN_ERR"Failed to create demo thread\n");returnPTR_ERR(data->thread_task); }//注册中断处理程序和中断线程处理程序ret = request_threaded_irq(DEMO_IRQ_NUMBER, demo_interrupt_handler, demo_threaded_handler, IRQF_SHARED,"demo_interrupt_threaded", (void*)data);if(ret) { ...
__setup_irq是用于设置和注册中断的核心函数,它是request_threaded_irq等函数的内部实现。 1.1. irqaction handler和thread_fn是struct irqaction的两个重要成员,由程序员指定或在__setup_irq中自动设置, 在中断发生后的处理函数被调用。 /// include/linux/interrupt.h /** * struct irqaction - per interrup...
[4413485.998517] R13: 00007ffe316eec1c R14: 00007f3fd06f4220 R15: 00007f3fd06f4220 [4413485.998518] ---[ end trace d98f0aaeb9314192 ]--- [4413485.998530] NVRM: GPU 0000:ca:00.0: request_irq() failed (-4) [4413485.998542] ---[ cut here ]--- [4413485.998543] kernel BUG at...
APP 调用 read 等函数试图读取数据,比如读取按键;APP 进入内核态,也就是调用驱动中的对应函数,发现有...
err = request_threaded_irq(gpio_irq.irq,NULL,gpio_threadhandler,gpio_irq.flags,gpio_irq.name,(void*)0); if(err) { // free_irq(gpio_irq.irq,(void*)0); printk(KERN_DEBUG "request irq failed.\n"); return -EBUSY; } return 0; ...
指向入口函数。 5.出口函数first_drv_exit。卸载驱动unregsiter_chrdev(major,”...