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/suspend.h> 20 21 #include <asm/suspend.h> 22 #include <asm/psci.h> 23 24 static int highbank_suspend_finish(unsigned long val) 25 { 26 const struct psci_power_state ps = { 27 .type = PSCI_POWER_STATE_TYPE_POWER_DOWN, 28 .affinity_level = 1, 29 }; 30 31 return psci_ops.cpu_suspend(ps, __pa(cpu_resume)); 32 } 33 34 static int highbank_pm_enter(suspend_state_t state) 35 { 36 cpu_pm_enter(); 37 cpu_cluster_pm_enter(); 38 39 cpu_suspend(0, highbank_suspend_finish); 40 41 cpu_cluster_pm_exit(); 42 cpu_pm_exit(); 43 44 return 0; 45 } 46 47 static const struct platform_suspend_ops highbank_pm_ops = { 48 .enter = highbank_pm_enter, 49 .valid = suspend_valid_only_mem, 50 }; 51 52 void __init highbank_pm_init(void) 53 { 54 if (!psci_ops.cpu_suspend) 55 return; 56 57 suspend_set_ops(&highbank_pm_ops); 58 } 59