1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
7 #include <linux/delay.h>
11 #include <linux/spi/spi.h>
165 	} while (--i >= 0);  in smi240_crc3()
189 	struct spi_device *spi = context;  in smi240_regmap_spi_read()  local
190 	struct iio_dev *indio_dev = dev_get_drvdata(&spi->dev);  in smi240_regmap_spi_read()
194 		return -EINVAL;  in smi240_regmap_spi_read()
197 	request |= FIELD_PREP(SMI240_WRITE_CAP_BIT_MASK, iio_priv_data->capture);  in smi240_regmap_spi_read()
201 	iio_priv_data->spi_buf = cpu_to_be32(request);  in smi240_regmap_spi_read()
205 	 * SPI protocol, where the slave interface responds to  in smi240_regmap_spi_read()
207 	 * CS signal must toggle (> 700 ns) between the frames.  in smi240_regmap_spi_read()
209 	ret = spi_write(spi, &iio_priv_data->spi_buf, sizeof(request));  in smi240_regmap_spi_read()
213 	ret = spi_read(spi, &iio_priv_data->spi_buf, sizeof(response));  in smi240_regmap_spi_read()
217 	response = be32_to_cpu(iio_priv_data->spi_buf);  in smi240_regmap_spi_read()
220 		return -EIO;  in smi240_regmap_spi_read()
234 	struct spi_device *spi = context;  in smi240_regmap_spi_write()  local
235 	struct iio_dev *indio_dev = dev_get_drvdata(&spi->dev);  in smi240_regmap_spi_write()
239 		return -EINVAL;  in smi240_regmap_spi_write()
250 	iio_priv_data->spi_buf = cpu_to_be32(request);  in smi240_regmap_spi_write()
252 	return spi_write(spi, &iio_priv_data->spi_buf, sizeof(request));  in smi240_regmap_spi_write()
270 	ret = regmap_write(data->regmap, SMI240_CMD_REG, SMI240_SOFT_RESET_CMD);  in smi240_soft_reset()
284 	switch (data->accel_filter_freq) {  in smi240_soft_config()
292 		return -EINVAL;  in smi240_soft_config()
295 	switch (data->anglvel_filter_freq) {  in smi240_soft_config()
303 		return -EINVAL;  in smi240_soft_config()
311 			      data->built_in_self_test_count - 1);  in smi240_soft_config()
313 	ret = regmap_write(data->regmap, SMI240_SOFT_CONFIG_REG, request);  in smi240_soft_config()
318 	       data->built_in_self_test_count * SMI240_BITE_SEQUENCE_DELAY_US +  in smi240_soft_config()
329 		*val = data->accel_filter_freq;  in smi240_get_low_pass_filter_freq()
332 		*val = data->anglvel_filter_freq;  in smi240_get_low_pass_filter_freq()
335 		return -EINVAL;  in smi240_get_low_pass_filter_freq()
350 		reg = SMI240_ACCEL_X_CUR_REG + (axis - IIO_MOD_X);  in smi240_get_data()
353 		reg = SMI240_GYRO_X_CUR_REG + (axis - IIO_MOD_X);  in smi240_get_data()
356 		return -EINVAL;  in smi240_get_data()
359 	ret = regmap_read(data->regmap, reg, &sample);  in smi240_get_data()
371 	struct iio_dev *indio_dev = pf->indio_dev;  in smi240_trigger_handler()
376 	data->capture = SMI240_CAPTURE_ON;  in smi240_trigger_handler()
379 		ret = regmap_read(data->regmap, base + chan, &sample);  in smi240_trigger_handler()
380 		data->capture = SMI240_CAPTURE_OFF;  in smi240_trigger_handler()
383 		data->buf[i++] = sample;  in smi240_trigger_handler()
386 	iio_push_to_buffers_with_timestamp(indio_dev, data->buf, pf->timestamp);  in smi240_trigger_handler()
389 	iio_trigger_notify_done(indio_dev->trig);  in smi240_trigger_handler()
404 		return -EINVAL;  in smi240_read_avail()
420 		ret = smi240_get_data(data, chan->type, chan->channel2, val);  in smi240_read_raw()
427 		ret = smi240_get_low_pass_filter_freq(data, chan->type, val);  in smi240_read_raw()
433 		switch (chan->type) {  in smi240_read_raw()
447 			return -EINVAL;  in smi240_read_raw()
451 		if (chan->type == IIO_TEMP) {  in smi240_read_raw()
455 			return -EINVAL;  in smi240_read_raw()
459 		return -EINVAL;  in smi240_read_raw()
478 			return -EINVAL;  in smi240_write_raw()
480 		switch (chan->type) {  in smi240_write_raw()
482 			data->accel_filter_freq = val;  in smi240_write_raw()
485 			data->anglvel_filter_freq = val;  in smi240_write_raw()
488 			return -EINVAL;  in smi240_write_raw()
492 		return -EINVAL;  in smi240_write_raw()
508 		switch (chan->type) {  in smi240_write_raw_get_fmt()
523 	data->accel_filter_freq = SMI240_HIGH_BANDWIDTH_HZ;  in smi240_init()
524 	data->anglvel_filter_freq = SMI240_HIGH_BANDWIDTH_HZ;  in smi240_init()
525 	data->built_in_self_test_count = SMI240_BUILT_IN_SELF_TEST_COUNT;  in smi240_init()
541 static int smi240_probe(struct spi_device *spi)  in smi240_probe()  argument
543 	struct device *dev = &spi->dev;  in smi240_probe()
551 		return -ENOMEM;  in smi240_probe()
557 				     "Failed to initialize SPI Regmap\n");  in smi240_probe()
561 	data->regmap = regmap;  in smi240_probe()
562 	data->capture = SMI240_CAPTURE_OFF;  in smi240_probe()
564 	ret = regmap_read(data->regmap, SMI240_CHIP_ID_REG, &response);  in smi240_probe()
576 	indio_dev->channels = smi240_channels;  in smi240_probe()
577 	indio_dev->num_channels = ARRAY_SIZE(smi240_channels);  in smi240_probe()
578 	indio_dev->name = "smi240";  in smi240_probe()
579 	indio_dev->modes = INDIO_DIRECT_MODE;  in smi240_probe()
580 	indio_dev->info = &smi240_info;  in smi240_probe()
587 				     "Setup triggered buffer failed\n");  in smi240_probe()
600 MODULE_DEVICE_TABLE(spi, smi240_spi_id);
620 MODULE_DESCRIPTION("Bosch SMI240 SPI driver");