1 // SPDX-License-Identifier: GPL-2.0-only
7 …-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/bo…
36  * HSC_PRESSURE_TRIPLET_LEN - length for the string that defines the
37  * pressure range, measurement unit and type as per the part nomenclature.
38  * Consult honeywell,pressure-triplet in the bindings file for details.
51  * function A: 10% - 90% of 2^14
52  * function B:  5% - 95% of 2^14
53  * function C:  5% - 85% of 2^14
54  * function F:  4% - 94% of 2^14
140  * struct hsc_range_config - list of pressure ranges based on nomenclature
157 	[HSC1_6MD] = { .pmin =    -160, .pmax =     160 },
158 	[HSC2_5MD] = { .pmin =    -250, .pmax =     250 },
159 	[HSC004MD] = { .pmin =    -400, .pmax =     400 },
160 	[HSC006MD] = { .pmin =    -600, .pmax =     600 },
161 	[HSC010MD] = { .pmin =   -1000, .pmax =    1000 },
162 	[HSC016MD] = { .pmin =   -1600, .pmax =    1600 },
163 	[HSC025MD] = { .pmin =   -2500, .pmax =    2500 },
164 	[HSC040MD] = { .pmin =   -4000, .pmax =    4000 },
165 	[HSC060MD] = { .pmin =   -6000, .pmax =    6000 },
166 	[HSC100MD] = { .pmin =  -10000, .pmax =   10000 },
167 	[HSC160MD] = { .pmin =  -16000, .pmax =   16000 },
168 	[HSC250MD] = { .pmin =  -25000, .pmax =   25000 },
169 	[HSC400MD] = { .pmin =  -40000, .pmax =   40000 },
170 	[HSC600MD] = { .pmin =  -60000, .pmax =   60000 },
171 	[HSC001BD] = { .pmin = -100000, .pmax =  100000 },
172 	[HSC1_6BD] = { .pmin = -160000, .pmax =  160000 },
173 	[HSC2_5BD] = { .pmin = -250000, .pmax =  250000 },
174 	[HSC004BD] = { .pmin = -400000, .pmax =  400000 },
200 	[HSC160LD] = { .pmin =    -160, .pmax =     160 },
201 	[HSC250LD] = { .pmin =    -250, .pmax =     250 },
202 	[HSC400LD] = { .pmin =    -400, .pmax =     400 },
203 	[HSC600LD] = { .pmin =    -600, .pmax =     600 },
204 	[HSC001KD] = { .pmin =   -1000, .pmax =    1000 },
205 	[HSC1_6KD] = { .pmin =   -1600, .pmax =    1600 },
206 	[HSC2_5KD] = { .pmin =   -2500, .pmax =    2500 },
207 	[HSC004KD] = { .pmin =   -4000, .pmax =    4000 },
208 	[HSC006KD] = { .pmin =   -6000, .pmax =    6000 },
209 	[HSC010KD] = { .pmin =  -10000, .pmax =   10000 },
210 	[HSC016KD] = { .pmin =  -16000, .pmax =   16000 },
211 	[HSC025KD] = { .pmin =  -25000, .pmax =   25000 },
212 	[HSC040KD] = { .pmin =  -40000, .pmax =   40000 },
213 	[HSC060KD] = { .pmin =  -60000, .pmax =   60000 },
214 	[HSC100KD] = { .pmin = -100000, .pmax =  100000 },
215 	[HSC160KD] = { .pmin = -160000, .pmax =  160000 },
216 	[HSC250KD] = { .pmin = -250000, .pmax =  250000 },
217 	[HSC400KD] = { .pmin = -400000, .pmax =  400000 },
242 	[HSC0_5ND] = { .pmin =    -125, .pmax =     125 },
243 	[HSC001ND] = { .pmin =    -249, .pmax =     249 },
244 	[HSC002ND] = { .pmin =    -498, .pmax =     498 },
245 	[HSC004ND] = { .pmin =    -996, .pmax =     996 },
246 	[HSC005ND] = { .pmin =   -1245, .pmax =    1245 },
247 	[HSC010ND] = { .pmin =   -2491, .pmax =    2491 },
248 	[HSC020ND] = { .pmin =   -4982, .pmax =    4982 },
249 	[HSC030ND] = { .pmin =   -7473, .pmax =    7473 },
250 	[HSC001PD] = { .pmin =   -6895, .pmax =    6895 },
251 	[HSC005PD] = { .pmin =  -34474, .pmax =   34474 },
252 	[HSC015PD] = { .pmin = -103421, .pmax =  103421 },
253 	[HSC030PD] = { .pmin = -206843, .pmax =  206843 },
254 	[HSC060PD] = { .pmin = -413685, .pmax =  413685 },
272  * hsc_measurement_is_valid() - validate last conversion via status bits
277  *   00 - normal operation, valid data
278  *   01 - device in factory programming mode
279  *   10 - stale data
280  *   11 - diagnostic condition
284 	return !(data->buffer[0] & HSC_STATUS_MASK);  in hsc_measurement_is_valid()
289 	const struct hsc_chip_data *chip = data->chip;  in hsc_get_measurement()
292 	ret = data->recv_cb(data);  in hsc_get_measurement()
296 	data->is_valid = chip->valid(data);  in hsc_get_measurement()
297 	if (!data->is_valid)  in hsc_get_measurement()
298 		return -EAGAIN;  in hsc_get_measurement()
306 	struct iio_dev *indio_dev = pf->indio_dev;  in hsc_trigger_handler()
314 	memcpy(&data->scan.chan[0], &data->buffer[0], 2);  in hsc_trigger_handler()
315 	memcpy(&data->scan.chan[1], &data->buffer[2], 2);  in hsc_trigger_handler()
317 	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,  in hsc_trigger_handler()
321 	iio_trigger_notify_done(indio_dev->trig);  in hsc_trigger_handler()
332  *   where a = 200/2047; b = -50
337  *  offset = b/a = -50 / .097703957 = -50000000 / 97704
340  *  pressure = (conv - Omin) * Q + Pmin =
341  *          ((conv - Omin) + Pmin/Q) * Q
343  *  scale = Q = (Pmax - Pmin) / (Omax - Omin)
344  *  offset = Pmin/Q - Omin = Pmin * (Omax - Omin) / (Pmax - Pmin) - Omin
360 		recvd = get_unaligned_be32(data->buffer);  in hsc_read_raw()
361 		switch (channel->type) {  in hsc_read_raw()
369 			return -EINVAL;  in hsc_read_raw()
373 		switch (channel->type) {  in hsc_read_raw()
379 			*val = data->p_scale;  in hsc_read_raw()
380 			*val2 = data->p_scale_dec;  in hsc_read_raw()
383 			return -EINVAL;  in hsc_read_raw()
387 		switch (channel->type) {  in hsc_read_raw()
389 			*val = -50000000;  in hsc_read_raw()
393 			*val = data->p_offset;  in hsc_read_raw()
394 			*val2 = data->p_offset_dec;  in hsc_read_raw()
397 			return -EINVAL;  in hsc_read_raw()
401 		return -EINVAL;  in hsc_read_raw()
456 		return -ENOMEM;  in hsc_common_probe()
460 	hsc->chip = &hsc_chip;  in hsc_common_probe()
461 	hsc->recv_cb = recv;  in hsc_common_probe()
462 	hsc->dev = dev;  in hsc_common_probe()
464 	ret = device_property_read_u32(dev, "honeywell,transfer-function",  in hsc_common_probe()
465 				       &hsc->function);  in hsc_common_probe()
468 			    "honeywell,transfer-function could not be read\n");  in hsc_common_probe()
469 	if (hsc->function > HSC_FUNCTION_F)  in hsc_common_probe()
470 		return dev_err_probe(dev, -EINVAL,  in hsc_common_probe()
471 				     "honeywell,transfer-function %d invalid\n",  in hsc_common_probe()
472 				     hsc->function);  in hsc_common_probe()
474 	ret = device_property_read_string(dev, "honeywell,pressure-triplet",  in hsc_common_probe()
478 			     "honeywell,pressure-triplet could not be read\n");  in hsc_common_probe()
481 		ret = device_property_read_u32(dev, "honeywell,pmin-pascal",  in hsc_common_probe()
482 					       &hsc->pmin);  in hsc_common_probe()
485 				  "honeywell,pmin-pascal could not be read\n");  in hsc_common_probe()
487 		ret = device_property_read_u32(dev, "honeywell,pmax-pascal",  in hsc_common_probe()
488 					       &hsc->pmax);  in hsc_common_probe()
491 				  "honeywell,pmax-pascal could not be read\n");  in hsc_common_probe()
494 						  "honeywell,pressure-triplet",  in hsc_common_probe()
498 			return dev_err_probe(dev, -EINVAL,  in hsc_common_probe()
499 				    "honeywell,pressure-triplet is invalid\n");  in hsc_common_probe()
501 		hsc->pmin = hsc_range_config[ret].pmin;  in hsc_common_probe()
502 		hsc->pmax = hsc_range_config[ret].pmax;  in hsc_common_probe()
505 	if (hsc->pmin >= hsc->pmax)  in hsc_common_probe()
506 		return dev_err_probe(dev, -EINVAL,  in hsc_common_probe()
513 	hsc->outmin = hsc_func_spec[hsc->function].output_min;  in hsc_common_probe()
514 	hsc->outmax = hsc_func_spec[hsc->function].output_max;  in hsc_common_probe()
516 	tmp = div_s64(((s64)(hsc->pmax - hsc->pmin)) * MICRO,  in hsc_common_probe()
517 		      hsc->outmax - hsc->outmin);  in hsc_common_probe()
518 	hsc->p_scale = div_s64_rem(tmp, NANO, &hsc->p_scale_dec);  in hsc_common_probe()
519 	tmp = div_s64(((s64)hsc->pmin * (s64)(hsc->outmax - hsc->outmin)) * MICRO,  in hsc_common_probe()
520 		      hsc->pmax - hsc->pmin);  in hsc_common_probe()
521 	tmp -= (s64)hsc->outmin * MICRO;  in hsc_common_probe()
522 	hsc->p_offset = div_s64_rem(tmp, MICRO, &hsc->p_offset_dec);  in hsc_common_probe()
524 	indio_dev->name = "hsc030pa";  in hsc_common_probe()
525 	indio_dev->modes = INDIO_DIRECT_MODE;  in hsc_common_probe()
526 	indio_dev->info = &hsc_info;  in hsc_common_probe()
527 	indio_dev->channels = hsc->chip->channels;  in hsc_common_probe()
528 	indio_dev->num_channels = hsc->chip->num_channels;  in hsc_common_probe()
540 MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor core driver");