REG_CHAN_EN
[REG_CHAN_EN] = REG_FIELD(0x4c, 0, 2),
[REG_CHAN_EN] = REG_FIELD(0x4c, 0, 2),
[REG_CHAN_EN] = REG_FIELD(0x4e, 0, 3),
rc = regmap_field_update_bits(flash_data->r_fields[REG_CHAN_EN], chan_mask, chan_en);