1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <linux/iio/backend.h>
20 #include <linux/iio/iio.h>
46 		return -EINVAL;  in ad7405_set_dec_rate()
49 		return -EBUSY;  in ad7405_set_dec_rate()
51 	ret = iio_backend_oversampling_ratio_set(st->back, chan->scan_index, dec_rate);  in ad7405_set_dec_rate()
57 	st->dec_rate = dec_rate;  in ad7405_set_dec_rate()
70 		*val = st->info->full_scale_mv;  in ad7405_read_raw()
71 		*val2 = indio_dev->channels[0].scan_type.realbits - 1;  in ad7405_read_raw()
74 		*val = st->dec_rate;  in ad7405_read_raw()
77 		*val = DIV_ROUND_CLOSEST_ULL(st->ref_frequency, st->dec_rate);  in ad7405_read_raw()
80 		*val = -(1 << (indio_dev->channels[0].scan_type.realbits - 1));  in ad7405_read_raw()
83 		return -EINVAL;  in ad7405_read_raw()
94 			return -EINVAL;  in ad7405_write_raw()
97 		return -EINVAL;  in ad7405_write_raw()
112 		return -EINVAL;  in ad7405_read_avail()
168 	struct device *dev = &pdev->dev;  in ad7405_probe()
176 		return -ENOMEM;  in ad7405_probe()
180 	st->info = device_get_match_data(dev);  in ad7405_probe()
181 	if (!st->info)  in ad7405_probe()
182 		return dev_err_probe(dev, -EINVAL, "no chip info\n");  in ad7405_probe()
193 	st->ref_frequency = clk_get_rate(clk);  in ad7405_probe()
194 	if (!st->ref_frequency)  in ad7405_probe()
195 		return -EINVAL;  in ad7405_probe()
197 	indio_dev->name = st->info->name;  in ad7405_probe()
198 	indio_dev->channels = &ad7405_channel;  in ad7405_probe()
199 	indio_dev->num_channels = 1;  in ad7405_probe()
200 	indio_dev->info = &ad7405_iio_info;  in ad7405_probe()
202 	st->back = devm_iio_backend_get(dev, NULL);  in ad7405_probe()
203 	if (IS_ERR(st->back))  in ad7405_probe()
204 		return dev_err_probe(dev, PTR_ERR(st->back),  in ad7405_probe()
205 				     "failed to get IIO backend");  in ad7405_probe()
207 	ret = iio_backend_chan_enable(st->back, 0);  in ad7405_probe()
211 	ret = devm_iio_backend_request_buffer(dev, st->back, indio_dev);  in ad7405_probe()
215 	ret = devm_iio_backend_enable(dev, st->back);  in ad7405_probe()
224 	ret = ad7405_set_dec_rate(indio_dev, &indio_dev->channels[0], 256);  in ad7405_probe()
250 MODULE_AUTHOR("Pop Ioan Daniel <pop.ioan-daniel@analog.com>");