kernel_optimize_test/arch/arm/mach-imx/pm-imx25.c
Fabio Estevam 8c4300c227 ARM: mx25: Add basic suspend/resume support
Tested basic suspend/resume on a mx25pdk:

$ echo enabled > /sys/class/tty/ttymxc0/power/wakeup
$ echo mem > /sys/power/state

Then press any key in the serial console and the system wakes up.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-02-14 11:24:18 +08:00

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C

/*
* Copyright 2016 NXP Semiconductors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/suspend.h>
#include <linux/io.h>
static int imx25_suspend_enter(suspend_state_t state)
{
if (!IS_ENABLED(CONFIG_PM))
return 0;
switch (state) {
case PM_SUSPEND_MEM:
cpu_do_idle();
break;
default:
return -EINVAL;
}
return 0;
}
static const struct platform_suspend_ops imx25_suspend_ops = {
.enter = imx25_suspend_enter,
.valid = suspend_valid_only_mem,
};
void __init imx25_pm_init(void)
{
suspend_set_ops(&imx25_suspend_ops);
}