xref: /openbmc/linux/include/soc/tegra/pm.h (revision 0d7281b2)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2014 NVIDIA Corporation
4  */
5 
6 #ifndef __SOC_TEGRA_PM_H__
7 #define __SOC_TEGRA_PM_H__
8 
9 #include <linux/errno.h>
10 
11 enum tegra_suspend_mode {
12 	TEGRA_SUSPEND_NONE = 0,
13 	TEGRA_SUSPEND_LP2, /* CPU voltage off */
14 	TEGRA_SUSPEND_LP1, /* CPU voltage off, DRAM self-refresh */
15 	TEGRA_SUSPEND_LP0, /* CPU + core voltage off, DRAM self-refresh */
16 	TEGRA_MAX_SUSPEND_MODE,
17 	TEGRA_SUSPEND_NOT_READY,
18 };
19 
20 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM) && defined(CONFIG_ARCH_TEGRA)
21 enum tegra_suspend_mode
22 tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode);
23 
24 /* low-level resume entry point */
25 void tegra_resume(void);
26 
27 int tegra30_pm_secondary_cpu_suspend(unsigned long arg);
28 void tegra_pm_clear_cpu_in_lp2(void);
29 void tegra_pm_set_cpu_in_lp2(void);
30 int tegra_pm_enter_lp2(void);
31 int tegra_pm_park_secondary_cpu(unsigned long cpu);
32 void tegra_pm_init_suspend(void);
33 #else
34 static inline enum tegra_suspend_mode
tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode)35 tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode)
36 {
37 	return TEGRA_SUSPEND_NONE;
38 }
39 
tegra_resume(void)40 static inline void tegra_resume(void)
41 {
42 }
43 
tegra30_pm_secondary_cpu_suspend(unsigned long arg)44 static inline int tegra30_pm_secondary_cpu_suspend(unsigned long arg)
45 {
46 	return -ENOTSUPP;
47 }
48 
tegra_pm_clear_cpu_in_lp2(void)49 static inline void tegra_pm_clear_cpu_in_lp2(void)
50 {
51 }
52 
tegra_pm_set_cpu_in_lp2(void)53 static inline void tegra_pm_set_cpu_in_lp2(void)
54 {
55 }
56 
tegra_pm_enter_lp2(void)57 static inline int tegra_pm_enter_lp2(void)
58 {
59 	return -ENOTSUPP;
60 }
61 
tegra_pm_park_secondary_cpu(unsigned long cpu)62 static inline int tegra_pm_park_secondary_cpu(unsigned long cpu)
63 {
64 	return -ENOTSUPP;
65 }
66 
tegra_pm_init_suspend(void)67 static inline void tegra_pm_init_suspend(void)
68 {
69 }
70 #endif /* CONFIG_PM_SLEEP */
71 
72 #endif /* __SOC_TEGRA_PM_H__ */
73