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arm64: cpuidle: remove generic cpuidle support

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The arm64 support of the generic ARM cpuidle driver was removed. This
let us remove all support code for it.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220529181329.2345722-3-michael@walle.cc
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Michael Walle 2022-05-29 20:13:29 +02:00 committed by Will Deacon
parent 51280acad8
commit 471f80db9e
3 changed files with 0 additions and 53 deletions
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9
arch/arm64/include/asm/cpu_ops.h
View file

@ -31,11 +31,6 @@
* @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the
* cpu being killed.
* @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu.
* @cpu_init_idle: Reads any data necessary to initialize CPU idle states for
* a proposed logical id.
* @cpu_suspend: Suspends a cpu and saves the required context. May fail owing
* to wrong parameters or error conditions. Called from the
* CPU being suspended. Must be called with IRQs disabled.
*/
struct cpu_operations {
const char *name;
@ -49,10 +44,6 @@ struct cpu_operations {
void (*cpu_die)(unsigned int cpu);
int (*cpu_kill)(unsigned int cpu);
#endif
#ifdef CONFIG_CPU_IDLE
int (*cpu_init_idle)(unsigned int);
int (*cpu_suspend)(unsigned long);
#endif
};
int __init init_cpu_ops(int cpu);

15
arch/arm64/include/asm/cpuidle.h
View file

@ -4,21 +4,6 @@
#include <asm/proc-fns.h>
#ifdef CONFIG_CPU_IDLE
extern int arm_cpuidle_init(unsigned int cpu);
extern int arm_cpuidle_suspend(int index);
#else
static inline int arm_cpuidle_init(unsigned int cpu)
{
return -EOPNOTSUPP;
}
static inline int arm_cpuidle_suspend(int index)
{
return -EOPNOTSUPP;
}
#endif
#ifdef CONFIG_ARM64_PSEUDO_NMI
#include <asm/arch_gicv3.h>

29
arch/arm64/kernel/cpuidle.c
View file

@ -13,35 +13,6 @@
#include <linux/of_device.h>
#include <linux/psci.h>
#include <asm/cpuidle.h>
#include <asm/cpu_ops.h>
int arm_cpuidle_init(unsigned int cpu)
{
const struct cpu_operations *ops = get_cpu_ops(cpu);
int ret = -EOPNOTSUPP;
if (ops && ops->cpu_suspend && ops->cpu_init_idle)
ret = ops->cpu_init_idle(cpu);
return ret;
}
/**
* arm_cpuidle_suspend() - function to enter a low-power idle state
* @index: argument to pass to CPU suspend operations
*
* Return: 0 on success, -EOPNOTSUPP if CPU suspend hook not initialized, CPU
* operations back-end error code otherwise.
*/
int arm_cpuidle_suspend(int index)
{
int cpu = smp_processor_id();
const struct cpu_operations *ops = get_cpu_ops(cpu);
return ops->cpu_suspend(index);
}
#ifdef CONFIG_ACPI
#include <acpi/processor.h>