1 // SPDX-License-Identifier: GPL-2.0
15 #include <linux/regulator/consumer.h>
18 #include <linux/gpio/consumer.h>
22 #include <linux/iio/iio.h>
23 #include <linux/iio/sysfs.h>
24 #include <linux/iio/adc/ad_sigma_delta.h>
100 	gpiod_set_value(st->powerdown_gpio, val);  in ad7780_set_mode()
118 		voltage_uv = regulator_get_voltage(st->reg);  in ad7780_read_raw()
122 		*val = voltage_uv * st->gain;  in ad7780_read_raw()
123 		*val2 = chan->scan_type.realbits - 1;  in ad7780_read_raw()
124 		st->int_vref_mv = voltage_uv;  in ad7780_read_raw()
127 		*val = -(1 << (chan->scan_type.realbits - 1));  in ad7780_read_raw()
130 		*val = st->odr;  in ad7780_read_raw()
136 	return -EINVAL;  in ad7780_read_raw()
146 	const struct ad7780_chip_info *chip_info = st->chip_info;  in ad7780_write_raw()
150 	if (!chip_info->is_ad778x)  in ad7780_write_raw()
151 		return -EINVAL;  in ad7780_write_raw()
156 			return -EINVAL;  in ad7780_write_raw()
158 		vref = st->int_vref_mv * 1000000LL;  in ad7780_write_raw()
159 		full_scale = 1 << (chip_info->channel.scan_type.realbits - 1);  in ad7780_write_raw()
162 		st->gain = gain;  in ad7780_write_raw()
167 		gpiod_set_value(st->gain_gpio, gain);  in ad7780_write_raw()
174 		st->odr = ad778x_odr_avail[val];  in ad7780_write_raw()
175 		gpiod_set_value(st->filter_gpio, val);  in ad7780_write_raw()
188 	const struct ad7780_chip_info *chip_info = st->chip_info;  in ad7780_postprocess_sample()
191 	    ((raw_sample & chip_info->pattern_mask) != chip_info->pattern))  in ad7780_postprocess_sample()
192 		return -EIO;  in ad7780_postprocess_sample()
194 	if (chip_info->is_ad778x) {  in ad7780_postprocess_sample()
195 		st->gain = ad778x_gain[raw_sample & AD7780_GAIN];  in ad7780_postprocess_sample()
196 		st->odr = ad778x_odr_avail[raw_sample & AD7780_FILTER];  in ad7780_postprocess_sample()
223 		.shift = (_wordsize) - (_bits),			\
269 	st->powerdown_gpio = devm_gpiod_get_optional(dev,  in ad7780_init_gpios()
272 	if (IS_ERR(st->powerdown_gpio)) {  in ad7780_init_gpios()
273 		ret = PTR_ERR(st->powerdown_gpio);  in ad7780_init_gpios()
278 	if (!st->chip_info->is_ad778x)  in ad7780_init_gpios()
282 	st->gain_gpio = devm_gpiod_get_optional(dev,  in ad7780_init_gpios()
285 	if (IS_ERR(st->gain_gpio)) {  in ad7780_init_gpios()
286 		ret = PTR_ERR(st->gain_gpio);  in ad7780_init_gpios()
291 	st->filter_gpio = devm_gpiod_get_optional(dev,  in ad7780_init_gpios()
294 	if (IS_ERR(st->filter_gpio)) {  in ad7780_init_gpios()
295 		ret = PTR_ERR(st->filter_gpio);  in ad7780_init_gpios()
314 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7780_probe()
316 		return -ENOMEM;  in ad7780_probe()
319 	st->gain = 1;  in ad7780_probe()
321 	ad_sd_init(&st->sd, indio_dev, spi, &ad7780_sigma_delta_info);  in ad7780_probe()
323 	st->chip_info =  in ad7780_probe()
324 		&ad7780_chip_info_tbl[spi_get_device_id(spi)->driver_data];  in ad7780_probe()
326 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7780_probe()
327 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7780_probe()
328 	indio_dev->channels = &st->chip_info->channel;  in ad7780_probe()
329 	indio_dev->num_channels = 1;  in ad7780_probe()
330 	indio_dev->info = &ad7780_info;  in ad7780_probe()
332 	ret = ad7780_init_gpios(&spi->dev, st);  in ad7780_probe()
336 	st->reg = devm_regulator_get(&spi->dev, "avdd");  in ad7780_probe()
337 	if (IS_ERR(st->reg))  in ad7780_probe()
338 		return PTR_ERR(st->reg);  in ad7780_probe()
340 	ret = regulator_enable(st->reg);  in ad7780_probe()
342 		dev_err(&spi->dev, "Failed to enable specified AVdd supply\n");  in ad7780_probe()
346 	ret = devm_add_action_or_reset(&spi->dev, ad7780_reg_disable, st->reg);  in ad7780_probe()
350 	ret = devm_ad_sd_setup_buffer_and_trigger(&spi->dev, indio_dev);  in ad7780_probe()
354 	return devm_iio_device_register(&spi->dev, indio_dev);  in ad7780_probe()