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Linux/arch/mips/jz4740/pm.c

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  1 /*
  2  *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
  3  *      JZ4740 SoC power management support
  4  *
  5  *  This program is free software; you can redistribute it and/or modify it
  6  *  under  the terms of the GNU General  Public License as published by the
  7  *  Free Software Foundation;  either version 2 of the License, or (at your
  8  *  option) any later version.
  9  *
 10  *  You should have received a copy of the GNU General Public License along
 11  *  with this program; if not, write to the Free Software Foundation, Inc.,
 12  *  675 Mass Ave, Cambridge, MA 02139, USA.
 13  *
 14  */
 15 
 16 #include <linux/init.h>
 17 #include <linux/pm.h>
 18 #include <linux/delay.h>
 19 #include <linux/suspend.h>
 20 
 21 #include <asm/mach-jz4740/clock.h>
 22 
 23 static int jz4740_pm_enter(suspend_state_t state)
 24 {
 25         jz4740_clock_suspend();
 26 
 27         jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_SLEEP);
 28 
 29         __asm__(".set\tmips3\n\t"
 30                 "wait\n\t"
 31                 ".set\tmips0");
 32 
 33         jz4740_clock_set_wait_mode(JZ4740_WAIT_MODE_IDLE);
 34 
 35         jz4740_clock_resume();
 36 
 37         return 0;
 38 }
 39 
 40 static const struct platform_suspend_ops jz4740_pm_ops = {
 41         .valid          = suspend_valid_only_mem,
 42         .enter          = jz4740_pm_enter,
 43 };
 44 
 45 static int __init jz4740_pm_init(void)
 46 {
 47         suspend_set_ops(&jz4740_pm_ops);
 48         return 0;
 49 
 50 }
 51 late_initcall(jz4740_pm_init);
 52 

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