HMC5843_CONFIG_REG_A
ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &val);
ret = regmap_update_bits(data->regmap, HMC5843_CONFIG_REG_A,
ret = regmap_read(data->regmap, HMC5843_CONFIG_REG_A, &rval);