acpi_px_to_set
static int acpi_px_to_set(device_t dev, struct acpi_px *px,
acpi_px_to_set(sc->dev,
acpi_px_to_set(dev, &sc->px_states[x], &sets[y]);
acpi_px_to_set(dev, &sc->px_states[sc->px_curr_state], set);
acpi_px_to_set(dev, &sc->px_states[i], set);