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path: root/drivers/leds/ledtrig-cpu.c
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Diffstat (limited to 'drivers/leds/ledtrig-cpu.c')
-rw-r--r--drivers/leds/ledtrig-cpu.c142
1 files changed, 0 insertions, 142 deletions
diff --git a/drivers/leds/ledtrig-cpu.c b/drivers/leds/ledtrig-cpu.c
deleted file mode 100644
index 4239b3955ff0..000000000000
--- a/drivers/leds/ledtrig-cpu.c
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * 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/module.h>
-#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 "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
- * binded LED to turn on or turn off.
- */
-void ledtrig_cpu(enum cpu_led_event ledevt)
-{
- struct led_trigger_cpu *trig = &__get_cpu_var(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 __init ledtrig_cpu_init(void)
-{
- int cpu;
-
- /* 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);
-
- pr_info("ledtrig-cpu: registered to indicate activity on CPUs\n");
-
- return 0;
-}
-module_init(ledtrig_cpu_init);
-
-static void __exit ledtrig_cpu_exit(void)
-{
- int cpu;
-
- for_each_possible_cpu(cpu) {
- struct led_trigger_cpu *trig = &per_cpu(cpu_trig, cpu);
-
- led_trigger_unregister_simple(trig->_trig);
- trig->_trig = NULL;
- memset(trig->name, 0, MAX_NAME_LEN);
- }
-
- unregister_syscore_ops(&ledtrig_cpu_syscore_ops);
-}
-module_exit(ledtrig_cpu_exit);
-
-MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
-MODULE_AUTHOR("Bryan Wu <bryan.wu@canonical.com>");
-MODULE_DESCRIPTION("CPU LED trigger");
-MODULE_LICENSE("GPL");