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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Honeywell TruStability HSC Series pressure/temperature sensor4 *5 * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro>6 *7 * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/trustability-hsc-series/documents/sps-siot-trustability-hsc-series-high-accuracy-board-mount-pressure-sensors-50099148-a-en-ciid-151133.pdf8 */9 10#include <linux/array_size.h>11#include <linux/bitfield.h>12#include <linux/bits.h>13#include <linux/cleanup.h>14#include <linux/init.h>15#include <linux/math64.h>16#include <linux/mod_devicetable.h>17#include <linux/module.h>18#include <linux/printk.h>19#include <linux/property.h>20#include <linux/regulator/consumer.h>21#include <linux/string.h>22#include <linux/types.h>23#include <linux/units.h>24 25#include <linux/iio/buffer.h>26#include <linux/iio/iio.h>27#include <linux/iio/sysfs.h>28#include <linux/iio/trigger_consumer.h>29#include <linux/iio/triggered_buffer.h>30 31#include <linux/unaligned.h>32 33#include "hsc030pa.h"34 35/*36 * HSC_PRESSURE_TRIPLET_LEN - length for the string that defines the37 * pressure range, measurement unit and type as per the part nomenclature.38 * Consult honeywell,pressure-triplet in the bindings file for details.39 */40#define HSC_PRESSURE_TRIPLET_LEN 641#define HSC_STATUS_MASK GENMASK(7, 6)42#define HSC_TEMPERATURE_MASK GENMASK(15, 5)43#define HSC_PRESSURE_MASK GENMASK(29, 16)44 45struct hsc_func_spec {46 u32 output_min;47 u32 output_max;48};49 50/*51 * function A: 10% - 90% of 2^1452 * function B: 5% - 95% of 2^1453 * function C: 5% - 85% of 2^1454 * function F: 4% - 94% of 2^1455 */56static const struct hsc_func_spec hsc_func_spec[] = {57 [HSC_FUNCTION_A] = { .output_min = 1638, .output_max = 14746 },58 [HSC_FUNCTION_B] = { .output_min = 819, .output_max = 15565 },59 [HSC_FUNCTION_C] = { .output_min = 819, .output_max = 13926 },60 [HSC_FUNCTION_F] = { .output_min = 655, .output_max = 15401 },61};62 63enum hsc_variants {64 HSC001BA = 0x00, HSC1_6BA = 0x01, HSC2_5BA = 0x02, HSC004BA = 0x03,65 HSC006BA = 0x04, HSC010BA = 0x05, HSC1_6MD = 0x06, HSC2_5MD = 0x07,66 HSC004MD = 0x08, HSC006MD = 0x09, HSC010MD = 0x0a, HSC016MD = 0x0b,67 HSC025MD = 0x0c, HSC040MD = 0x0d, HSC060MD = 0x0e, HSC100MD = 0x0f,68 HSC160MD = 0x10, HSC250MD = 0x11, HSC400MD = 0x12, HSC600MD = 0x13,69 HSC001BD = 0x14, HSC1_6BD = 0x15, HSC2_5BD = 0x16, HSC004BD = 0x17,70 HSC2_5MG = 0x18, HSC004MG = 0x19, HSC006MG = 0x1a, HSC010MG = 0x1b,71 HSC016MG = 0x1c, HSC025MG = 0x1d, HSC040MG = 0x1e, HSC060MG = 0x1f,72 HSC100MG = 0x20, HSC160MG = 0x21, HSC250MG = 0x22, HSC400MG = 0x23,73 HSC600MG = 0x24, HSC001BG = 0x25, HSC1_6BG = 0x26, HSC2_5BG = 0x27,74 HSC004BG = 0x28, HSC006BG = 0x29, HSC010BG = 0x2a, HSC100KA = 0x2b,75 HSC160KA = 0x2c, HSC250KA = 0x2d, HSC400KA = 0x2e, HSC600KA = 0x2f,76 HSC001GA = 0x30, HSC160LD = 0x31, HSC250LD = 0x32, HSC400LD = 0x33,77 HSC600LD = 0x34, HSC001KD = 0x35, HSC1_6KD = 0x36, HSC2_5KD = 0x37,78 HSC004KD = 0x38, HSC006KD = 0x39, HSC010KD = 0x3a, HSC016KD = 0x3b,79 HSC025KD = 0x3c, HSC040KD = 0x3d, HSC060KD = 0x3e, HSC100KD = 0x3f,80 HSC160KD = 0x40, HSC250KD = 0x41, HSC400KD = 0x42, HSC250LG = 0x43,81 HSC400LG = 0x44, HSC600LG = 0x45, HSC001KG = 0x46, HSC1_6KG = 0x47,82 HSC2_5KG = 0x48, HSC004KG = 0x49, HSC006KG = 0x4a, HSC010KG = 0x4b,83 HSC016KG = 0x4c, HSC025KG = 0x4d, HSC040KG = 0x4e, HSC060KG = 0x4f,84 HSC100KG = 0x50, HSC160KG = 0x51, HSC250KG = 0x52, HSC400KG = 0x53,85 HSC600KG = 0x54, HSC001GG = 0x55, HSC015PA = 0x56, HSC030PA = 0x57,86 HSC060PA = 0x58, HSC100PA = 0x59, HSC150PA = 0x5a, HSC0_5ND = 0x5b,87 HSC001ND = 0x5c, HSC002ND = 0x5d, HSC004ND = 0x5e, HSC005ND = 0x5f,88 HSC010ND = 0x60, HSC020ND = 0x61, HSC030ND = 0x62, HSC001PD = 0x63,89 HSC005PD = 0x64, HSC015PD = 0x65, HSC030PD = 0x66, HSC060PD = 0x67,90 HSC001NG = 0x68, HSC002NG = 0x69, HSC004NG = 0x6a, HSC005NG = 0x6b,91 HSC010NG = 0x6c, HSC020NG = 0x6d, HSC030NG = 0x6e, HSC001PG = 0x6f,92 HSC005PG = 0x70, HSC015PG = 0x71, HSC030PG = 0x72, HSC060PG = 0x73,93 HSC100PG = 0x74, HSC150PG = 0x75, HSC_VARIANTS_MAX94};95 96static const char * const hsc_triplet_variants[HSC_VARIANTS_MAX] = {97 [HSC001BA] = "001BA", [HSC1_6BA] = "1.6BA", [HSC2_5BA] = "2.5BA",98 [HSC004BA] = "004BA", [HSC006BA] = "006BA", [HSC010BA] = "010BA",99 [HSC1_6MD] = "1.6MD", [HSC2_5MD] = "2.5MD", [HSC004MD] = "004MD",100 [HSC006MD] = "006MD", [HSC010MD] = "010MD", [HSC016MD] = "016MD",101 [HSC025MD] = "025MD", [HSC040MD] = "040MD", [HSC060MD] = "060MD",102 [HSC100MD] = "100MD", [HSC160MD] = "160MD", [HSC250MD] = "250MD",103 [HSC400MD] = "400MD", [HSC600MD] = "600MD", [HSC001BD] = "001BD",104 [HSC1_6BD] = "1.6BD", [HSC2_5BD] = "2.5BD", [HSC004BD] = "004BD",105 [HSC2_5MG] = "2.5MG", [HSC004MG] = "004MG", [HSC006MG] = "006MG",106 [HSC010MG] = "010MG", [HSC016MG] = "016MG", [HSC025MG] = "025MG",107 [HSC040MG] = "040MG", [HSC060MG] = "060MG", [HSC100MG] = "100MG",108 [HSC160MG] = "160MG", [HSC250MG] = "250MG", [HSC400MG] = "400MG",109 [HSC600MG] = "600MG", [HSC001BG] = "001BG", [HSC1_6BG] = "1.6BG",110 [HSC2_5BG] = "2.5BG", [HSC004BG] = "004BG", [HSC006BG] = "006BG",111 [HSC010BG] = "010BG", [HSC100KA] = "100KA", [HSC160KA] = "160KA",112 [HSC250KA] = "250KA", [HSC400KA] = "400KA", [HSC600KA] = "600KA",113 [HSC001GA] = "001GA", [HSC160LD] = "160LD", [HSC250LD] = "250LD",114 [HSC400LD] = "400LD", [HSC600LD] = "600LD", [HSC001KD] = "001KD",115 [HSC1_6KD] = "1.6KD", [HSC2_5KD] = "2.5KD", [HSC004KD] = "004KD",116 [HSC006KD] = "006KD", [HSC010KD] = "010KD", [HSC016KD] = "016KD",117 [HSC025KD] = "025KD", [HSC040KD] = "040KD", [HSC060KD] = "060KD",118 [HSC100KD] = "100KD", [HSC160KD] = "160KD", [HSC250KD] = "250KD",119 [HSC400KD] = "400KD", [HSC250LG] = "250LG", [HSC400LG] = "400LG",120 [HSC600LG] = "600LG", [HSC001KG] = "001KG", [HSC1_6KG] = "1.6KG",121 [HSC2_5KG] = "2.5KG", [HSC004KG] = "004KG", [HSC006KG] = "006KG",122 [HSC010KG] = "010KG", [HSC016KG] = "016KG", [HSC025KG] = "025KG",123 [HSC040KG] = "040KG", [HSC060KG] = "060KG", [HSC100KG] = "100KG",124 [HSC160KG] = "160KG", [HSC250KG] = "250KG", [HSC400KG] = "400KG",125 [HSC600KG] = "600KG", [HSC001GG] = "001GG", [HSC015PA] = "015PA",126 [HSC030PA] = "030PA", [HSC060PA] = "060PA", [HSC100PA] = "100PA",127 [HSC150PA] = "150PA", [HSC0_5ND] = "0.5ND", [HSC001ND] = "001ND",128 [HSC002ND] = "002ND", [HSC004ND] = "004ND", [HSC005ND] = "005ND",129 [HSC010ND] = "010ND", [HSC020ND] = "020ND", [HSC030ND] = "030ND",130 [HSC001PD] = "001PD", [HSC005PD] = "005PD", [HSC015PD] = "015PD",131 [HSC030PD] = "030PD", [HSC060PD] = "060PD", [HSC001NG] = "001NG",132 [HSC002NG] = "002NG", [HSC004NG] = "004NG", [HSC005NG] = "005NG",133 [HSC010NG] = "010NG", [HSC020NG] = "020NG", [HSC030NG] = "030NG",134 [HSC001PG] = "001PG", [HSC005PG] = "005PG", [HSC015PG] = "015PG",135 [HSC030PG] = "030PG", [HSC060PG] = "060PG", [HSC100PG] = "100PG",136 [HSC150PG] = "150PG",137};138 139/**140 * struct hsc_range_config - list of pressure ranges based on nomenclature141 * @pmin: lowest pressure that can be measured142 * @pmax: highest pressure that can be measured143 */144struct hsc_range_config {145 const s32 pmin;146 const s32 pmax;147};148 149/* All min max limits have been converted to pascals */150static const struct hsc_range_config hsc_range_config[HSC_VARIANTS_MAX] = {151 [HSC001BA] = { .pmin = 0, .pmax = 100000 },152 [HSC1_6BA] = { .pmin = 0, .pmax = 160000 },153 [HSC2_5BA] = { .pmin = 0, .pmax = 250000 },154 [HSC004BA] = { .pmin = 0, .pmax = 400000 },155 [HSC006BA] = { .pmin = 0, .pmax = 600000 },156 [HSC010BA] = { .pmin = 0, .pmax = 1000000 },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 },175 [HSC2_5MG] = { .pmin = 0, .pmax = 250 },176 [HSC004MG] = { .pmin = 0, .pmax = 400 },177 [HSC006MG] = { .pmin = 0, .pmax = 600 },178 [HSC010MG] = { .pmin = 0, .pmax = 1000 },179 [HSC016MG] = { .pmin = 0, .pmax = 1600 },180 [HSC025MG] = { .pmin = 0, .pmax = 2500 },181 [HSC040MG] = { .pmin = 0, .pmax = 4000 },182 [HSC060MG] = { .pmin = 0, .pmax = 6000 },183 [HSC100MG] = { .pmin = 0, .pmax = 10000 },184 [HSC160MG] = { .pmin = 0, .pmax = 16000 },185 [HSC250MG] = { .pmin = 0, .pmax = 25000 },186 [HSC400MG] = { .pmin = 0, .pmax = 40000 },187 [HSC600MG] = { .pmin = 0, .pmax = 60000 },188 [HSC001BG] = { .pmin = 0, .pmax = 100000 },189 [HSC1_6BG] = { .pmin = 0, .pmax = 160000 },190 [HSC2_5BG] = { .pmin = 0, .pmax = 250000 },191 [HSC004BG] = { .pmin = 0, .pmax = 400000 },192 [HSC006BG] = { .pmin = 0, .pmax = 600000 },193 [HSC010BG] = { .pmin = 0, .pmax = 1000000 },194 [HSC100KA] = { .pmin = 0, .pmax = 100000 },195 [HSC160KA] = { .pmin = 0, .pmax = 160000 },196 [HSC250KA] = { .pmin = 0, .pmax = 250000 },197 [HSC400KA] = { .pmin = 0, .pmax = 400000 },198 [HSC600KA] = { .pmin = 0, .pmax = 600000 },199 [HSC001GA] = { .pmin = 0, .pmax = 1000000 },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 },218 [HSC250LG] = { .pmin = 0, .pmax = 250 },219 [HSC400LG] = { .pmin = 0, .pmax = 400 },220 [HSC600LG] = { .pmin = 0, .pmax = 600 },221 [HSC001KG] = { .pmin = 0, .pmax = 1000 },222 [HSC1_6KG] = { .pmin = 0, .pmax = 1600 },223 [HSC2_5KG] = { .pmin = 0, .pmax = 2500 },224 [HSC004KG] = { .pmin = 0, .pmax = 4000 },225 [HSC006KG] = { .pmin = 0, .pmax = 6000 },226 [HSC010KG] = { .pmin = 0, .pmax = 10000 },227 [HSC016KG] = { .pmin = 0, .pmax = 16000 },228 [HSC025KG] = { .pmin = 0, .pmax = 25000 },229 [HSC040KG] = { .pmin = 0, .pmax = 40000 },230 [HSC060KG] = { .pmin = 0, .pmax = 60000 },231 [HSC100KG] = { .pmin = 0, .pmax = 100000 },232 [HSC160KG] = { .pmin = 0, .pmax = 160000 },233 [HSC250KG] = { .pmin = 0, .pmax = 250000 },234 [HSC400KG] = { .pmin = 0, .pmax = 400000 },235 [HSC600KG] = { .pmin = 0, .pmax = 600000 },236 [HSC001GG] = { .pmin = 0, .pmax = 1000000 },237 [HSC015PA] = { .pmin = 0, .pmax = 103421 },238 [HSC030PA] = { .pmin = 0, .pmax = 206843 },239 [HSC060PA] = { .pmin = 0, .pmax = 413685 },240 [HSC100PA] = { .pmin = 0, .pmax = 689476 },241 [HSC150PA] = { .pmin = 0, .pmax = 1034214 },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 },255 [HSC001NG] = { .pmin = 0, .pmax = 249 },256 [HSC002NG] = { .pmin = 0, .pmax = 498 },257 [HSC004NG] = { .pmin = 0, .pmax = 996 },258 [HSC005NG] = { .pmin = 0, .pmax = 1245 },259 [HSC010NG] = { .pmin = 0, .pmax = 2491 },260 [HSC020NG] = { .pmin = 0, .pmax = 4982 },261 [HSC030NG] = { .pmin = 0, .pmax = 7473 },262 [HSC001PG] = { .pmin = 0, .pmax = 6895 },263 [HSC005PG] = { .pmin = 0, .pmax = 34474 },264 [HSC015PG] = { .pmin = 0, .pmax = 103421 },265 [HSC030PG] = { .pmin = 0, .pmax = 206843 },266 [HSC060PG] = { .pmin = 0, .pmax = 413685 },267 [HSC100PG] = { .pmin = 0, .pmax = 689476 },268 [HSC150PG] = { .pmin = 0, .pmax = 1034214 },269};270 271/**272 * hsc_measurement_is_valid() - validate last conversion via status bits273 * @data: structure containing instantiated sensor data274 * Return: true only if both status bits are zero275 *276 * the two MSB from the first transfered byte contain a status code277 * 00 - normal operation, valid data278 * 01 - device in factory programming mode279 * 10 - stale data280 * 11 - diagnostic condition281 */282static bool hsc_measurement_is_valid(struct hsc_data *data)283{284 return !(data->buffer[0] & HSC_STATUS_MASK);285}286 287static int hsc_get_measurement(struct hsc_data *data)288{289 const struct hsc_chip_data *chip = data->chip;290 int ret;291 292 ret = data->recv_cb(data);293 if (ret < 0)294 return ret;295 296 data->is_valid = chip->valid(data);297 if (!data->is_valid)298 return -EAGAIN;299 300 return 0;301}302 303static irqreturn_t hsc_trigger_handler(int irq, void *private)304{305 struct iio_poll_func *pf = private;306 struct iio_dev *indio_dev = pf->indio_dev;307 struct hsc_data *data = iio_priv(indio_dev);308 int ret;309 310 ret = hsc_get_measurement(data);311 if (ret)312 goto error;313 314 memcpy(&data->scan.chan[0], &data->buffer[0], 2);315 memcpy(&data->scan.chan[1], &data->buffer[2], 2);316 317 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,318 iio_get_time_ns(indio_dev));319 320error:321 iio_trigger_notify_done(indio_dev->trig);322 323 return IRQ_HANDLED;324}325 326/*327 * IIO ABI expects328 * value = (conv + offset) * scale329 *330 * datasheet provides the following formula for determining the temperature331 * temp[C] = conv * a + b332 * where a = 200/2047; b = -50333 *334 * temp[C] = (conv + (b/a)) * a * (1000)335 * =>336 * scale = a * 1000 = .097703957 * 1000 = 97.703957337 * offset = b/a = -50 / .097703957 = -50000000 / 97704338 *339 * based on the datasheet340 * pressure = (conv - Omin) * Q + Pmin =341 * ((conv - Omin) + Pmin/Q) * Q342 * =>343 * scale = Q = (Pmax - Pmin) / (Omax - Omin)344 * offset = Pmin/Q - Omin = Pmin * (Omax - Omin) / (Pmax - Pmin) - Omin345 */346static int hsc_read_raw(struct iio_dev *indio_dev,347 struct iio_chan_spec const *channel, int *val,348 int *val2, long mask)349{350 struct hsc_data *data = iio_priv(indio_dev);351 int ret;352 u32 recvd;353 354 switch (mask) {355 case IIO_CHAN_INFO_RAW:356 ret = hsc_get_measurement(data);357 if (ret)358 return ret;359 360 recvd = get_unaligned_be32(data->buffer);361 switch (channel->type) {362 case IIO_PRESSURE:363 *val = FIELD_GET(HSC_PRESSURE_MASK, recvd);364 return IIO_VAL_INT;365 case IIO_TEMP:366 *val = FIELD_GET(HSC_TEMPERATURE_MASK, recvd);367 return IIO_VAL_INT;368 default:369 return -EINVAL;370 }371 372 case IIO_CHAN_INFO_SCALE:373 switch (channel->type) {374 case IIO_TEMP:375 *val = 97;376 *val2 = 703957;377 return IIO_VAL_INT_PLUS_MICRO;378 case IIO_PRESSURE:379 *val = data->p_scale;380 *val2 = data->p_scale_dec;381 return IIO_VAL_INT_PLUS_NANO;382 default:383 return -EINVAL;384 }385 386 case IIO_CHAN_INFO_OFFSET:387 switch (channel->type) {388 case IIO_TEMP:389 *val = -50000000;390 *val2 = 97704;391 return IIO_VAL_FRACTIONAL;392 case IIO_PRESSURE:393 *val = data->p_offset;394 *val2 = data->p_offset_dec;395 return IIO_VAL_INT_PLUS_MICRO;396 default:397 return -EINVAL;398 }399 400 default:401 return -EINVAL;402 }403}404 405static const struct iio_chan_spec hsc_channels[] = {406 {407 .type = IIO_PRESSURE,408 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |409 BIT(IIO_CHAN_INFO_SCALE) |410 BIT(IIO_CHAN_INFO_OFFSET),411 .scan_index = 0,412 .scan_type = {413 .sign = 'u',414 .realbits = 14,415 .storagebits = 16,416 .endianness = IIO_BE,417 },418 },419 {420 .type = IIO_TEMP,421 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |422 BIT(IIO_CHAN_INFO_SCALE) |423 BIT(IIO_CHAN_INFO_OFFSET),424 .scan_index = 1,425 .scan_type = {426 .sign = 'u',427 .realbits = 11,428 .storagebits = 16,429 .shift = 5,430 .endianness = IIO_BE,431 },432 },433 IIO_CHAN_SOFT_TIMESTAMP(2),434};435 436static const struct iio_info hsc_info = {437 .read_raw = hsc_read_raw,438};439 440static const struct hsc_chip_data hsc_chip = {441 .valid = hsc_measurement_is_valid,442 .channels = hsc_channels,443 .num_channels = ARRAY_SIZE(hsc_channels),444};445 446int hsc_common_probe(struct device *dev, hsc_recv_fn recv)447{448 struct hsc_data *hsc;449 struct iio_dev *indio_dev;450 const char *triplet;451 s64 tmp;452 int ret;453 454 indio_dev = devm_iio_device_alloc(dev, sizeof(*hsc));455 if (!indio_dev)456 return -ENOMEM;457 458 hsc = iio_priv(indio_dev);459 460 hsc->chip = &hsc_chip;461 hsc->recv_cb = recv;462 hsc->dev = dev;463 464 ret = device_property_read_u32(dev, "honeywell,transfer-function",465 &hsc->function);466 if (ret)467 return dev_err_probe(dev, ret,468 "honeywell,transfer-function could not be read\n");469 if (hsc->function > HSC_FUNCTION_F)470 return dev_err_probe(dev, -EINVAL,471 "honeywell,transfer-function %d invalid\n",472 hsc->function);473 474 ret = device_property_read_string(dev, "honeywell,pressure-triplet",475 &triplet);476 if (ret)477 return dev_err_probe(dev, ret,478 "honeywell,pressure-triplet could not be read\n");479 480 if (str_has_prefix(triplet, "NA")) {481 ret = device_property_read_u32(dev, "honeywell,pmin-pascal",482 &hsc->pmin);483 if (ret)484 return dev_err_probe(dev, ret,485 "honeywell,pmin-pascal could not be read\n");486 487 ret = device_property_read_u32(dev, "honeywell,pmax-pascal",488 &hsc->pmax);489 if (ret)490 return dev_err_probe(dev, ret,491 "honeywell,pmax-pascal could not be read\n");492 } else {493 ret = device_property_match_property_string(dev,494 "honeywell,pressure-triplet",495 hsc_triplet_variants,496 HSC_VARIANTS_MAX);497 if (ret < 0)498 return dev_err_probe(dev, -EINVAL,499 "honeywell,pressure-triplet is invalid\n");500 501 hsc->pmin = hsc_range_config[ret].pmin;502 hsc->pmax = hsc_range_config[ret].pmax;503 }504 505 if (hsc->pmin >= hsc->pmax)506 return dev_err_probe(dev, -EINVAL,507 "pressure limits are invalid\n");508 509 ret = devm_regulator_get_enable(dev, "vdd");510 if (ret)511 return dev_err_probe(dev, ret, "can't get vdd supply\n");512 513 hsc->outmin = hsc_func_spec[hsc->function].output_min;514 hsc->outmax = hsc_func_spec[hsc->function].output_max;515 516 tmp = div_s64(((s64)(hsc->pmax - hsc->pmin)) * MICRO,517 hsc->outmax - hsc->outmin);518 hsc->p_scale = div_s64_rem(tmp, NANO, &hsc->p_scale_dec);519 tmp = div_s64(((s64)hsc->pmin * (s64)(hsc->outmax - hsc->outmin)) * MICRO,520 hsc->pmax - hsc->pmin);521 tmp -= (s64)hsc->outmin * MICRO;522 hsc->p_offset = div_s64_rem(tmp, MICRO, &hsc->p_offset_dec);523 524 indio_dev->name = "hsc030pa";525 indio_dev->modes = INDIO_DIRECT_MODE;526 indio_dev->info = &hsc_info;527 indio_dev->channels = hsc->chip->channels;528 indio_dev->num_channels = hsc->chip->num_channels;529 530 ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,531 hsc_trigger_handler, NULL);532 if (ret)533 return ret;534 535 return devm_iio_device_register(dev, indio_dev);536}537EXPORT_SYMBOL_NS(hsc_common_probe, IIO_HONEYWELL_HSC030PA);538 539MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");540MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor core driver");541MODULE_LICENSE("GPL");542