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Commit 895d3b53 authored by Bastian Hecht's avatar Bastian Hecht Committed by Simon Horman
Browse files

ARM: shmobile: r8a7740: 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>
[ horms@verge.net.au: Added missing includes ]
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 13baf88b

arch/arm/mach-shmobile/board-armadillo800eva.c

+2 −0
Original line number Diff line number Diff line
@@ -1181,6 +1181,8 @@ static void __init eva_init(void) 
	rmobile_add_device_to_domain("A4LC", &hdmi_lcdc_device);

	if (usb)

		rmobile_add_device_to_domain("A3SP", usb);



	r8a7740_pm_init();

}



static void __init eva_earlytimer_init(void)

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

+1 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ extern void r8a7740_add_early_devices(void); 
extern void r8a7740_add_standard_devices(void);

extern void r8a7740_clock_init(u8 md_ck);

extern void r8a7740_pinmux_init(void);

extern void r8a7740_pm_init(void);



extern void r8a7779_init_irq(void);

extern void r8a7779_map_io(void);

arch/arm/mach-shmobile/pm-r8a7740.c

+22 −0
Original line number Diff line number Diff line
@@ -9,7 +9,9 @@ 
 * for more details.

 */

#include <linux/console.h>

#include <linux/suspend.h>

#include <mach/pm-rmobile.h>

#include <mach/common.h>



#ifdef CONFIG_PM

static int r8a7740_pd_a4s_suspend(void)
@@ -58,3 +60,23 @@ void __init r8a7740_init_pm_domains(void) 
}



#endif /* CONFIG_PM */



#ifdef CONFIG_SUSPEND

static int r8a7740_enter_suspend(suspend_state_t suspend_state)

{

	cpu_do_idle();

	return 0;

}



static void r8a7740_suspend_init(void)

{

	shmobile_suspend_ops.enter = r8a7740_enter_suspend;

}

#else

static void r8a7740_suspend_init(void) {}

#endif



void __init r8a7740_pm_init(void)

{

	r8a7740_suspend_init();

}