static int parse_bit(DeviceState *dev, Property *prop, const char *str)

{

    if (!strcasecmp(str, "on"))

        bit_prop_set(dev, prop, true);

    else if (!strcasecmp(str, "off"))

        bit_prop_set(dev, prop, false);

    else

        return -EINVAL;

    return 0;

}
