Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * loongson-specific suspend support
4 *
5 * Copyright (C) 2009 Lemote Inc.
6 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
7 */
8#include <linux/suspend.h>
9#include <linux/pm.h>
10
11#include <asm/mipsregs.h>
12
13#include <loongson.h>
14
15asmlinkage void loongson_lefi_sleep(unsigned long sleep_addr);
16
17static int lefi_pm_enter(suspend_state_t state)
18{
19 switch (state) {
20 case PM_SUSPEND_MEM:
21 pm_set_suspend_via_firmware();
22 loongson_lefi_sleep(loongson_sysconf.suspend_addr);
23 pm_set_resume_via_firmware();
24 return 0;
25 default:
26 return -EINVAL;
27 }
28}
29
30static int lefi_pm_valid_state(suspend_state_t state)
31{
32 switch (state) {
33 case PM_SUSPEND_MEM:
34 return !!loongson_sysconf.suspend_addr;
35 default:
36 return 0;
37 }
38}
39
40static const struct platform_suspend_ops lefi_pm_ops = {
41 .valid = lefi_pm_valid_state,
42 .enter = lefi_pm_enter,
43};
44
45static int __init loongson_pm_init(void)
46{
47 if (loongson_sysconf.fw_interface == LOONGSON_LEFI)
48 suspend_set_ops(&lefi_pm_ops);
49
50 return 0;
51}
52arch_initcall(loongson_pm_init);