1 // SPDX-License-Identifier: GPL-2.0-only
87  * struct stx104_iio - IIO device private data structure
89  * @aio_data_map: Regmap for analog I/O data
90  * @aio_ctl_map: Regmap for analog I/O control
182 		err = regmap_read(priv->aio_ctl_map, STX104_ADC_CONFIGURATION, &adc_config);  in stx104_read_raw()
189 		if (chan->output) {  in stx104_read_raw()
190 			err = regmap_read(priv->aio_data_map, STX104_DAC_OFFSET(chan->channel),  in stx104_read_raw()
198 		mutex_lock(&priv->lock);  in stx104_read_raw()
201 		err = regmap_write(priv->aio_ctl_map, STX104_ADC_CHANNEL,  in stx104_read_raw()
202 				   STX104_SINGLE_CHANNEL(chan->channel));  in stx104_read_raw()
204 			mutex_unlock(&priv->lock);  in stx104_read_raw()
209 		 * Trigger ADC sample capture by writing to the 8-bit Software Strobe Register and  in stx104_read_raw()
211 		 * in steps of 25 nanoseconds. The actual Analog Input Frame Timer time interval is  in stx104_read_raw()
216 		err = regmap_write(priv->aio_ctl_map, STX104_SOFTWARE_STROBE, 0);  in stx104_read_raw()
218 			mutex_unlock(&priv->lock);  in stx104_read_raw()
221 		err = regmap_read_poll_timeout(priv->aio_ctl_map, STX104_ADC_STATUS, adc_status,  in stx104_read_raw()
224 			mutex_unlock(&priv->lock);  in stx104_read_raw()
228 		err = regmap_read(priv->aio_data_map, STX104_ADC_DATA, &value);  in stx104_read_raw()
230 			mutex_unlock(&priv->lock);  in stx104_read_raw()
235 		mutex_unlock(&priv->lock);  in stx104_read_raw()
239 		err = regmap_read(priv->aio_ctl_map, STX104_ADC_CONFIGURATION, &adc_config);  in stx104_read_raw()
243 		*val = (u8_get_bits(adc_config, STX104_ADBU) == STX104_BIPOLAR) ? -32768 : 0;  in stx104_read_raw()
246 		/* get ADC bipolar/unipolar and gain configuration */  in stx104_read_raw()
247 		err = regmap_read(priv->aio_ctl_map, STX104_ADC_CONFIGURATION, &adc_config);  in stx104_read_raw()
257 	return -EINVAL;  in stx104_read_raw()
264 	u8 gain;  in stx104_write_raw()  local
268 		/* Only four gain states (x1, x2, x4, x8) */  in stx104_write_raw()
271 			gain = STX104_GAIN_X1;  in stx104_write_raw()
274 			gain = STX104_GAIN_X2;  in stx104_write_raw()
277 			gain = STX104_GAIN_X4;  in stx104_write_raw()
280 			gain = STX104_GAIN_X8;  in stx104_write_raw()
283 			return -EINVAL;  in stx104_write_raw()
286 		return regmap_write(priv->aio_ctl_map, STX104_ADC_CONFIGURATION, gain);  in stx104_write_raw()
288 		if (!chan->output)  in stx104_write_raw()
289 			return -EINVAL;  in stx104_write_raw()
292 			return -EINVAL;  in stx104_write_raw()
294 		return regmap_write(priv->aio_data_map, STX104_DAC_OFFSET(chan->channel), val);  in stx104_write_raw()
297 	return -EINVAL;  in stx104_write_raw()
305 /* single-ended input channels configuration */
315 /* differential input channels configuration */
327 	/* Output lines are located at same register bit offsets as input lines */  in stx104_reg_mask_xlate()
329 		offset -= 4;  in stx104_reg_mask_xlate()
347 	err = regmap_write(priv->aio_ctl_map, STX104_ADC_CONTROL, STX104_SOFTWARE_TRIGGER);  in stx104_init_hw()
351 	/* initialize gain setting to x1 */  in stx104_init_hw()
352 	err = regmap_write(priv->aio_ctl_map, STX104_ADC_CONFIGURATION, STX104_GAIN_X1);  in stx104_init_hw()
357 	err = regmap_write(priv->aio_data_map, STX104_DAC_BASE, 0);  in stx104_init_hw()
360 	err = regmap_write(priv->aio_data_map, STX104_DAC_BASE + STX104_AIO_DATA_STRIDE, 0);  in stx104_init_hw()
381 		return -ENOMEM;  in stx104_probe()
385 		dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",  in stx104_probe()
387 		return -EBUSY;  in stx104_probe()
392 		return -ENOMEM;  in stx104_probe()
410 	priv->aio_ctl_map = aio_ctl_map;  in stx104_probe()
411 	priv->aio_data_map = aio_data_map;  in stx104_probe()
413 	indio_dev->info = &stx104_info;  in stx104_probe()
414 	indio_dev->modes = INDIO_DIRECT_MODE;  in stx104_probe()
421 		indio_dev->num_channels = ARRAY_SIZE(stx104_channels_diff);  in stx104_probe()
422 		indio_dev->channels = stx104_channels_diff;  in stx104_probe()
424 		indio_dev->num_channels = ARRAY_SIZE(stx104_channels_sing);  in stx104_probe()
425 		indio_dev->channels = stx104_channels_sing;  in stx104_probe()
428 	indio_dev->name = dev_name(dev);  in stx104_probe()
430 	mutex_init(&priv->lock);  in stx104_probe()