mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
73c1b41e63
When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
/*
|
|
* ledtrig-cpu.c - LED trigger based on CPU activity
|
|
*
|
|
* This LED trigger will be registered for each possible CPU and named as
|
|
* cpu0, cpu1, cpu2, cpu3, etc.
|
|
*
|
|
* It can be bound to any LED just like other triggers using either a
|
|
* board file or via sysfs interface.
|
|
*
|
|
* An API named ledtrig_cpu is exported for any user, who want to add CPU
|
|
* activity indication in their code
|
|
*
|
|
* Copyright 2011 Linus Walleij <linus.walleij@linaro.org>
|
|
* Copyright 2011 - 2012 Bryan Wu <bryan.wu@canonical.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/cpu.h>
|
|
#include "../leds.h"
|
|
|
|
#define MAX_NAME_LEN 8
|
|
|
|
struct led_trigger_cpu {
|
|
char name[MAX_NAME_LEN];
|
|
struct led_trigger *_trig;
|
|
};
|
|
|
|
static DEFINE_PER_CPU(struct led_trigger_cpu, cpu_trig);
|
|
|
|
/**
|
|
* ledtrig_cpu - emit a CPU event as a trigger
|
|
* @evt: CPU event to be emitted
|
|
*
|
|
* Emit a CPU event on a CPU core, which will trigger a
|
|
* bound LED to turn on or turn off.
|
|
*/
|
|
void ledtrig_cpu(enum cpu_led_event ledevt)
|
|
{
|
|
struct led_trigger_cpu *trig = this_cpu_ptr(&cpu_trig);
|
|
|
|
/* Locate the correct CPU LED */
|
|
switch (ledevt) {
|
|
case CPU_LED_IDLE_END:
|
|
case CPU_LED_START:
|
|
/* Will turn the LED on, max brightness */
|
|
led_trigger_event(trig->_trig, LED_FULL);
|
|
break;
|
|
|
|
case CPU_LED_IDLE_START:
|
|
case CPU_LED_STOP:
|
|
case CPU_LED_HALTED:
|
|
/* Will turn the LED off */
|
|
led_trigger_event(trig->_trig, LED_OFF);
|
|
break;
|
|
|
|
default:
|
|
/* Will leave the LED as it is */
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ledtrig_cpu);
|
|
|
|
static int ledtrig_cpu_syscore_suspend(void)
|
|
{
|
|
ledtrig_cpu(CPU_LED_STOP);
|
|
return 0;
|
|
}
|
|
|
|
static void ledtrig_cpu_syscore_resume(void)
|
|
{
|
|
ledtrig_cpu(CPU_LED_START);
|
|
}
|
|
|
|
static void ledtrig_cpu_syscore_shutdown(void)
|
|
{
|
|
ledtrig_cpu(CPU_LED_HALTED);
|
|
}
|
|
|
|
static struct syscore_ops ledtrig_cpu_syscore_ops = {
|
|
.shutdown = ledtrig_cpu_syscore_shutdown,
|
|
.suspend = ledtrig_cpu_syscore_suspend,
|
|
.resume = ledtrig_cpu_syscore_resume,
|
|
};
|
|
|
|
static int ledtrig_online_cpu(unsigned int cpu)
|
|
{
|
|
ledtrig_cpu(CPU_LED_START);
|
|
return 0;
|
|
}
|
|
|
|
static int ledtrig_prepare_down_cpu(unsigned int cpu)
|
|
{
|
|
ledtrig_cpu(CPU_LED_STOP);
|
|
return 0;
|
|
}
|
|
|
|
static int __init ledtrig_cpu_init(void)
|
|
{
|
|
int cpu;
|
|
int ret;
|
|
|
|
/* Supports up to 9999 cpu cores */
|
|
BUILD_BUG_ON(CONFIG_NR_CPUS > 9999);
|
|
|
|
/*
|
|
* Registering CPU led trigger for each CPU core here
|
|
* ignores CPU hotplug, but after this CPU hotplug works
|
|
* fine with this trigger.
|
|
*/
|
|
for_each_possible_cpu(cpu) {
|
|
struct led_trigger_cpu *trig = &per_cpu(cpu_trig, cpu);
|
|
|
|
snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
|
|
|
|
led_trigger_register_simple(trig->name, &trig->_trig);
|
|
}
|
|
|
|
register_syscore_ops(&ledtrig_cpu_syscore_ops);
|
|
|
|
ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "leds/trigger:starting",
|
|
ledtrig_online_cpu, ledtrig_prepare_down_cpu);
|
|
if (ret < 0)
|
|
pr_err("CPU hotplug notifier for ledtrig-cpu could not be registered: %d\n",
|
|
ret);
|
|
|
|
pr_info("ledtrig-cpu: registered to indicate activity on CPUs\n");
|
|
|
|
return 0;
|
|
}
|
|
device_initcall(ledtrig_cpu_init);
|