AD2S1210_REG_EXCIT_FREQ
regmap_reg_range(AD2S1210_REG_EXCIT_FREQ, AD2S1210_REG_CONTROL),
regmap_reg_range(AD2S1210_REG_EXCIT_FREQ, AD2S1210_REG_CONTROL),
ret = regmap_write(st->regmap, AD2S1210_REG_EXCIT_FREQ, fcw);
ret = regmap_read(st->regmap, AD2S1210_REG_EXCIT_FREQ, ®_val);