1 /* MN10300 RTC management
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/mc146818rtc.h>
15 #include <linux/ioport.h>
16 #include <linux/platform_device.h>
18 #include <asm/rtc-regs.h>
21 DEFINE_SPINLOCK(rtc_lock);
22 EXPORT_SYMBOL(rtc_lock);
24 static const __initdata struct resource res[] = {
25 DEFINE_RES_IO(RTC_PORT(0), RTC_IO_EXTENT),
26 DEFINE_RES_IRQ(RTC_IRQ),
30 * calibrate the TSC clock against the RTC
32 void __init calibrate_clock(void)
36 /* make sure the RTC is running and is set to operate in 24hr mode */
39 RTCRB |= RTCRB_TM_24HR;
40 RTCRB &= ~RTCRB_DM_BINARY;
45 platform_device_register_simple("rtc_cmos", -1, res, ARRAY_SIZE(res));