mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
8f1e938db9
After all sysdev classes are ported to regular driver core entities, the sysdev implementation will be entirely removed from the kernel. Cc: Russell King <linux@arm.linux.org.uk> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
122 lines
2.5 KiB
C
122 lines
2.5 KiB
C
/*
|
|
* LED support code, ripped out of arch/arm/kernel/time.c
|
|
*
|
|
* Copyright (C) 1994-2001 Russell King
|
|
*
|
|
* 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/export.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/leds.h>
|
|
|
|
static void dummy_leds_event(led_event_t evt)
|
|
{
|
|
}
|
|
|
|
void (*leds_event)(led_event_t) = dummy_leds_event;
|
|
|
|
struct leds_evt_name {
|
|
const char name[8];
|
|
int on;
|
|
int off;
|
|
};
|
|
|
|
static const struct leds_evt_name evt_names[] = {
|
|
{ "amber", led_amber_on, led_amber_off },
|
|
{ "blue", led_blue_on, led_blue_off },
|
|
{ "green", led_green_on, led_green_off },
|
|
{ "red", led_red_on, led_red_off },
|
|
};
|
|
|
|
static ssize_t leds_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
int ret = -EINVAL, len = strcspn(buf, " ");
|
|
|
|
if (len > 0 && buf[len] == '\0')
|
|
len--;
|
|
|
|
if (strncmp(buf, "claim", len) == 0) {
|
|
leds_event(led_claim);
|
|
ret = size;
|
|
} else if (strncmp(buf, "release", len) == 0) {
|
|
leds_event(led_release);
|
|
ret = size;
|
|
} else {
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(evt_names); i++) {
|
|
if (strlen(evt_names[i].name) != len ||
|
|
strncmp(buf, evt_names[i].name, len) != 0)
|
|
continue;
|
|
if (strncmp(buf+len, " on", 3) == 0) {
|
|
leds_event(evt_names[i].on);
|
|
ret = size;
|
|
} else if (strncmp(buf+len, " off", 4) == 0) {
|
|
leds_event(evt_names[i].off);
|
|
ret = size;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static DEVICE_ATTR(event, 0200, NULL, leds_store);
|
|
|
|
static struct bus_type leds_subsys = {
|
|
.name = "leds",
|
|
.dev_name = "leds",
|
|
};
|
|
|
|
static struct device leds_device = {
|
|
.id = 0,
|
|
.bus = &leds_subsys,
|
|
};
|
|
|
|
static int leds_suspend(void)
|
|
{
|
|
leds_event(led_stop);
|
|
return 0;
|
|
}
|
|
|
|
static void leds_resume(void)
|
|
{
|
|
leds_event(led_start);
|
|
}
|
|
|
|
static void leds_shutdown(void)
|
|
{
|
|
leds_event(led_halted);
|
|
}
|
|
|
|
static struct syscore_ops leds_syscore_ops = {
|
|
.shutdown = leds_shutdown,
|
|
.suspend = leds_suspend,
|
|
.resume = leds_resume,
|
|
};
|
|
|
|
static int __init leds_init(void)
|
|
{
|
|
int ret;
|
|
ret = subsys_system_register(&leds_subsys, NULL);
|
|
if (ret == 0)
|
|
ret = device_register(&leds_device);
|
|
if (ret == 0)
|
|
ret = device_create_file(&leds_device, &dev_attr_event);
|
|
if (ret == 0)
|
|
register_syscore_ops(&leds_syscore_ops);
|
|
return ret;
|
|
}
|
|
|
|
device_initcall(leds_init);
|
|
|
|
EXPORT_SYMBOL(leds_event);
|