Driver initialization in linux

If your module names its initialization routine my_init (instead of init_module) and its cleanup routine my_cleanup, you would mark them with the following two lines (usually at the end of the source file): module_init(my_init); module_exit(my_cleanup); Note that your code must include to use module_init and module_exit.  · In Linux if device drivers are built as loadable kernel modules, then upon inserting the device driver kernel module, the kernel calls the init function of the device driver as pointed out by module_init () macro.  · To begin the initialization process, if the e driver is statically linked into the kernel, e_init_module is called by the kernel. However, if the driver is a module, this function is called when the insmod (8) or modprob (8) utilities are run to install the www.doorway.ruted Reading Time: 5 mins.

#include linux/init.h #include linux/module.h static int my_init(void) { return 0; } static void my_exit(void) { return; } module_init(my_init); module_exit(my_exit); The my_init function is the driver initialization entry point and is called during system startup (if the driver is statically compiled into the kernel) or when the module is. Workqueue in Linux Kernel Part 2 – Linux Device Driver Tutorial Part by SLR. This article is a continuation of the Series on Linux Device Driver and carries the discussion on Linux device drivers and their implementation. The aim of this series is to provide easy and practical examples that anyone can understand. Each network driver, implemented as a module, must contain a driver-specific module initialization function, which is called when the kernel loads the network driver module either at boot time or later.

Once a match is discovered, the driver's specific initialization function is called. This function is generally typed __devinit or __init, both of which are. All PEAK drivers are listed (y = included in kernel, m = separate module) but this may not work in every Linux environment. Check: Is the CAN device initialized. By facility, we mean a new functionality, be it a whole driver or a new - Selection from Linux Device Drivers, Second Edition [Book].