diff options
Diffstat (limited to 'arch/arm/include/asm/cpuidle.h')
-rw-r--r-- | arch/arm/include/asm/cpuidle.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/include/asm/cpuidle.h b/arch/arm/include/asm/cpuidle.h new file mode 100644 index 0000000000..397be5ed30 --- /dev/null +++ b/arch/arm/include/asm/cpuidle.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_ARM_CPUIDLE_H +#define __ASM_ARM_CPUIDLE_H + +#include <asm/proc-fns.h> + +#ifdef CONFIG_CPU_IDLE +extern int arm_cpuidle_simple_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index); +#define __cpuidle_method_section __used __section("__cpuidle_method_of_table") +#else +static inline int arm_cpuidle_simple_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { return -ENODEV; } +#define __cpuidle_method_section __maybe_unused /* drop silently */ +#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,\ + .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) + +struct device_node; + +struct cpuidle_ops { + int (*suspend)(unsigned long arg); + int (*init)(struct device_node *, int cpu); +}; + +struct of_cpuidle_method { + const char *method; + const struct cpuidle_ops *ops; +}; + +#define CPUIDLE_METHOD_OF_DECLARE(name, _method, _ops) \ + static const struct of_cpuidle_method __cpuidle_method_of_table_##name \ + __cpuidle_method_section = { .method = _method, .ops = _ops } + +extern int arm_cpuidle_suspend(int index); + +extern int arm_cpuidle_init(int cpu); + +struct arm_cpuidle_irq_context { }; + +#define arm_cpuidle_save_irq_context(c) (void)c +#define arm_cpuidle_restore_irq_context(c) (void)c + +#endif |