1 // SPDX-License-Identifier: GPL-2.0
43 	/* this is fine since passed float is always non-negative */  in sps30_float_to_int_clamped()
51 	exp -= 127;  in sps30_float_to_int_clamped()
54 		return ((((1 << 23) + mantissa) * 100) >> 23) >> (-exp);  in sps30_float_to_int_clamped()
58 	shift = 23 - exp;  in sps30_float_to_int_clamped()
63 	fraction = mantissa & GENMASK(shift - 1, 0);  in sps30_float_to_int_clamped()
68 static int sps30_do_meas(struct sps30_state *state, s32 *data, int size)  in sps30_do_meas()  argument
72 	if (state->state == RESET) {  in sps30_do_meas()
73 		ret = state->ops->start_meas(state);  in sps30_do_meas()
77 		state->state = MEASURING;  in sps30_do_meas()
80 	ret = state->ops->read_meas(state, (__be32 *)data, size);  in sps30_do_meas()
90 static int sps30_do_reset(struct sps30_state *state)  in sps30_do_reset()  argument
94 	ret = state->ops->reset(state);  in sps30_do_reset()
98 	state->state = RESET;  in sps30_do_reset()
106 	struct iio_dev *indio_dev = pf->indio_dev;  in sps30_trigger_handler()
107 	struct sps30_state *state = iio_priv(indio_dev);  in sps30_trigger_handler()  local
114 	mutex_lock(&state->lock);  in sps30_trigger_handler()
115 	ret = sps30_do_meas(state, scan.data, ARRAY_SIZE(scan.data));  in sps30_trigger_handler()
116 	mutex_unlock(&state->lock);  in sps30_trigger_handler()
123 	iio_trigger_notify_done(indio_dev->trig);  in sps30_trigger_handler()
132 	struct sps30_state *state = iio_priv(indio_dev);  in sps30_read_raw()  local
133 	int data[4], ret = -EINVAL;  in sps30_read_raw()
137 		switch (chan->type) {  in sps30_read_raw()
139 			mutex_lock(&state->lock);  in sps30_read_raw()
141 			switch (chan->channel2) {  in sps30_read_raw()
143 				ret = sps30_do_meas(state, data, 1);  in sps30_read_raw()
146 				ret = sps30_do_meas(state, data, 2);  in sps30_read_raw()
149 				ret = sps30_do_meas(state, data, 3);  in sps30_read_raw()
152 				ret = sps30_do_meas(state, data, 4);  in sps30_read_raw()
155 			mutex_unlock(&state->lock);  in sps30_read_raw()
159 			*val = data[chan->address] / 100;  in sps30_read_raw()
160 			*val2 = (data[chan->address] % 100) * 10000;  in sps30_read_raw()
164 			return -EINVAL;  in sps30_read_raw()
167 		switch (chan->type) {  in sps30_read_raw()
169 			switch (chan->channel2) {  in sps30_read_raw()
179 				return -EINVAL;  in sps30_read_raw()
182 			return -EINVAL;  in sps30_read_raw()
186 	return -EINVAL;  in sps30_read_raw()
194 	struct sps30_state *state = iio_priv(indio_dev);  in start_cleaning_store()  local
198 		return -EINVAL;  in start_cleaning_store()
200 	mutex_lock(&state->lock);  in start_cleaning_store()
201 	ret = state->ops->clean_fan(state);  in start_cleaning_store()
202 	mutex_unlock(&state->lock);  in start_cleaning_store()
214 	struct sps30_state *state = iio_priv(indio_dev);  in cleaning_period_show()  local
218 	mutex_lock(&state->lock);  in cleaning_period_show()
219 	ret = state->ops->read_cleaning_period(state, &val);  in cleaning_period_show()
220 	mutex_unlock(&state->lock);  in cleaning_period_show()
231 	struct sps30_state *state = iio_priv(indio_dev);  in cleaning_period_store()  local
235 		return -EINVAL;  in cleaning_period_store()
239 		return -EINVAL;  in cleaning_period_store()
241 	mutex_lock(&state->lock);  in cleaning_period_store()
242 	ret = state->ops->write_cleaning_period(state, cpu_to_be32(val));  in cleaning_period_store()
244 		mutex_unlock(&state->lock);  in cleaning_period_store()
254 	ret = sps30_do_reset(state);  in cleaning_period_store()
259 	mutex_unlock(&state->lock);  in cleaning_period_store()
319 	struct sps30_state *state = data;  in sps30_devm_stop_meas()  local
321 	if (state->state == MEASURING)  in sps30_devm_stop_meas()
322 		state->ops->stop_meas(state);  in sps30_devm_stop_meas()
330 	struct sps30_state *state;  in sps30_probe()  local
333 	indio_dev = devm_iio_device_alloc(dev, sizeof(*state));  in sps30_probe()
335 		return -ENOMEM;  in sps30_probe()
339 	state = iio_priv(indio_dev);  in sps30_probe()
340 	state->dev = dev;  in sps30_probe()
341 	state->priv = priv;  in sps30_probe()
342 	state->ops = ops;  in sps30_probe()
343 	mutex_init(&state->lock);  in sps30_probe()
345 	indio_dev->info = &sps30_info;  in sps30_probe()
346 	indio_dev->name = name;  in sps30_probe()
347 	indio_dev->channels = sps30_channels;  in sps30_probe()
348 	indio_dev->num_channels = ARRAY_SIZE(sps30_channels);  in sps30_probe()
349 	indio_dev->modes = INDIO_DIRECT_MODE;  in sps30_probe()
350 	indio_dev->available_scan_masks = sps30_scan_masks;  in sps30_probe()
352 	ret = sps30_do_reset(state);  in sps30_probe()
358 	ret = state->ops->show_info(state);  in sps30_probe()
364 	ret = devm_add_action_or_reset(dev, sps30_devm_stop_meas, state);  in sps30_probe()