blob: 6744fa723f72d19bf024d1a0da16788192300ccf [file] [log] [blame]
Lars-Peter Clausenc863a232010-06-19 04:08:11 +00001/*
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
23#include "clock.h"
Lars-Peter Clausenc863a232010-06-19 04:08:11 +000024
25static int jz4740_pm_enter(suspend_state_t state)
26{
Lars-Peter Clausenc863a232010-06-19 04:08:11 +000027 jz4740_clock_suspend();
28
29 jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_SLEEP);
30
31 __asm__(".set\tmips3\n\t"
32 "wait\n\t"
33 ".set\tmips0");
34
35 jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_IDLE);
36
37 jz4740_clock_resume();
Lars-Peter Clausenc863a232010-06-19 04:08:11 +000038
39 return 0;
40}
41
Lionel Debroux2f55ac02010-11-16 14:14:02 +010042static const struct platform_suspend_ops jz4740_pm_ops = {
Lars-Peter Clausenc863a232010-06-19 04:08:11 +000043 .valid = suspend_valid_only_mem,
44 .enter = jz4740_pm_enter,
45};
46
47static int __init jz4740_pm_init(void)
48{
49 suspend_set_ops(&jz4740_pm_ops);
50 return 0;
51
52}
53late_initcall(jz4740_pm_init);