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kernel/linux-imx6_3.14.28/arch/mips/jz4740/pm.c 1.23 KB
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  /*
   *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
   *	JZ4740 SoC power management support
   *
   *  This program is free software; you can redistribute it and/or modify it
   *  under  the terms of the GNU General	 Public License as published by the
   *  Free Software Foundation;  either version 2 of the License, or (at your
   *  option) any later version.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  675 Mass Ave, Cambridge, MA 02139, USA.
   *
   */
  
  #include <linux/init.h>
  #include <linux/pm.h>
  #include <linux/delay.h>
  #include <linux/suspend.h>
  
  #include <asm/mach-jz4740/clock.h>
  
  #include "clock.h"
  
  static int jz4740_pm_enter(suspend_state_t state)
  {
  	jz4740_clock_suspend();
  
  	jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_SLEEP);
  
  	__asm__(".set\tmips3
  \t"
  		"wait
  \t"
  		".set\tmips0");
  
  	jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_IDLE);
  
  	jz4740_clock_resume();
  
  	return 0;
  }
  
  static const struct platform_suspend_ops jz4740_pm_ops = {
  	.valid		= suspend_valid_only_mem,
  	.enter		= jz4740_pm_enter,
  };
  
  static int __init jz4740_pm_init(void)
  {
  	suspend_set_ops(&jz4740_pm_ops);
  	return 0;
  
  }
  late_initcall(jz4740_pm_init);