@@ -658,3 +658,49 @@ static ssize_t blkdev_mode_store(struct device *const dev,
static struct device_attribute ledtrig_blkdev_attr_mode =
__ATTR(mode, 0644, blkdev_mode_show, blkdev_mode_store);
+
+
+/*
+ *
+ * Associate an LED with the blkdev trigger
+ *
+ */
+
+static int blkdev_activate(struct led_classdev *const led_dev)
+{
+ struct ledtrig_blkdev_led *led;
+ int ret;
+
+ led = kmalloc(sizeof(*led), GFP_KERNEL);
+ if (led == NULL) {
+ ret = -ENOMEM;
+ goto exit_return;
+ }
+
+ led->led_dev = led_dev;
+ led->blink_msec = LEDTRIG_BLKDEV_BLINK_MSEC;
+ led->mode = LEDTRIG_BLKDEV_MODE_RW;
+ INIT_HLIST_HEAD(&led->disks);
+
+ ret = mutex_lock_interruptible(&ledtrig_blkdev_mutex);
+ if (ret != 0)
+ goto exit_free;
+
+ led->dir = blkdev_mkdir("block_devices", &led_dev->dev->kobj);
+ if (IS_ERR(led->dir)) {
+ ret = PTR_ERR(led->dir);
+ goto exit_unlock;
+ }
+
+ hlist_add_head(&led->leds_node, &ledtrig_blkdev_leds);
+ led_set_trigger_data(led_dev, led);
+ ret = 0;
+
+exit_unlock:
+ mutex_unlock(&ledtrig_blkdev_mutex);
+exit_free:
+ if (ret != 0)
+ kfree(led);
+exit_return:
+ return ret;
+}
Allocate per-LED data structure and initialize with default values Create /sys/class/leds/<led>/block_devices directory Signed-off-by: Ian Pilcher <arequipeno@gmail.com> --- drivers/leds/trigger/ledtrig-blkdev.c | 46 +++++++++++++++++++++++++++ 1 file changed, 46 insertions(+)