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/*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/suspend.h>
static int mx37_suspend_enter(suspend_state_t state)
{
if (tzic_enable_wake(0) != 0)
return -EAGAIN;
switch (state) {
case PM_SUSPEND_MEM:
mxc_cpu_lp_set(STOP_POWER_OFF);
break;
case PM_SUSPEND_STANDBY:
mxc_cpu_lp_set(WAIT_UNCLOCKED_POWER_OFF);
break;
default:
return -EINVAL;
}
cpu_do_idle();
return 0;
}
/*
* Called after processes are frozen, but before we shut down devices.
*/
static int mx37_suspend_prepare(void)
{
return 0;
}
/*
* Called after devices are re-setup, but before processes are thawed.
*/
static void mx37_suspend_finish(void)
{
}
static int mx37_pm_valid(suspend_state_t state)
{
return (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX);
}
struct platform_suspend_ops mx37_suspend_ops = {
.valid = mx37_pm_valid,
.prepare = mx37_suspend_prepare,
.enter = mx37_suspend_enter,
.finish = mx37_suspend_finish,
};
static int __init mx37_pm_init(void)
{
pr_info("Static Power Management for Freescale i.MX37\n");
suspend_set_ops(&mx37_suspend_ops);
return 0;
}
late_initcall(mx37_pm_init);
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