Function rt_led_register

components/drivers/led/led.c:122–194

}

rt_err_t rt_led_register(struct rt_led_device *led)
{
    rt_err_t err;
    int device_id;
    const char *dev_name;
    struct blink_timer *btimer = RT_NULL;

    if (!led || !led->ops)
    {
        return -RT_EINVAL;
    }

    if ((device_id = rt_dm_ida_alloc(&led_ida)) < 0)
    {
        return -RT_EFULL;
    }

    rt_dm_dev_set_name(&led->parent, "led%u", device_id);
    dev_name = rt_dm_dev_get_name(&led->parent);

    led->sysdata = RT_NULL;
    rt_spin_lock_init(&led->spinlock);

    if (!led->ops->set_period && led->ops->set_state)
    {
        btimer = rt_malloc(sizeof(*btimer));

        if (!btimer)
        {
            LOG_E("%s create blink timer failed", dev_name);

            err = -RT_ENOMEM;
            goto _fail;
        }

        led->sysdata = btimer;

        btimer->toggle = RT_FALSE;
        btimer->enabled = RT_FALSE;
        rt_timer_init(&btimer->timer, dev_name, _led_blink_timerout, led,
                rt_tick_from_millisecond(500), RT_TIMER_FLAG_PERIODIC);
    }

    led->parent.type = RT_Device_Class_Char;
#ifdef RT_USING_DEVICE_OPS
    led->parent.ops = &_led_ops;
#else
    led->parent.read = _led_read;
    led->parent.write = _led_write;
#endif
    led->parent.master_id = led_ida.master_id;
    led->parent.device_id = device_id;

    if ((err = rt_device_register(&led->parent, dev_name, RT_DEVICE_FLAG_RDWR)))
    {
        goto _fail;
    }