xref: /openbmc/linux/arch/arm/mach-s3c/pm.h (revision 35267cea)
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 #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
68 /**
69  * s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
70  * @set: set bits for the state of the LEDs
71  * @clear: clear bits for the state of the LEDs.
72  */
73 extern void s3c_pm_debug_smdkled(u32 set, u32 clear);
74 
75 #else
76 static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { }
77 #endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
78 
79 /**
80  * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
81  *
82  * Setup all the necessary GPIO pins for waking the system on external
83  * interrupt.
84  */
85 extern void s3c_pm_configure_extint(void);
86 
87 #ifdef CONFIG_GPIO_SAMSUNG
88 /**
89  * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
90  *
91  * Restore the state of the GPIO pins after sleep, which may involve ensuring
92  * that we do not glitch the state of the pins from that the bootloader's
93  * resume code has done.
94 */
95 extern void samsung_pm_restore_gpios(void);
96 
97 /**
98  * samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
99  *
100  * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
101  */
102 extern void samsung_pm_save_gpios(void);
103 #else
104 static inline void samsung_pm_restore_gpios(void) {}
105 static inline void samsung_pm_save_gpios(void) {}
106 #endif
107 
108 extern void s3c_pm_save_core(void);
109 extern void s3c_pm_restore_core(void);
110