1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2004 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Written by Ben Dooks, <ben@simtec.co.uk>
6 */
7
8 /* s3c_pm_init
9 *
10 * called from board at initialisation time to setup the power
11 * management
12 */
13
14 #include "pm-common.h"
15
16 struct device;
17
18 #ifdef CONFIG_SAMSUNG_PM
19
20 extern __init int s3c_pm_init(void);
21 extern __init int s3c64xx_pm_init(void);
22
23 #else
24
25 static inline int s3c_pm_init(void)
26 {
27 return 0;
28 }
29
30 static inline int s3c64xx_pm_init(void)
31 {
32 return 0;
33 }
34 #endif
35
36 /* configuration for the IRQ mask over sleep */
37 extern unsigned long s3c_irqwake_intmask;
38 extern unsigned long s3c_irqwake_eintmask;
39
40 /* per-cpu sleep functions */
41
42 extern void (*pm_cpu_prep)(void);
43 extern int (*pm_cpu_sleep)(unsigned long);
44
45 /* Flags for PM Control */
46
47 extern unsigned long s3c_pm_flags;
48
49 /* from sleep.S */
50
51 extern int s3c2410_cpu_suspend(unsigned long);
52
53 #ifdef CONFIG_PM_SLEEP
54 extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
55 extern void s3c_cpu_resume(void);
56 #else
57 #define s3c_irq_wake NULL
58 #define s3c_cpu_resume NULL
59 #endif
60
61 #ifdef CONFIG_SAMSUNG_PM
62 extern int s3c_irqext_wake(struct irq_data *data, unsigned int state);
63 #else
64 #define s3c_irqext_wake NULL
65 #endif
66
67 /**
68 * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
69 *
70 * Setup all the necessary GPIO pins for waking the system on external
71 * interrupt.
72 */
73 extern void s3c_pm_configure_extint(void);
74
75 #ifdef CONFIG_GPIO_SAMSUNG
76 /**
77 * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
78 *
79 * Restore the state of the GPIO pins after sleep, which may involve ensuring
80 * that we do not glitch the state of the pins from that the bootloader's
81 * resume code has done.
82 */
83 extern void samsung_pm_restore_gpios(void);
84
85 /**
86 * samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
87 *
88 * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
89 */
90 extern void samsung_pm_save_gpios(void);
91 #else
92 static inline void samsung_pm_restore_gpios(void) {}
93 static inline void samsung_pm_save_gpios(void) {}
94 #endif
95
96 extern void s3c_pm_save_core(void);
97 extern void s3c_pm_restore_core(void);
98
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