Viewing file:  cpuidle.h (1.46 KB) -rw-r--r--
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/* 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);
#endif
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