diff options
| author | Magnus Damm <damm@opensource.se> | 2011-04-29 02:23:28 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-05-25 11:19:17 +0900 |
| commit | c3dada1894de46139c21352a1000c0fd02d308d5 (patch) | |
| tree | 5486666006f9e377ad0585a4b4b2a0bf656646be /arch/arm | |
| parent | cac6f98dfca51ec2dc906064ba0bf8be4f820ba0 (diff) | |
ARM: mach-shmobile: Suspend-to-RAM support
This patch adds a simple Suspend-to-RAM implementation
for SH-Mobile ARM. The struct shmobile_suspend_ops are
kept global to allow cpu-specific code to override
the callbacks if needed.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-shmobile/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/suspend.c | 47 |
3 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index e2507f66f9d5..a3cad5360a71 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -30,6 +30,9 @@ obj-$(CONFIG_ARCH_SH7377) += entry-intc.o obj-$(CONFIG_ARCH_SH7372) += entry-intc.o obj-$(CONFIG_ARCH_SH73A0) += entry-gic.o +# PM objects +obj-$(CONFIG_SUSPEND) += suspend.o + # Board objects obj-$(CONFIG_MACH_G3EVM) += board-g3evm.o obj-$(CONFIG_MACH_G4EVM) += board-g4evm.o diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h index 013ac0ee8256..39b78bb80e09 100644 --- a/arch/arm/mach-shmobile/include/mach/common.h +++ b/arch/arm/mach-shmobile/include/mach/common.h @@ -8,6 +8,7 @@ struct clk; extern int clk_init(void); extern void shmobile_handle_irq_intc(struct pt_regs *); extern void shmobile_handle_irq_gic(struct pt_regs *); +extern struct platform_suspend_ops shmobile_suspend_ops; extern void sh7367_init_irq(void); extern void sh7367_add_early_devices(void); diff --git a/arch/arm/mach-shmobile/suspend.c b/arch/arm/mach-shmobile/suspend.c new file mode 100644 index 000000000000..c1febe13f709 --- /dev/null +++ b/arch/arm/mach-shmobile/suspend.c @@ -0,0 +1,47 @@ +/* + * Suspend-to-RAM support code for SH-Mobile ARM + * + * Copyright (C) 2011 Magnus Damm + * + * 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/pm.h> +#include <linux/suspend.h> +#include <linux/module.h> +#include <linux/err.h> +#include <asm/system.h> +#include <asm/io.h> + +static int shmobile_suspend_default_enter(suspend_state_t suspend_state) +{ + cpu_do_idle(); + return 0; +} + +static int shmobile_suspend_begin(suspend_state_t state) +{ + disable_hlt(); + return 0; +} + +static void shmobile_suspend_end(void) +{ + enable_hlt(); +} + +struct platform_suspend_ops shmobile_suspend_ops = { + .begin = shmobile_suspend_begin, + .end = shmobile_suspend_end, + .enter = shmobile_suspend_default_enter, + .valid = suspend_valid_only_mem, +}; + +static int __init shmobile_suspend_init(void) +{ + suspend_set_ops(&shmobile_suspend_ops); + return 0; +} +late_initcall(shmobile_suspend_init); |