| Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame^] | 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 | |
| 31 | void __init |
| 32 | bcm47xx_time_init(void) |
| 33 | { |
| 34 | unsigned long hz; |
| 35 | |
| 36 | /* |
| 37 | * Use deterministic values for initial counter interrupt |
| 38 | * so that calibrate delay avoids encountering a counter wrap. |
| 39 | */ |
| 40 | write_c0_count(0); |
| 41 | write_c0_compare(0xffff); |
| 42 | |
| 43 | hz = ssb_cpu_clock(&ssb_bcm47xx.mipscore) / 2; |
| 44 | if (!hz) |
| 45 | hz = 100000000; |
| 46 | |
| 47 | /* Set MIPS counter frequency for fixed_rate_gettimeoffset() */ |
| 48 | mips_hpt_frequency = hz; |
| 49 | } |
| 50 | |
| 51 | void __init |
| 52 | plat_timer_setup(struct irqaction *irq) |
| 53 | { |
| 54 | /* Enable the timer interrupt */ |
| 55 | setup_irq(7, irq); |
| 56 | } |