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 | |
Ralf Baechle | 4b55048 | 2007-10-11 23:46:08 +0100 | [diff] [blame] | 31 | void __init plat_time_init(void) |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 32 | { |
Hauke Mehrtens | 08ccf572 | 2011-07-23 01:20:12 +0200 | [diff] [blame] | 33 | unsigned long hz = 0; |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 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 | |
Hauke Mehrtens | 08ccf572 | 2011-07-23 01:20:12 +0200 | [diff] [blame] | 42 | switch (bcm47xx_bus_type) { |
Hauke Mehrtens | a656ffc | 2011-07-23 01:20:13 +0200 | [diff] [blame^] | 43 | #ifdef CONFIG_BCM47XX_SSB |
Hauke Mehrtens | 08ccf572 | 2011-07-23 01:20:12 +0200 | [diff] [blame] | 44 | case BCM47XX_BUS_TYPE_SSB: |
| 45 | hz = ssb_cpu_clock(&bcm47xx_bus.ssb.mipscore) / 2; |
| 46 | break; |
Hauke Mehrtens | a656ffc | 2011-07-23 01:20:13 +0200 | [diff] [blame^] | 47 | #endif |
Hauke Mehrtens | 08ccf572 | 2011-07-23 01:20:12 +0200 | [diff] [blame] | 48 | } |
| 49 | |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 50 | if (!hz) |
| 51 | hz = 100000000; |
| 52 | |
| 53 | /* Set MIPS counter frequency for fixed_rate_gettimeoffset() */ |
| 54 | mips_hpt_frequency = hz; |
| 55 | } |