RGMII_CFG_OFFSET
regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, gig_en_mask, gig_val);
regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, inband_en_mask, inband_val);
regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, full_duplex_mask,
regmap_read(miig_rt, RGMII_CFG_OFFSET, &val);