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linux/arch/arm64/include/asm/cpuidle.h

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arm64: kernel: introduce cpu_init_idle CPU operation The CPUidle subsystem on ARM64 machines requires the idle states implementation back-end to initialize idle states parameter upon boot. This patch adds a hook in the CPU operations structure that should be initialized by the CPU operations back-end in order to provide a function that initializes cpu idle states. This patch also adds the infrastructure to arm64 kernel required to export the CPU operations based initialization interface, so that drivers (ie CPUidle) can use it when they are initialized at probe time. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-07-17 17:30:07 +08:00
#ifndef __ASM_CPUIDLE_H
#define __ASM_CPUIDLE_H
#ifdef CONFIG_CPU_IDLE
extern int cpu_init_idle(unsigned int cpu);
#else
static inline int cpu_init_idle(unsigned int cpu)
{
return -EOPNOTSUPP;
}
#endif
#endif