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ARM: mxs: add initial pm support

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This is a very initial pm support and basically does nothing.
With this pm support entry, drivers can start testing their own
pm functions.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Shawn Guo 2011-01-24 17:05:25 +08:00 committed by Sascha Hauer
parent cf3567aaad
commit 376e9c5848
2 changed files with 44 additions and 0 deletions
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1
arch/arm/mach-mxs/Makefile
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@ -2,6 +2,7 @@
obj-y := clock.o devices.o gpio.o icoll.o iomux.o system.o timer.o
obj-$(CONFIG_MXS_OCOTP) += ocotp.o
obj-$(CONFIG_PM) += pm.o
obj-$(CONFIG_SOC_IMX23) += clock-mx23.o mm-mx23.o
obj-$(CONFIG_SOC_IMX28) += clock-mx28.o mm-mx28.o

43
arch/arm/mach-mxs/pm.c Normal file
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@ -0,0 +1,43 @@
/*
* Copyright (C) 2010 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/suspend.h>
#include <linux/io.h>
#include <mach/system.h>
static int mxs_suspend_enter(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_MEM:
arch_idle();
break;
default:
return -EINVAL;
}
return 0;
}
static struct platform_suspend_ops mxs_suspend_ops = {
.enter = mxs_suspend_enter,
.valid = suspend_valid_only_mem,
};
static int __init mxs_pm_init(void)
{
suspend_set_ops(&mxs_suspend_ops);
return 0;
}
device_initcall(mxs_pm_init);