projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b920de1b DH |
1 | /* MN10300 RTC management |
| 2 | * | |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 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. | |
| 10 | */ | |
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/mc146818rtc.h> | |
| 5ee98ab3 AB |
15 | #include <linux/ioport.h> |
| 16 | #include <linux/platform_device.h> | |
| 17 | ||
| b920de1b DH |
18 | #include <asm/rtc-regs.h> |
| 19 | #include <asm/rtc.h> | |
| 20 | ||
| 21 | DEFINE_SPINLOCK(rtc_lock); | |
| 22 | EXPORT_SYMBOL(rtc_lock); | |
| 23 | ||
| 5ee98ab3 AB |
24 | static const __initdata struct resource res[] = { |
| 25 | DEFINE_RES_IO(RTC_PORT(0), RTC_IO_EXTENT), | |
| 26 | DEFINE_RES_IRQ(RTC_IRQ), | |
| 27 | }; | |
| b920de1b DH |
28 | |
| 29 | /* | |
| 30 | * calibrate the TSC clock against the RTC | |
| 31 | */ | |
| 32 | void __init calibrate_clock(void) | |
| 33 | { | |
| b920de1b DH |
34 | unsigned char status; |
| 35 | ||
| 36 | /* make sure the RTC is running and is set to operate in 24hr mode */ | |
| 37 | status = RTSRC; | |
| 38 | RTCRB |= RTCRB_SET; | |
| 39 | RTCRB |= RTCRB_TM_24HR; | |
| 368dd5ac | 40 | RTCRB &= ~RTCRB_DM_BINARY; |
| b920de1b DH |
41 | RTCRA |= RTCRA_DVR; |
| 42 | RTCRA &= ~RTCRA_DVR; | |
| 43 | RTCRB &= ~RTCRB_SET; | |
| 5ee98ab3 AB |
44 | |
| 45 | platform_device_register_simple("rtc_cmos", -1, res, ARRAY_SIZE(res)); | |
| b920de1b | 46 | } |