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kernel/linux-imx6_3.14.28/arch/arm/mach-highbank/pm.c 1.39 KB
6b13f685e   김민수   BSP 최초 추가
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  /*
   * Copyright 2011 Calxeda, Inc.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  #include <linux/cpu_pm.h>
  #include <linux/init.h>
  #include <linux/suspend.h>
  
  #include <asm/suspend.h>
  #include <asm/psci.h>
  
  static int highbank_suspend_finish(unsigned long val)
  {
  	const struct psci_power_state ps = {
  		.type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
  		.affinity_level = 1,
  	};
  
  	return psci_ops.cpu_suspend(ps, __pa(cpu_resume));
  }
  
  static int highbank_pm_enter(suspend_state_t state)
  {
  	cpu_pm_enter();
  	cpu_cluster_pm_enter();
  
  	cpu_suspend(0, highbank_suspend_finish);
  
  	cpu_cluster_pm_exit();
  	cpu_pm_exit();
  
  	return 0;
  }
  
  static const struct platform_suspend_ops highbank_pm_ops = {
  	.enter = highbank_pm_enter,
  	.valid = suspend_valid_only_mem,
  };
  
  void __init highbank_pm_init(void)
  {
  	if (!psci_ops.cpu_suspend)
  		return;
  
  	suspend_set_ops(&highbank_pm_ops);
  }