arch/arm/plat-samsung/include/plat/pm.h

   1 /* arch/arm/plat-samsung/include/plat/pm.h
   2  *
   3  * Copyright (c) 2004 Simtec Electronics
   4  *      http://armlinux.simtec.co.uk/
   5  *      Written by Ben Dooks, <ben@simtec.co.uk>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 /* s3c_pm_init
  13  *
  14  * called from board at initialisation time to setup the power
  15  * management
  16 */
  17
  18 #include <plat/pm-common.h>
  19
  20 struct device;
  21
  22 #ifdef CONFIG_SAMSUNG_PM
  23
  24 extern __init int s3c_pm_init(void);
  25 extern __init int s3c64xx_pm_init(void);
  26
  27 #else
  28
  29 static inline int s3c_pm_init(void)
  30 {
  31         return 0;
  32 }
  33
  34 static inline int s3c64xx_pm_init(void)
  35 {
  36         return 0;
  37 }
  38 #endif
  39
  40 /* configuration for the IRQ mask over sleep */
  41 extern unsigned long s3c_irqwake_intmask;
  42 extern unsigned long s3c_irqwake_eintmask;
  43
  44 /* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
  45 extern unsigned long s3c_irqwake_intallow;
  46 extern unsigned long s3c_irqwake_eintallow;
  47
  48 /* per-cpu sleep functions */
  49
  50 extern void (*pm_cpu_prep)(void);
  51 extern int (*pm_cpu_sleep)(unsigned long);
  52
  53 /* Flags for PM Control */
  54
  55 extern unsigned long s3c_pm_flags;
  56
  57 /* from sleep.S */
  58
  59 extern int s3c2410_cpu_suspend(unsigned long);
  60
  61 #ifdef CONFIG_SAMSUNG_PM
  62 extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
  63 extern int s3c_irqext_wake(struct irq_data *data, unsigned int state);
  64 extern void s3c_cpu_resume(void);
  65 #else
  66 #define s3c_irq_wake NULL
  67 #define s3c_irqext_wake NULL
  68 #define s3c_cpu_resume NULL
  69 #endif
  70
  71 #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
  72 /**
  73  * s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
  74  * @set: set bits for the state of the LEDs
  75  * @clear: clear bits for the state of the LEDs.
  76  */
  77 extern void s3c_pm_debug_smdkled(u32 set, u32 clear);
  78
  79 #else
  80 static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { }
  81 #endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
  82
  83 /**
  84  * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
  85  *
  86  * Setup all the necessary GPIO pins for waking the system on external
  87  * interrupt.
  88  */
  89 extern void s3c_pm_configure_extint(void);
  90
  91 #ifdef CONFIG_GPIO_SAMSUNG
  92 /**
  93  * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
  94  *
  95  * Restore the state of the GPIO pins after sleep, which may involve ensuring
  96  * that we do not glitch the state of the pins from that the bootloader's
  97  * resume code has done.
  98 */
  99 extern void samsung_pm_restore_gpios(void);
 100
 101 /**
 102  * samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
 103  *
 104  * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
 105  */
 106 extern void samsung_pm_save_gpios(void);
 107 #else
 108 static inline void samsung_pm_restore_gpios(void) {}
 109 static inline void samsung_pm_save_gpios(void) {}
 110 #endif
 111
 112 extern void s3c_pm_save_core(void);
 113 extern void s3c_pm_restore_core(void);