e7e463ef3deacb25e7bd983009981a5ef2a1cfbc
[openwrt/svn-archive/archive.git] / target / linux / xburst / files-2.6.32 / arch / mips / jz4740 / pm.c
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 #include <asm/mach-jz4740/regs.h>
21 #include <asm/mach-jz4740/clock.h>
22
23 #include "clock.h"
24
25 extern void jz4740_intc_suspend(void);
26 extern void jz4740_intc_resume(void);
27 extern void jz_gpio_suspend(void);
28 extern void jz_gpio_resume(void);
29
30 static int jz_pm_enter(suspend_state_t state)
31 {
32 jz_gpio_suspend();
33 jz4740_intc_suspend();
34 jz4740_clock_suspend();
35
36 jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_SLEEP);
37
38 __asm__(".set\tmips3\n\t"
39 "wait\n\t"
40 ".set\tmips0");
41
42 jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_IDLE);
43
44 jz4740_clock_resume();
45 jz4740_intc_resume();
46 jz_gpio_resume();
47
48 return 0;
49 }
50
51 static struct platform_suspend_ops jz_pm_ops = {
52 .valid = suspend_valid_only_mem,
53 .enter = jz_pm_enter,
54 };
55
56 /*
57 * Initialize power interface
58 */
59 int __init jz_pm_init(void)
60 {
61 suspend_set_ops(&jz_pm_ops);
62 return 0;
63
64 }
65 late_initcall(jz_pm_init);