arch/arm/mach-s3c/pm.h

   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 #ifdef CONFIG_PM_SLEEP
  52 extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
  53 extern void s3c_cpu_resume(void);
  54 #else
  55 #define s3c_irq_wake NULL
  56 #define s3c_cpu_resume NULL
  57 #endif
  58
  59 #ifdef CONFIG_SAMSUNG_PM
  60 extern int s3c_irqext_wake(struct irq_data *data, unsigned int state);
  61 #else
  62 #define s3c_irqext_wake NULL
  63 #endif
  64
  65 /**
  66  * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
  67  *
  68  * Setup all the necessary GPIO pins for waking the system on external
  69  * interrupt.
  70  */
  71 extern void s3c_pm_configure_extint(void);
  72
  73 #ifdef CONFIG_GPIO_SAMSUNG
  74 /**
  75  * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
  76  *
  77  * Restore the state of the GPIO pins after sleep, which may involve ensuring
  78  * that we do not glitch the state of the pins from that the bootloader's
  79  * resume code has done.
  80 */
  81 extern void samsung_pm_restore_gpios(void);
  82
  83 /**
  84  * samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
  85  *
  86  * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
  87  */
  88 extern void samsung_pm_save_gpios(void);
  89 #else
  90 static inline void samsung_pm_restore_gpios(void) {}
  91 static inline void samsung_pm_save_gpios(void) {}
  92 #endif
  93
  94 extern void s3c_pm_save_core(void);
  95 extern void s3c_pm_restore_core(void);