diff options
| author | Bastian Hecht <hechtb@gmail.com> | 2012-12-05 13:13:06 +0100 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-01-25 04:43:46 +0100 |
| commit | 13baf88bd69ed3cf7e2374eec4a7128f62ae9c1f (patch) | |
| tree | d7c2eb25e8d7717fd2dddc7a1b8045078ed03ff3 /arch/arm | |
| parent | ARM: shmobile: add function declarations for sh7372 DT helper functions (diff) | |
| download | linux-13baf88bd69ed3cf7e2374eec4a7128f62ae9c1f.tar.xz linux-13baf88bd69ed3cf7e2374eec4a7128f62ae9c1f.zip | |
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-shmobile/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/board-kzm9g.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/pm-sh73a0.c | 32 |
4 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index 0b7147928aa3..f6aba6d61d89 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -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 diff --git a/arch/arm/mach-shmobile/board-kzm9g.c b/arch/arm/mach-shmobile/board-kzm9g.c index ac9428530d7b..363c6edfa3cd 100644 --- a/arch/arm/mach-shmobile/board-kzm9g.c +++ b/arch/arm/mach-shmobile/board-kzm9g.c @@ -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) diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h index 2d1686becdd5..f221c116e968 100644 --- a/arch/arm/mach-shmobile/include/mach/common.h +++ b/arch/arm/mach-shmobile/include/mach/common.h @@ -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; diff --git a/arch/arm/mach-shmobile/pm-sh73a0.c b/arch/arm/mach-shmobile/pm-sh73a0.c new file mode 100644 index 000000000000..99086e98fbbc --- /dev/null +++ b/arch/arm/mach-shmobile/pm-sh73a0.c @@ -0,0 +1,32 @@ +/* + * 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(); +} |