128 static int adc12138_mode_programming(struct adc12138 *adc, u8 mode,  in adc12138_mode_programming()  argument
132 		.tx_buf = adc->tx_buf,  in adc12138_mode_programming()
133 		.rx_buf = adc->rx_buf,  in adc12138_mode_programming()
139 	if (adc->id != adc12138)  in adc12138_mode_programming()
142 	adc->tx_buf[0] = mode;  in adc12138_mode_programming()
144 	ret = spi_sync_transfer(adc->spi, &xfer, 1);  in adc12138_mode_programming()
148 	memcpy(rx_buf, adc->rx_buf, len);  in adc12138_mode_programming()
153 static int adc12138_read_status(struct adc12138 *adc)  in adc12138_read_status()  argument
158 	ret = adc12138_mode_programming(adc, ADC12138_MODE_READ_STATUS,  in adc12138_read_status()
166 static int __adc12138_start_conv(struct adc12138 *adc,  in __adc12138_start_conv()  argument
175 	return adc12138_mode_programming(adc, mode, data, len);  in __adc12138_start_conv()
178 static int adc12138_start_conv(struct adc12138 *adc,  in adc12138_start_conv()  argument
183 	return __adc12138_start_conv(adc, channel, &trash, 1);  in adc12138_start_conv()
186 static int adc12138_start_and_read_conv(struct adc12138 *adc,  in adc12138_start_and_read_conv()  argument
190 	return __adc12138_start_conv(adc, channel, data, 2);  in adc12138_start_and_read_conv()
193 static int adc12138_read_conv_data(struct adc12138 *adc, __be16 *value)  in adc12138_read_conv_data()  argument
196 	return adc12138_mode_programming(adc, ADC12138_MODE_READ_STATUS,  in adc12138_read_conv_data()
200 static int adc12138_wait_eoc(struct adc12138 *adc, unsigned long timeout)  in adc12138_wait_eoc()  argument
202 	if (!wait_for_completion_timeout(&adc->complete, timeout))  in adc12138_wait_eoc()
208 static int adc12138_adc_conversion(struct adc12138 *adc,  in adc12138_adc_conversion()  argument
214 	reinit_completion(&adc->complete);  in adc12138_adc_conversion()
216 	ret = adc12138_start_conv(adc, channel);  in adc12138_adc_conversion()
220 	ret = adc12138_wait_eoc(adc, msecs_to_jiffies(100));  in adc12138_adc_conversion()
224 	return adc12138_read_conv_data(adc, value);  in adc12138_adc_conversion()
231 	struct adc12138 *adc = iio_priv(iio);  in adc12138_read_raw()  local
237 		mutex_lock(&adc->lock);  in adc12138_read_raw()
238 		ret = adc12138_adc_conversion(adc, channel, &data);  in adc12138_read_raw()
239 		mutex_unlock(&adc->lock);  in adc12138_read_raw()
248 		ret = regulator_get_voltage(adc->vref_p);  in adc12138_read_raw()
253 		if (!IS_ERR(adc->vref_n)) {  in adc12138_read_raw()
254 			ret = regulator_get_voltage(adc->vref_n);  in adc12138_read_raw()
266 		if (!IS_ERR(adc->vref_n)) {  in adc12138_read_raw()
267 			*value = regulator_get_voltage(adc->vref_n);  in adc12138_read_raw()
287 static int adc12138_init(struct adc12138 *adc)  in adc12138_init()  argument
294 	reinit_completion(&adc->complete);  in adc12138_init()
296 	ret = adc12138_mode_programming(adc, ADC12138_MODE_AUTO_CAL, &trash, 1);  in adc12138_init()
301 	status = adc12138_read_status(adc);  in adc12138_init()
305 	adc12138_wait_eoc(adc, msecs_to_jiffies(100));  in adc12138_init()
307 	status = adc12138_read_status(adc);  in adc12138_init()
309 		dev_warn(&adc->spi->dev,  in adc12138_init()
315 	switch (adc->acquisition_time) {  in adc12138_init()
332 	return adc12138_mode_programming(adc, mode, &trash, 1);  in adc12138_init()
339 	struct adc12138 *adc = iio_priv(indio_dev);  in adc12138_trigger_handler()  local
345 	mutex_lock(&adc->lock);  in adc12138_trigger_handler()
352 		reinit_completion(&adc->complete);  in adc12138_trigger_handler()
354 		ret = adc12138_start_and_read_conv(adc, scan_chan,  in adc12138_trigger_handler()
355 					i ? &adc->data[i - 1] : &trash);  in adc12138_trigger_handler()
357 			dev_warn(&adc->spi->dev,  in adc12138_trigger_handler()
362 		ret = adc12138_wait_eoc(adc, msecs_to_jiffies(100));  in adc12138_trigger_handler()
364 			dev_warn(&adc->spi->dev, "wait eoc timeout\n");  in adc12138_trigger_handler()
372 		ret = adc12138_read_conv_data(adc, &adc->data[i - 1]);  in adc12138_trigger_handler()
374 			dev_warn(&adc->spi->dev,  in adc12138_trigger_handler()
380 	iio_push_to_buffers_with_timestamp(indio_dev, adc->data,  in adc12138_trigger_handler()
383 	mutex_unlock(&adc->lock);  in adc12138_trigger_handler()
393 	struct adc12138 *adc = iio_priv(indio_dev);  in adc12138_eoc_handler()  local
395 	complete(&adc->complete);  in adc12138_eoc_handler()
403 	struct adc12138 *adc;  in adc12138_probe()  local
406 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));  in adc12138_probe()
410 	adc = iio_priv(indio_dev);  in adc12138_probe()
411 	adc->spi = spi;  in adc12138_probe()
412 	adc->id = spi_get_device_id(spi)->driver_data;  in adc12138_probe()
413 	mutex_init(&adc->lock);  in adc12138_probe()
414 	init_completion(&adc->complete);  in adc12138_probe()
420 	switch (adc->id) {  in adc12138_probe()
435 				       &adc->acquisition_time);  in adc12138_probe()
437 		adc->acquisition_time = 10;  in adc12138_probe()
439 	adc->cclk = devm_clk_get(&spi->dev, NULL);  in adc12138_probe()
440 	if (IS_ERR(adc->cclk))  in adc12138_probe()
441 		return PTR_ERR(adc->cclk);  in adc12138_probe()
443 	adc->vref_p = devm_regulator_get(&spi->dev, "vref-p");  in adc12138_probe()
444 	if (IS_ERR(adc->vref_p))  in adc12138_probe()
445 		return PTR_ERR(adc->vref_p);  in adc12138_probe()
447 	adc->vref_n = devm_regulator_get_optional(&spi->dev, "vref-n");  in adc12138_probe()
448 	if (IS_ERR(adc->vref_n)) {  in adc12138_probe()
453 		ret = PTR_ERR(adc->vref_n);  in adc12138_probe()
463 	ret = clk_prepare_enable(adc->cclk);  in adc12138_probe()
467 	ret = regulator_enable(adc->vref_p);  in adc12138_probe()
471 	if (!IS_ERR(adc->vref_n)) {  in adc12138_probe()
472 		ret = regulator_enable(adc->vref_n);  in adc12138_probe()
477 	ret = adc12138_init(adc);  in adc12138_probe()
496 	if (!IS_ERR(adc->vref_n))  in adc12138_probe()
497 		regulator_disable(adc->vref_n);  in adc12138_probe()
499 	regulator_disable(adc->vref_p);  in adc12138_probe()
501 	clk_disable_unprepare(adc->cclk);  in adc12138_probe()
509 	struct adc12138 *adc = iio_priv(indio_dev);  in adc12138_remove()  local
513 	if (!IS_ERR(adc->vref_n))  in adc12138_remove()
514 		regulator_disable(adc->vref_n);  in adc12138_remove()
515 	regulator_disable(adc->vref_p);  in adc12138_remove()
516 	clk_disable_unprepare(adc->cclk);  in adc12138_remove()