static void rfkill_do_wakeup(struct work_struct *work)
{
    // disable bt wakeup host
    DBG("** free irq\n");
    free_irq(BT_IRQ_WAKE_UP_HOST, NULL);

    DBG("Enable UART_RTS\n");
    gpio_set_value(UART_RTS, GPIO_LOW);
    IOMUX_UART_RTS();
}
static void rfkill_do_wakeup(struct work_struct *work)
{
    DBG("Enable UART_RTS\n");
    gpio_set_value(UART_RTS, GPIO_LOW);
    IOMUX_UART_RTS();
}