iio/amplifiers/ada4250.c

85 	struct ada4250_state *st = iio_priv(indio_dev);
91 	if (st->bias == 0 || st->bias == 3)
94 	voltage_v = regulator_get_voltage(st->reg);
97 	if (st->bias == ADA4250_BIAS_AVDD)
107 	if (st->gain == 0)
124 		max_vos = x[st->gain] *  127 * ((1 << (i + 1)) - 1);
128 			vlsb = x[st->gain] * ((1 << (i + 1)) - 1);
138 	mutex_lock(&st->lock);
139 	ret = regmap_update_bits(st->regmap, ADA4250_REG_SNSR_CAL_CNFG,
145 	st->offset_uv = offset_raw * vlsb;
154 		st->offset_uv *= (-1);
157 	ret = regmap_write(st->regmap, ADA4250_REG_SNSR_CAL_VAL, offset_raw);
160 	mutex_unlock(&st->lock);
169 	struct ada4250_state *st = iio_priv(indio_dev);
174 		ret = regmap_read(st->regmap, ADA4250_REG_GAIN_MUX, val);
182 		*val = st->offset_uv;
186 		ret = regmap_read(st->regmap, ADA4250_REG_SNSR_CAL_CNFG, val);
207 	struct ada4250_state *st = iio_priv(indio_dev);
212 		ret = regmap_write(st->regmap, ADA4250_REG_GAIN_MUX,
217 		st->gain = ilog2(val);
223 		ret = regmap_update_bits(st->regmap, ADA4250_REG_SNSR_CAL_CNFG,
229 		st->bias = val;
265 	struct ada4250_state *st = iio_priv(indio_dev);
268 		return regmap_read(st->regmap, reg, read_val);
270 		return regmap_write(st->regmap, reg, write_val);
300 static int ada4250_init(struct ada4250_state *st)
305 	struct spi_device *spi = st->spi;
307 	st->refbuf_en = device_property_read_bool(&spi->dev, "adi,refbuf-enable");
309 	st->reg = devm_regulator_get(&spi->dev, "avdd");
310 	if (IS_ERR(st->reg))
311 		return dev_err_probe(&spi->dev, PTR_ERR(st->reg),
314 	ret = regulator_enable(st->reg);
320 	ret = devm_add_action_or_reset(&spi->dev, ada4250_reg_disable, st->reg);
324 	ret = regmap_write(st->regmap, ADA4250_REG_RESET,
329 	ret = regmap_bulk_read(st->regmap, ADA4250_REG_CHIP_ID, data, 2);
340 	return regmap_write(st->regmap, ADA4250_REG_REFBUF_EN,
341 			    FIELD_PREP(ADA4250_REFBUF_MSK, st->refbuf_en));
348 	struct ada4250_state *st;
351 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
359 	st = iio_priv(indio_dev);
360 	st->regmap = regmap;
361 	st->spi = spi;
368 	mutex_init(&st->lock);
370 	ret = ada4250_init(st);