reinstall device driver

Linux Device Driver Programming-Linux general technology-Linux programming and kernel information-complex device driver-the following is a detailed description. The complex device drivers mentioned here involve PCI, USB, network devices, Block devices, and so on (strictly sp

I. Overview Speaking of writing I2C drivers in Linux, there are currently two main methods: one is to treat I2C devices as a common character device, the other is to use the Linux I2C driver architecture. The two drivers are compared below. The advantages of the first method (corresponding to the disadvantages of the second method) include:● The idea is straightforward and you don't need to take the time to

Transferred from: http://blog.csdn.net/yikai2009/article/details/8653697Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Directory (?) [-] Blocking Blocking operations Non-blocking operation Blocking mode-read-implementation Blocking mode-write-implementation Non-blocking read and write operations Implementation of instance---read blocking Instance---key

Some time ago, I have been engaged in the application software of the GPS navigation system. Recently, it has come to an end. I continue to pick up the driver of the Linux device! The last time I recorded the module initialization code, I checked the code for uninstalling the module this time. Void scull_cleanup_module (void) Let's take a look at scull_trim. /* * Empty out the scull

; cloud_device_sdi};Static void _ init smdk2410_init (void){S3c24xx_fb_set_platdata ( smdk2410_lcdcfg );Platform_add_devices (smdk2410_devices, array_size (smdk2410_devices ));......................}Platform_add_devices/* What does this function do */Bytes -----------------------------------------------------------------------------------For (I = 0; I Ret = platform_device_register (Devs [I]); Platform_device_register/* this function is used to show how to load

I. Linux USB driver levels 1. devices, configurations, interfaces, and endpointsThe logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint. A device usually has one or more configurations: Each USB device provides d

/* 1. Construct a platform-driven struct */Static struct platform_driver s3c2410fb_driver = {. Probe = s3c2410fb_probe,. Driver = {. Name = "s3c2410-lcd ",. Owner = this_module,},}; /* 2. register the driver structure of this platform */Int _ devinit s3c2410fb_init (void){Return platform_driver_register ( s3c2410fb_driver );} What did platform_driver_register do?---------------------------------------------

Access control is sometimes critical for the reliability of a device node. This part of content is only modified on the open and release methods, and some check mechanisms are added. Exclusive Device The most rigid access control method is to allow a device to be opened (exclusive) by a single process at a time, which is the simplest access control for a