| /* 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 |