arch/arm/mach-shmobile/suspend.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Suspend-to-RAM support code for SH-Mobile ARM
   4  *
   5  *  Copyright (C) 2011 Magnus Damm
   6  */
   7
   8 #include <linux/pm.h>
   9 #include <linux/suspend.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/cpu.h>
  13
  14 #include <asm/io.h>
  15 #include <asm/system_misc.h>
  16
  17 #include "common.h"
  18
  19 static int shmobile_suspend_default_enter(suspend_state_t suspend_state)
  20 {
  21         cpu_do_idle();
  22         return 0;
  23 }
  24
  25 static int shmobile_suspend_begin(suspend_state_t state)
  26 {
  27         cpu_idle_poll_ctrl(true);
  28         return 0;
  29 }
  30
  31 static void shmobile_suspend_end(void)
  32 {
  33         cpu_idle_poll_ctrl(false);
  34 }
  35
  36 struct platform_suspend_ops shmobile_suspend_ops = {
  37         .begin          = shmobile_suspend_begin,
  38         .end            = shmobile_suspend_end,
  39         .enter          = shmobile_suspend_default_enter,
  40         .valid          = suspend_valid_only_mem,
  41 };
  42
  43 int __init shmobile_suspend_init(void)
  44 {
  45         suspend_set_ops(&shmobile_suspend_ops);
  46         return 0;
  47 }