…）函数，问题一：这里的irq_no可不可以静态的分配？（就是比如我要用98号中断，直接给传98给irq_...
因为中断服务例程都是顺序执行的，在响应一个中断的时候不应该被打断。相反，这些可延时任务执行时，可以...
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”...
printk(KERN_ERR "error %d requesting GPIO IRQ %d\n", status, gpio_num); return status; } set_irq_type(irq, IRQ_TYPE_EDGE_RISING); wait_for_completion_interruptible(&work); printk(".. done\n"); return 0; } void cleanup_module(void) { free_irq(gpio_to_irq(gpio_num), NULL); g...
I am trying to register an ISR with irq number 121 but getting -22 as error. We have a external GPIO controller which is mapped to address space - 0x80040000 and the GPIO pin is connected to external irq0[3:0] in the zynq CPU. here is the code snippet for registering the irq. pr...
But, some error message is shown as below. Can anyone help to understand and debug this? What is pcie_pme? The log says pcie_pme failed, at the end of the log. part of log message is this. imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00 pci_bus 0000:00:...
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 t...
I have implemented a 10G Ethernet Subsystem (v3.0) IP in a custom board. 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 4000000...
printk(KERN_NOTICE "Error %d adding LED%d",err,index); } } int __init light_init(void) { int result; dev_t dev = MKDEV(light_major,0); if(light_major) { result = register_chrdev_region(dev,1,"gpio"); } if(result < 0) ...
Commit e6789cd (uio: Simplify uio error path by using devres functions) converted uio to use devm_request_irq(). This introduced a change in behaviour since the IRQ is associated with the parent device instead of the created UIO device. The IRQ will remain active after uio_unregister_device...