| /* MN10300 RTC management |
| * |
| * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public Licence |
| * as published by the Free Software Foundation; either version |
| * 2 of the Licence, or (at your option) any later version. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/mc146818rtc.h> |
| #include <linux/ioport.h> |
| #include <linux/platform_device.h> |
| |
| #include <asm/rtc-regs.h> |
| #include <asm/rtc.h> |
| |
| DEFINE_SPINLOCK(rtc_lock); |
| EXPORT_SYMBOL(rtc_lock); |
| |
| static const __initdata struct resource res[] = { |
| DEFINE_RES_IO(RTC_PORT(0), RTC_IO_EXTENT), |
| DEFINE_RES_IRQ(RTC_IRQ), |
| }; |
| |
| /* |
| * calibrate the TSC clock against the RTC |
| */ |
| void __init calibrate_clock(void) |
| { |
| unsigned char status; |
| |
| /* make sure the RTC is running and is set to operate in 24hr mode */ |
| status = RTSRC; |
| RTCRB |= RTCRB_SET; |
| RTCRB |= RTCRB_TM_24HR; |
| RTCRB &= ~RTCRB_DM_BINARY; |
| RTCRA |= RTCRA_DVR; |
| RTCRA &= ~RTCRA_DVR; |
| RTCRB &= ~RTCRB_SET; |
| |
| platform_device_register_simple("rtc_cmos", -1, res, ARRAY_SIZE(res)); |
| } |