1/*
 2 * SH-Mobile Timer
 3 *
 4 * Copyright (C) 2010  Magnus Damm
 5 * Copyright (C) 2002 - 2009  Paul Mundt
 6 *
 7 * This program is free software; you can redistribute it and/or modify
 8 * it under the terms of the GNU General Public License as published by
 9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19 *
20 */
21#include <linux/platform_device.h>
22#include <linux/delay.h>
23#include <asm/mach/time.h>
24#include <asm/smp_twd.h>
25
26void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
27				 unsigned int mult, unsigned int div)
28{
29	/* calculate a worst-case loops-per-jiffy value
30	 * based on maximum cpu core mhz setting and the
31	 * __delay() implementation in arch/arm/lib/delay.S
32	 *
33	 * this will result in a longer delay than expected
34	 * when the cpu core runs on lower frequencies.
35	 */
36
37	unsigned int value = (1000000 * mult) / (HZ * div);
38
39	if (!preset_lpj)
40		preset_lpj = max_cpu_core_mhz * value;
41}
42
43static void __init shmobile_late_time_init(void)
44{
45	/*
46	 * Make sure all compiled-in early timers register themselves.
47	 *
48	 * Run probe() for two "earlytimer" devices, these will be the
49	 * clockevents and clocksource devices respectively. In the event
50	 * that only a clockevents device is available, we -ENODEV on the
51	 * clocksource and the jiffies clocksource is used transparently
52	 * instead. No error handling is necessary here.
53	 */
54	early_platform_driver_register_all("earlytimer");
55	early_platform_driver_probe("earlytimer", 2, 0);
56}
57
58void __init shmobile_earlytimer_init(void)
59{
60	late_time_init = shmobile_late_time_init;
61}
62
63static void __init shmobile_timer_init(void)
64{
 
65}
66
67struct sys_timer shmobile_timer = {
68	.init		= shmobile_timer_init,
69};

 1/*
 2 * SH-Mobile Timer
 3 *
 4 * Copyright (C) 2010  Magnus Damm
 5 * Copyright (C) 2002 - 2009  Paul Mundt
 6 *
 7 * This program is free software; you can redistribute it and/or modify
 8 * it under the terms of the GNU General Public License as published by
 9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19 *
20 */
21#include <linux/platform_device.h>
 
22#include <asm/mach/time.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
23
24static void __init shmobile_late_time_init(void)
25{
26	/*
27	 * Make sure all compiled-in early timers register themselves.
28	 *
29	 * Run probe() for two "earlytimer" devices, these will be the
30	 * clockevents and clocksource devices respectively. In the event
31	 * that only a clockevents device is available, we -ENODEV on the
32	 * clocksource and the jiffies clocksource is used transparently
33	 * instead. No error handling is necessary here.
34	 */
35	early_platform_driver_register_all("earlytimer");
36	early_platform_driver_probe("earlytimer", 2, 0);
37}
38
 
 
 
 
 
39static void __init shmobile_timer_init(void)
40{
41	late_time_init = shmobile_late_time_init;
42}
43
44struct sys_timer shmobile_timer = {
45	.init		= shmobile_timer_init,
46};