1 /*
2 * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
3 * JZ4740 SoC power management support
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * You should have received a copy of the GNU General Public License along
11 * with this program; if not, write to the Free Software Foundation, Inc.,
12 * 675 Mass Ave, Cambridge, MA 02139, USA.
13 *
14 */
15
16 #include <linux/init.h>
17 #include <linux/pm.h>
18 #include <linux/delay.h>
19 #include <linux/suspend.h>
20
21 #include <asm/mach-jz4740/clock.h>
22
jz4740_pm_enter(suspend_state_t state)23 static int jz4740_pm_enter(suspend_state_t state)
24 {
25 jz4740_clock_suspend();
26
27 jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_SLEEP);
28
29 __asm__(".set\tmips3\n\t"
30 "wait\n\t"
31 ".set\tmips0");
32
33 jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_IDLE);
34
35 jz4740_clock_resume();
36
37 return 0;
38 }
39
40 static const struct platform_suspend_ops jz4740_pm_ops = {
41 .valid = suspend_valid_only_mem,
42 .enter = jz4740_pm_enter,
43 };
44
jz4740_pm_init(void)45 static int __init jz4740_pm_init(void)
46 {
47 suspend_set_ops(&jz4740_pm_ops);
48 return 0;
49
50 }
51 late_initcall(jz4740_pm_init);
52