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| author | Bastian Hecht <hechtb@gmail.com> | 2012-12-05 12:13:07 +0000 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-01-25 12:43:46 +0900 |
| commit | 895d3b53fd910f78c52cba89243107fb132538f3 (patch) | |
| tree | 680a247468bd82e90855b3ff2535877261b777aa /arch/arm/mach-shmobile/pm-r8a7740.c | |
| parent | 13baf88bd69ed3cf7e2374eec4a7128f62ae9c1f (diff) | |
| download | op-kernel-dev-895d3b53fd910f78c52cba89243107fb132538f3.zip op-kernel-dev-895d3b53fd910f78c52cba89243107fb132538f3.tar.gz | |
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: Bastian Hecht <hechtb+renesas@gmail.com>
Acked-by: Magnus Damm <damm@opensource.se>
[ horms@verge.net.au: Added missing includes ]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile/pm-r8a7740.c')
| -rw-r--r-- | arch/arm/mach-shmobile/pm-r8a7740.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/pm-r8a7740.c b/arch/arm/mach-shmobile/pm-r8a7740.c index 21e5316d..40b87aa 100644 --- a/arch/arm/mach-shmobile/pm-r8a7740.c +++ b/arch/arm/mach-shmobile/pm-r8a7740.c @@ -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(); +} |
