1#include <linux/platform_device.h> 2#include <linux/err.h> 3#include <linux/init.h> 4 5static __init int add_pcspkr(void) 6{ 7 struct platform_device *pd; 8 9 pd = platform_device_register_simple("pcspkr", -1, NULL, 0); 10 11 return IS_ERR(pd) ? PTR_ERR(pd) : 0; 12} 13device_initcall(add_pcspkr); 14