rtc-no.c

来自「ARM 嵌入式 系统 设计与实例开发 实验教材 二源码」· C语言 代码 · 共 31 行

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Stub RTC routines to keep Linux from crashing on machine which don't
 * have a RTC chip.
 *
 * Copyright (C) 1998, 2001 by Ralf Baechle
 */
#include <linux/kernel.h>
#include <linux/mc146818rtc.h>

static unsigned int shouldnt_happen(void)
{
	static int called;

	if (!called) {
		called = 1;
		printk(KERN_DEBUG "RTC functions called - shouldn't happen\n");
	}

	return 0;
}

struct rtc_ops no_rtc_ops = {
    rtc_read_data:  (void *) &shouldnt_happen,
    rtc_write_data: (void *) &shouldnt_happen,
    rtc_bcd_mode:   (void *) &shouldnt_happen
};