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/cpu_pm.h>
  18 #include <linux/init.h>
  19 #include <linux/io.h>
  20 #include <linux/suspend.h>
  21
  22 #include <asm/cacheflush.h>
  23 #include <asm/proc-fns.h>
  24 #include <asm/suspend.h>
  25
  26 #include "core.h"
  27 #include "sysregs.h"
  28
  29 static int highbank_suspend_finish(unsigned long val)
  30 {
  31         outer_flush_all();
  32         outer_disable();
  33
  34         highbank_set_pwr_suspend();
  35
  36         cpu_do_idle();
  37
  38         highbank_clear_pwr_request();
  39         return 0;
  40 }
  41
  42 static int highbank_pm_enter(suspend_state_t state)
  43 {
  44         cpu_pm_enter();
  45         cpu_cluster_pm_enter();
  46
  47         highbank_set_cpu_jump(0, cpu_resume);
  48         cpu_suspend(0, highbank_suspend_finish);
  49
  50         cpu_cluster_pm_exit();
  51         cpu_pm_exit();
  52
  53         highbank_smc1(0x102, 0x1);
  54         if (scu_base_addr)
  55                 scu_enable(scu_base_addr);
  56         return 0;
  57 }
  58
  59 static const struct platform_suspend_ops highbank_pm_ops = {
  60         .enter = highbank_pm_enter,
  61         .valid = suspend_valid_only_mem,
  62 };
  63
  64 void __init highbank_pm_init(void)
  65 {
  66         suspend_set_ops(&highbank_pm_ops);
  67 }