1 files changed, 115 insertions, 0 deletions

diff --git a/arch/arm/kernel/leds.c b/arch/arm/kernel/leds.c
new file mode 100644
index 000000000000..31a316c1777b
--- /dev/null
+++ b/arch/arm/kernel/leds.c
@@ -0,0 +1,115 @@
+/*
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/sysdev.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 sys_device *dev,
+                        struct sysdev_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 SYSDEV_ATTR(event, 0200, NULL, leds_store);
+
+static int leds_suspend(struct sys_device *dev, pm_message_t state)
+{
+        leds_event(led_stop);
+        return 0;
+}
+
+static int leds_resume(struct sys_device *dev)
+{
+        leds_event(led_start);
+        return 0;
+}
+
+static int leds_shutdown(struct sys_device *dev)
+{
+        leds_event(led_halted);
+        return 0;
+}
+
+static struct sysdev_class leds_sysclass = {
+        .name           = "leds",
+        .shutdown       = leds_shutdown,
+        .suspend        = leds_suspend,
+        .resume         = leds_resume,
+};
+
+static struct sys_device leds_device = {
+        .id             = 0,
+        .cls            = &leds_sysclass,
+};
+
+static int __init leds_init(void)
+{
+        int ret;
+        ret = sysdev_class_register(&leds_sysclass);
+        if (ret == 0)
+                ret = sysdev_register(&leds_device);
+        if (ret == 0)
+                ret = sysdev_create_file(&leds_device, &attr_event);
+        return ret;
+}
+
+device_initcall(leds_init);
+
+EXPORT_SYMBOL(leds_event);