1 /*
2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
4 *
5 * This program is free software; you can distribute it and/or modify it
6 * under the terms of the GNU General Public License (Version 2) as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
17 *
18 * Setting up the clock on the MIPS boards.
19 */
20
21 #include <linux/init.h>
22 #include <linux/time.h>
23 #include <linux/err.h>
24 #include <linux/clk.h>
25
26 #include <asm/time.h>
27 #include <asm/mach-ar7/ar7.h>
28
plat_time_init(void)29 void __init plat_time_init(void)
30 {
31 struct clk *cpu_clk;
32
33 /* Initialize ar7 clocks so the CPU clock frequency is correct */
34 ar7_init_clocks();
35
36 cpu_clk = clk_get(NULL, "cpu");
37 if (IS_ERR(cpu_clk)) {
38 printk(KERN_ERR "unable to get cpu clock\n");
39 return;
40 }
41
42 mips_hpt_frequency = clk_get_rate(cpu_clk) / 2;
43 }
44