FMC2_BTR
ret |= regmap_read(ebi->regmap, FMC2_BTR(cs), &ebi->btr[cs]);
regmap_write(ebi->regmap, FMC2_BTR(cs), ebi->btr[cs]);
ret = regmap_read(ebi->regmap, FMC2_BTR(cs), &bxtr);
ret = regmap_read(ebi->regmap, FMC2_BTR(cs), &btr);
ret = regmap_read(ebi->regmap, FMC2_BTR(cs), &btr);
*reg = FMC2_BTR(cs);
regmap_update_bits(ebi->regmap, FMC2_BTR(cs), btr_mask, btr);
ret = regmap_read(ebi->regmap, FMC2_BTR(cs), &bxtr);
regmap_update_bits(ebi->regmap, FMC2_BTR(cs), FMC2_BTR_CLKDIV, val);
regmap_update_bits(ebi->regmap, FMC2_BTR(cs), FMC2_BTR_CLKDIV, val);
regmap_update_bits(ebi->regmap, FMC2_BTR(cs), FMC2_BTR_DATLAT, val);