ecea4ab6d3
Many of the core ARM kernel files are not modules, but just including module.h for exporting symbols. Now these files can use the lighter footprint export.h for this role. There are probably lots more, but ARM files of mach-* and plat-* don't get coverage via a simple yesconfig build. They will have to be cleaned up and tested via using their respective configs. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
/*
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* LED support code, ripped out of arch/arm/kernel/time.c
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*
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* Copyright (C) 1994-2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/sysdev.h>
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#include <linux/syscore_ops.h>
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#include <linux/string.h>
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#include <asm/leds.h>
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static void dummy_leds_event(led_event_t evt)
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{
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}
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void (*leds_event)(led_event_t) = dummy_leds_event;
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struct leds_evt_name {
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const char name[8];
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int on;
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int off;
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};
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static const struct leds_evt_name evt_names[] = {
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{ "amber", led_amber_on, led_amber_off },
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{ "blue", led_blue_on, led_blue_off },
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{ "green", led_green_on, led_green_off },
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{ "red", led_red_on, led_red_off },
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};
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static ssize_t leds_store(struct sys_device *dev,
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struct sysdev_attribute *attr,
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const char *buf, size_t size)
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{
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int ret = -EINVAL, len = strcspn(buf, " ");
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if (len > 0 && buf[len] == '\0')
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len--;
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if (strncmp(buf, "claim", len) == 0) {
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leds_event(led_claim);
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ret = size;
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} else if (strncmp(buf, "release", len) == 0) {
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leds_event(led_release);
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ret = size;
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} else {
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int i;
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for (i = 0; i < ARRAY_SIZE(evt_names); i++) {
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if (strlen(evt_names[i].name) != len ||
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strncmp(buf, evt_names[i].name, len) != 0)
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continue;
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if (strncmp(buf+len, " on", 3) == 0) {
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leds_event(evt_names[i].on);
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ret = size;
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} else if (strncmp(buf+len, " off", 4) == 0) {
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leds_event(evt_names[i].off);
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ret = size;
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}
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break;
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}
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}
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return ret;
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}
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static SYSDEV_ATTR(event, 0200, NULL, leds_store);
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static struct sysdev_class leds_sysclass = {
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.name = "leds",
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};
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static struct sys_device leds_device = {
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.id = 0,
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.cls = &leds_sysclass,
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};
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static int leds_suspend(void)
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{
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leds_event(led_stop);
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return 0;
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}
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static void leds_resume(void)
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{
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leds_event(led_start);
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}
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static void leds_shutdown(void)
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{
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leds_event(led_halted);
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}
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static struct syscore_ops leds_syscore_ops = {
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.shutdown = leds_shutdown,
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.suspend = leds_suspend,
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.resume = leds_resume,
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};
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static int __init leds_init(void)
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{
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int ret;
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ret = sysdev_class_register(&leds_sysclass);
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if (ret == 0)
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ret = sysdev_register(&leds_device);
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if (ret == 0)
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ret = sysdev_create_file(&leds_device, &attr_event);
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if (ret == 0)
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register_syscore_ops(&leds_syscore_ops);
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return ret;
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}
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device_initcall(leds_init);
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EXPORT_SYMBOL(leds_event);
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