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
15 asmlinkage void loongson_lefi_sleep(unsigned long sleep_addr);
16
17 static 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
30 static 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
40 static const struct platform_suspend_ops lefi_pm_ops = {
41 .valid = lefi_pm_valid_state,
42 .enter = lefi_pm_enter,
43 };
44
45 static 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 }
52 arch_initcall(loongson_pm_init);
53
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.