int res,irq_num; 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...
intrequest_threaded_irq(unsigned intirq,irq_handler_thandler,irq_handler_tthread_fn, unsigned longirqflags,const char *devname, void *dev_id) IRQF_SHARED 共享中断时,dev_id不能为空,因为释放irq时要区分哪个共享中断 irq:中断号 handler:发生中断时首先要执行的硬中断处理函数,这个函数可以通过返回 IR...
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 ...
request_threaded_irq 是在将上半部的硬件中断处理缩短为只确定硬体中断来 自我们要处理的装置,唤醒kernel thread 执行后续中断任务。 缺点: 对于非irq 中断的kernel threads ,需要在原本task_struct 新增struct irqaction 多占 4/8 bytes 记忆体空间 linux kernel 2.6.29 之后(2.6.30)加入request_threaded_irq ...
定义一个file_operations结构体(指向Led_Open等底层函数)。使用函数regsiter_chrdev(major,”first_drv”...
[ 72.185484] alt_up_pci_probe() failed with error: -22The status_use_accessors value is 0x10c00, and irq_settings_can_request(), where this value and with _IRQ_NOREQEUST, the result is not zero, so EINVAL returned.This is really puzzled for me. What I am dong wrong ? Attachment ...
__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...
the interrupt request caused by warning:passing argument 2 ' REQUEST_IRQ ' from incompatible pointer type has failed and this article has been transferred from: http://blog.sina.com . cn/s/blog_7321be1101012gek.html Today in...
int ret = request_any_context_irq(irq, my_interrupt_handler,IRQF_TRIGGER_RISING, DEVNAME, NULL, NULL); if (ret != 0) { printk(KERN_INFO "Failed to request IRQ d\n", irq); return ret; } 上述代码请求了中断号为10的中断,并指定了中断处理函数my_interrupt_handler。 3.中断处理函数实现 ...