REFGEN_REG_BG_CTRL
regmap_update_bits(rdev->regmap, REFGEN_REG_BG_CTRL, REFGEN_BG_CTRL_MASK,
regmap_update_bits(rdev->regmap, REFGEN_REG_BG_CTRL, REFGEN_BG_CTRL_MASK,
regmap_read(rdev->regmap, REFGEN_REG_BG_CTRL, &val);