Root/arch/mips/jz4740/pm.c

Source at commit 694c7fbe86b8a9c91392e505afcb9fcfc91deccc created 12 years 6 months ago.
By Maarten ter Huurne, MIPS: JZ4740: Add cpufreq support
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
23#include "clock.h"
24
25static int jz4740_pm_enter(suspend_state_t state)
26{
27    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();
38
39    return 0;
40}
41
42static const struct platform_suspend_ops jz4740_pm_ops = {
43    .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);
54

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