diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/cpuidle.h | 29 | ||||
| -rw-r--r-- | arch/arm/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/cpuidle.c | 21 |
3 files changed, 51 insertions, 1 deletions
diff --git a/arch/arm/include/asm/cpuidle.h b/arch/arm/include/asm/cpuidle.h new file mode 100644 index 000000000000..2fca60ab513a --- /dev/null +++ b/arch/arm/include/asm/cpuidle.h @@ -0,0 +1,29 @@ +#ifndef __ASM_ARM_CPUIDLE_H +#define __ASM_ARM_CPUIDLE_H + +#ifdef CONFIG_CPU_IDLE +extern int arm_cpuidle_simple_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index); +#else +static inline int arm_cpuidle_simple_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { return -ENODEV; } +#endif + +/* Common ARM WFI state */ +#define ARM_CPUIDLE_WFI_STATE_PWR(p) {\ + .enter = arm_cpuidle_simple_enter,\ + .exit_latency = 1,\ + .target_residency = 1,\ + .power_usage = p,\ + .flags = CPUIDLE_FLAG_TIME_VALID,\ + .name = "WFI",\ + .desc = "ARM WFI",\ +} + +/* + * in case power_specified == 1, give a default WFI power value needed + * by some governors + */ +#define ARM_CPUIDLE_WFI_STATE ARM_CPUIDLE_WFI_STATE_PWR(UINT_MAX) + +#endif diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 43b740d0e374..940c27fde498 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -21,7 +21,7 @@ obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += compat.o obj-$(CONFIG_LEDS) += leds.o obj-$(CONFIG_OC_ETM) += etm.o - +obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_ISA_DMA_API) += dma.o obj-$(CONFIG_ARCH_ACORN) += ecard.o obj-$(CONFIG_FIQ) += fiq.o fiqasm.o diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c new file mode 100644 index 000000000000..89545f6c8403 --- /dev/null +++ b/arch/arm/kernel/cpuidle.c @@ -0,0 +1,21 @@ +/* + * Copyright 2012 Linaro Ltd. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/cpuidle.h> +#include <asm/proc-fns.h> + +int arm_cpuidle_simple_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) +{ + cpu_do_idle(); + + return index; +} |