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1c0c13eb AJ |
1 | /* |
2 | * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
10 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
12 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
13 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
14 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
15 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
16 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
17 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
18 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
25 | ||
26 | #include <linux/init.h> | |
27 | #include <linux/ssb/ssb.h> | |
28 | #include <asm/time.h> | |
29 | #include <bcm47xx.h> | |
30 | ||
4b550488 | 31 | void __init plat_time_init(void) |
1c0c13eb AJ |
32 | { |
33 | unsigned long hz; | |
34 | ||
35 | /* | |
36 | * Use deterministic values for initial counter interrupt | |
37 | * so that calibrate delay avoids encountering a counter wrap. | |
38 | */ | |
39 | write_c0_count(0); | |
40 | write_c0_compare(0xffff); | |
41 | ||
42 | hz = ssb_cpu_clock(&ssb_bcm47xx.mipscore) / 2; | |
43 | if (!hz) | |
44 | hz = 100000000; | |
45 | ||
46 | /* Set MIPS counter frequency for fixed_rate_gettimeoffset() */ | |
47 | mips_hpt_frequency = hz; | |
48 | } | |
49 | ||
50 | void __init | |
51 | plat_timer_setup(struct irqaction *irq) | |
52 | { | |
53 | /* Enable the timer interrupt */ | |
54 | setup_irq(7, irq); | |
55 | } |