1 // SPDX-License-Identifier: GPL-2.0
4  * TI ADC081S/ADC101S/ADC121S 8/10/12-bit SPI ADC driver
80 	if (!st->convst_gpio)  in ad7091_convst()
83 	gpiod_set_value(st->convst_gpio, 0);  in ad7091_convst()
85 	gpiod_set_value(st->convst_gpio, 1);  in ad7091_convst()
89 static irqreturn_t ad7476_trigger_handler(int irq, void  *p)  in ad7476_trigger_handler()  argument
91 	struct iio_poll_func *pf = p;  in ad7476_trigger_handler()
92 	struct iio_dev *indio_dev = pf->indio_dev;  in ad7476_trigger_handler()
98 	b_sent = spi_sync(st->spi, &st->msg);  in ad7476_trigger_handler()
102 	iio_push_to_buffers_with_timestamp(indio_dev, st->data,  in ad7476_trigger_handler()
105 	iio_trigger_notify_done(indio_dev->trig);  in ad7476_trigger_handler()
113 	spi_read(st->spi, st->data, 1);  in ad7091_reset()
122 	ret = spi_sync(st->spi, &st->msg);  in ad7476_scan_direct()
126 	return be16_to_cpup((__be16 *)st->data);  in ad7476_scan_direct()
149 		*val = (ret >> st->chip_info->channel[0].scan_type.shift) &  in ad7476_read_raw()
150 			GENMASK(st->chip_info->channel[0].scan_type.realbits - 1, 0);  in ad7476_read_raw()
153 		if (st->ref_reg) {  in ad7476_read_raw()
154 			scale_uv = regulator_get_voltage(st->ref_reg);  in ad7476_read_raw()
158 			scale_uv = st->chip_info->int_vref_uv;  in ad7476_read_raw()
161 		*val2 = chan->scan_type.realbits;  in ad7476_read_raw()
164 	return -EINVAL;  in ad7476_read_raw()
182 #define ADC081S_CHAN(bits) _AD7476_CHAN((bits), 12 - (bits), \
184 #define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \
186 #define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
188 #define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
189 #define AD7091R_CONVST_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), \
191 #define ADS786X_CHAN(bits) _AD7476_CHAN((bits), 12 - (bits), \
310 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7476_probe()
312 		return -ENOMEM;  in ad7476_probe()
315 	st->chip_info =  in ad7476_probe()
316 		&ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];  in ad7476_probe()
318 	reg = devm_regulator_get(&spi->dev, "vcc");  in ad7476_probe()
326 	ret = devm_add_action_or_reset(&spi->dev, ad7476_reg_disable, reg);  in ad7476_probe()
330 	/* Either vcc or vref (below) as appropriate */  in ad7476_probe()
331 	if (!st->chip_info->int_vref_uv)  in ad7476_probe()
332 		st->ref_reg = reg;  in ad7476_probe()
334 	if (st->chip_info->has_vref) {  in ad7476_probe()
336 		/* If a device has an internal reference vref is optional */  in ad7476_probe()
337 		if (st->chip_info->int_vref_uv) {  in ad7476_probe()
338 			reg = devm_regulator_get_optional(&spi->dev, "vref");  in ad7476_probe()
339 			if (IS_ERR(reg) && (PTR_ERR(reg) != -ENODEV))  in ad7476_probe()
342 			reg = devm_regulator_get(&spi->dev, "vref");  in ad7476_probe()
352 			ret = devm_add_action_or_reset(&spi->dev,  in ad7476_probe()
357 			st->ref_reg = reg;  in ad7476_probe()
366 			st->ref_reg = NULL;  in ad7476_probe()
370 	if (st->chip_info->has_vdrive) {  in ad7476_probe()
371 		ret = devm_regulator_get_enable(&spi->dev, "vdrive");  in ad7476_probe()
376 	st->convst_gpio = devm_gpiod_get_optional(&spi->dev,  in ad7476_probe()
377 						  "adi,conversion-start",  in ad7476_probe()
379 	if (IS_ERR(st->convst_gpio))  in ad7476_probe()
380 		return PTR_ERR(st->convst_gpio);  in ad7476_probe()
382 	st->spi = spi;  in ad7476_probe()
384 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7476_probe()
385 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7476_probe()
386 	indio_dev->channels = st->chip_info->channel;  in ad7476_probe()
387 	indio_dev->num_channels = 2;  in ad7476_probe()
388 	indio_dev->info = &ad7476_info;  in ad7476_probe()
390 	if (st->convst_gpio)  in ad7476_probe()
391 		indio_dev->channels = st->chip_info->convst_channel;  in ad7476_probe()
394 	st->xfer.rx_buf = &st->data;  in ad7476_probe()
395 	st->xfer.len = st->chip_info->channel[0].scan_type.storagebits / 8;  in ad7476_probe()
397 	spi_message_init(&st->msg);  in ad7476_probe()
398 	spi_message_add_tail(&st->xfer, &st->msg);  in ad7476_probe()
400 	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL,  in ad7476_probe()
405 	if (st->chip_info->reset)  in ad7476_probe()
406 		st->chip_info->reset(st);  in ad7476_probe()
408 	return devm_iio_device_register(&spi->dev, indio_dev);  in ad7476_probe()
439 	{ "ltc2314-14", ID_LTC2314_14 },
454 MODULE_DESCRIPTION("Analog Devices AD7476 and similar 1-channel ADCs");