linux/arch/arm/mach-shmobile/pm-sh73a0.c
Bastian Hecht 13baf88bd6 ARM: shmobile: sh73a0: Add CPU sleep suspend
Add the lighest possible sleep mode on Cortex-A9 cores: CPU sleep. It is
entered by a simple dsb and wfi instruction via cpu_do_idle(). As just
clocks are stopped there is no need to save or restore any state of the
system.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-01-25 12:43:46 +09:00

33 lines
666 B
C

/*
* sh73a0 Power management support
*
* Copyright (C) 2012 Bastian Hecht <hechtb+renesas@gmail.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/suspend.h>
#include <mach/common.h>
#ifdef CONFIG_SUSPEND
static int sh73a0_enter_suspend(suspend_state_t suspend_state)
{
cpu_do_idle();
return 0;
}
static void sh73a0_suspend_init(void)
{
shmobile_suspend_ops.enter = sh73a0_enter_suspend;
}
#else
static void sh73a0_suspend_init(void) {}
#endif
void __init sh73a0_pm_init(void)
{
sh73a0_suspend_init();
}