B43_LPPHY_RF_PWR_OVERRIDE
b43_phy_maskset(dev, B43_LPPHY_RF_PWR_OVERRIDE, 0xFF00,
old_rf = b43_phy_read(dev, B43_LPPHY_RF_PWR_OVERRIDE) & 0xFF;
b43_phy_maskset(dev, B43_LPPHY_RF_PWR_OVERRIDE, 0xFF00, old_rf);