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Commit 13baf88b authored by Bastian Hecht's avatar Bastian Hecht Committed by Simon Horman
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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: default avatarBastian Hecht <hechtb+renesas@gmail.com>
Acked-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 8a21cdae

arch/arm/mach-shmobile/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ obj-$(CONFIG_ARCH_SHMOBILE) += pm-rmobile.o 
obj-$(CONFIG_ARCH_SH7372)	+= pm-sh7372.o sleep-sh7372.o

obj-$(CONFIG_ARCH_R8A7740)	+= pm-r8a7740.o

obj-$(CONFIG_ARCH_R8A7779)	+= pm-r8a7779.o

obj-$(CONFIG_ARCH_SH73A0)	+= pm-sh73a0.o



# Board objects

obj-$(CONFIG_MACH_AP4EVB)	+= board-ap4evb.o

arch/arm/mach-shmobile/board-kzm9g.c

+2 −0
Original line number Diff line number Diff line
@@ -772,6 +772,8 @@ static void __init kzm_init(void) 


	sh73a0_add_standard_devices();

	platform_add_devices(kzm_devices, ARRAY_SIZE(kzm_devices));



	sh73a0_pm_init();

}



static void kzm9g_restart(char mode, const char *cmd)

arch/arm/mach-shmobile/include/mach/common.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ extern void sh73a0_add_early_devices(void); 
extern void sh73a0_add_standard_devices(void);

extern void sh73a0_clock_init(void);

extern void sh73a0_pinmux_init(void);

extern void sh73a0_pm_init(void);

extern struct clk sh73a0_extal1_clk;

extern struct clk sh73a0_extal2_clk;

extern struct clk sh73a0_extcki_clk;

arch/arm/mach-shmobile/pm-sh73a0.c

0 → 100644
+32 −0
Original line number Diff line number Diff line 
/*

 * 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();

}