arch/arm/mach-highbank/pm.c

   1 /*
   2  * Copyright 2011 Calxeda, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/io.h>
  19 #include <linux/suspend.h>
  20
  21 #include <asm/proc-fns.h>
  22 #include <asm/smp_scu.h>
  23 #include <asm/suspend.h>
  24
  25 #include "core.h"
  26 #include "sysregs.h"
  27
  28 static int highbank_suspend_finish(unsigned long val)
  29 {
  30         cpu_do_idle();
  31         return 0;
  32 }
  33
  34 static int highbank_pm_enter(suspend_state_t state)
  35 {
  36         hignbank_set_pwr_suspend();
  37         highbank_set_cpu_jump(0, cpu_resume);
  38
  39         scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
  40         cpu_suspend(0, highbank_suspend_finish);
  41
  42         return 0;
  43 }
  44
  45 static const struct platform_suspend_ops highbank_pm_ops = {
  46         .enter = highbank_pm_enter,
  47         .valid = suspend_valid_only_mem,
  48 };
  49
  50 static int __init highbank_pm_init(void)
  51 {
  52         suspend_set_ops(&highbank_pm_ops);
  53         return 0;
  54 }
  55 module_init(highbank_pm_init);