// SPDX-License-Identifier: GPL-2.0 #include <linux/platform_device.h> #include <linux/err.h> #include <linux/init.h> static __init int add_pcspkr(void) { struct platform_device *pd; pd = platform_device_register_simple("pcspkr", -1, NULL, 0); return PTR_ERR_OR_ZERO(pd); } device_initcall