arch/arm/mach-highbank/pm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2011 Calxeda, Inc.
   4  */
   5
   6 #include <linux/cpu_pm.h>
   7 #include <linux/init.h>
   8 #include <linux/psci.h>
   9 #include <linux/suspend.h>
  10
  11 #include <asm/suspend.h>
  12
  13 #include <uapi/linux/psci.h>
  14
  15 #define HIGHBANK_SUSPEND_PARAM \
  16         ((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
  17          (1 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
  18          (PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
  19
  20 static int highbank_suspend_finish(unsigned long val)
  21 {
  22         return psci_ops.cpu_suspend(HIGHBANK_SUSPEND_PARAM, __pa(cpu_resume));
  23 }
  24
  25 static int highbank_pm_enter(suspend_state_t state)
  26 {
  27         cpu_pm_enter();
  28         cpu_cluster_pm_enter();
  29
  30         cpu_suspend(0, highbank_suspend_finish);
  31
  32         cpu_cluster_pm_exit();
  33         cpu_pm_exit();
  34
  35         return 0;
  36 }
  37
  38 static const struct platform_suspend_ops highbank_pm_ops = {
  39         .enter = highbank_pm_enter,
  40         .valid = suspend_valid_only_mem,
  41 };
  42
  43 void __init highbank_pm_init(void)
  44 {
  45         if (!psci_ops.cpu_suspend)
  46                 return;
  47
  48         suspend_set_ops(&highbank_pm_ops);
  49 }