__ad7293_spi_update_bits
ret = __ad7293_spi_update_bits(st, reg, mask, val);
ret = __ad7293_spi_update_bits(st, AD7293_REG_VINX_RANGE1, ch_msk,
ret = __ad7293_spi_update_bits(st, AD7293_REG_VINX_RANGE0, ch_msk,
ret = __ad7293_spi_update_bits(st, AD7293_REG_DAC_EN, BIT(ch), BIT(ch));
return __ad7293_spi_update_bits(st, AD7293_REG_GENERAL,