<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Exit function</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="MTD NAND Driver Programming Interface" /><link rel="up" href="ch04.html" title="Chapter 4. Basic board driver" /><link rel="prev" href="ch04s05.html" title="Init function" /><link rel="next" href="ch05.html" title="Chapter 5. Advanced board driver functions" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Exit function</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s05.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Basic board driver</th><td width="20%" align="right"> <a accesskey="n" href="ch05.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Exit function"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Exit_function"></a>Exit function</h2></div></div></div><p> The exit function is only neccecary if the driver is compiled as a module. It releases all resources which are held by the chip driver and unregisters the partitions in the MTD layer. </p><pre class="programlisting"> #ifdef MODULE static void __exit board_cleanup (void) { /* Release resources, unregister device */ nand_release (board_mtd); /* unmap physical address */ iounmap((void *)baseaddr); /* Free the MTD device structure */ kfree (board_mtd); } module_exit(board_cleanup); #endif </pre></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch04s05.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch05.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Init function </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 5. Advanced board driver functions</td></tr></table></div></body></html>