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528 529 530 531 532 533 534 535 536 537 538 539 540 541 | // SPDX-License-Identifier: GPL-2.0-only /* * Honeywell TruStability HSC Series pressure/temperature sensor * * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro> * * 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.pdf */ #include <linux/array_size.h> #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/cleanup.h> #include <linux/init.h> #include <linux/math64.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/printk.h> #include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/string.h> #include <linux/types.h> #include <linux/units.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/unaligned.h> #include "hsc030pa.h" /* * HSC_PRESSURE_TRIPLET_LEN - length for the string that defines the * pressure range, measurement unit and type as per the part nomenclature. * Consult honeywell,pressure-triplet in the bindings file for details. */ #define HSC_PRESSURE_TRIPLET_LEN 6 #define HSC_STATUS_MASK GENMASK(7, 6) #define HSC_TEMPERATURE_MASK GENMASK(15, 5) #define HSC_PRESSURE_MASK GENMASK(29, 16) struct hsc_func_spec { u32 output_min; u32 output_max; }; /* * function A: 10% - 90% of 2^14 * function B: 5% - 95% of 2^14 * function C: 5% - 85% of 2^14 * function F: 4% - 94% of 2^14 */ static const struct hsc_func_spec hsc_func_spec[] = { [HSC_FUNCTION_A] = { .output_min = 1638, .output_max = 14746 }, [HSC_FUNCTION_B] = { .output_min = 819, .output_max = 15565 }, [HSC_FUNCTION_C] = { .output_min = 819, .output_max = 13926 }, [HSC_FUNCTION_F] = { .output_min = 655, .output_max = 15401 }, }; enum hsc_variants { HSC001BA = 0x00, HSC1_6BA = 0x01, HSC2_5BA = 0x02, HSC004BA = 0x03, HSC006BA = 0x04, HSC010BA = 0x05, HSC1_6MD = 0x06, HSC2_5MD = 0x07, HSC004MD = 0x08, HSC006MD = 0x09, HSC010MD = 0x0a, HSC016MD = 0x0b, HSC025MD = 0x0c, HSC040MD = 0x0d, HSC060MD = 0x0e, HSC100MD = 0x0f, HSC160MD = 0x10, HSC250MD = 0x11, HSC400MD = 0x12, HSC600MD = 0x13, HSC001BD = 0x14, HSC1_6BD = 0x15, HSC2_5BD = 0x16, HSC004BD = 0x17, HSC2_5MG = 0x18, HSC004MG = 0x19, HSC006MG = 0x1a, HSC010MG = 0x1b, HSC016MG = 0x1c, HSC025MG = 0x1d, HSC040MG = 0x1e, HSC060MG = 0x1f, HSC100MG = 0x20, HSC160MG = 0x21, HSC250MG = 0x22, HSC400MG = 0x23, HSC600MG = 0x24, HSC001BG = 0x25, HSC1_6BG = 0x26, HSC2_5BG = 0x27, HSC004BG = 0x28, HSC006BG = 0x29, HSC010BG = 0x2a, HSC100KA = 0x2b, HSC160KA = 0x2c, HSC250KA = 0x2d, HSC400KA = 0x2e, HSC600KA = 0x2f, HSC001GA = 0x30, HSC160LD = 0x31, HSC250LD = 0x32, HSC400LD = 0x33, HSC600LD = 0x34, HSC001KD = 0x35, HSC1_6KD = 0x36, HSC2_5KD = 0x37, HSC004KD = 0x38, HSC006KD = 0x39, HSC010KD = 0x3a, HSC016KD = 0x3b, HSC025KD = 0x3c, HSC040KD = 0x3d, HSC060KD = 0x3e, HSC100KD = 0x3f, HSC160KD = 0x40, HSC250KD = 0x41, HSC400KD = 0x42, HSC250LG = 0x43, HSC400LG = 0x44, HSC600LG = 0x45, HSC001KG = 0x46, HSC1_6KG = 0x47, HSC2_5KG = 0x48, HSC004KG = 0x49, HSC006KG = 0x4a, HSC010KG = 0x4b, HSC016KG = 0x4c, HSC025KG = 0x4d, HSC040KG = 0x4e, HSC060KG = 0x4f, HSC100KG = 0x50, HSC160KG = 0x51, HSC250KG = 0x52, HSC400KG = 0x53, HSC600KG = 0x54, HSC001GG = 0x55, HSC015PA = 0x56, HSC030PA = 0x57, HSC060PA = 0x58, HSC100PA = 0x59, HSC150PA = 0x5a, HSC0_5ND = 0x5b, HSC001ND = 0x5c, HSC002ND = 0x5d, HSC004ND = 0x5e, HSC005ND = 0x5f, HSC010ND = 0x60, HSC020ND = 0x61, HSC030ND = 0x62, HSC001PD = 0x63, HSC005PD = 0x64, HSC015PD = 0x65, HSC030PD = 0x66, HSC060PD = 0x67, HSC001NG = 0x68, HSC002NG = 0x69, HSC004NG = 0x6a, HSC005NG = 0x6b, HSC010NG = 0x6c, HSC020NG = 0x6d, HSC030NG = 0x6e, HSC001PG = 0x6f, HSC005PG = 0x70, HSC015PG = 0x71, HSC030PG = 0x72, HSC060PG = 0x73, HSC100PG = 0x74, HSC150PG = 0x75, HSC_VARIANTS_MAX }; static const char * const hsc_triplet_variants[HSC_VARIANTS_MAX] = { [HSC001BA] = "001BA", [HSC1_6BA] = "1.6BA", [HSC2_5BA] = "2.5BA", [HSC004BA] = "004BA", [HSC006BA] = "006BA", [HSC010BA] = "010BA", [HSC1_6MD] = "1.6MD", [HSC2_5MD] = "2.5MD", [HSC004MD] = "004MD", [HSC006MD] = "006MD", [HSC010MD] = "010MD", [HSC016MD] = "016MD", [HSC025MD] = "025MD", [HSC040MD] = "040MD", [HSC060MD] = "060MD", [HSC100MD] = "100MD", [HSC160MD] = "160MD", [HSC250MD] = "250MD", [HSC400MD] = "400MD", [HSC600MD] = "600MD", [HSC001BD] = "001BD", [HSC1_6BD] = "1.6BD", [HSC2_5BD] = "2.5BD", [HSC004BD] = "004BD", [HSC2_5MG] = "2.5MG", [HSC004MG] = "004MG", [HSC006MG] = "006MG", [HSC010MG] = "010MG", [HSC016MG] = "016MG", [HSC025MG] = "025MG", [HSC040MG] = "040MG", [HSC060MG] = "060MG", [HSC100MG] = "100MG", [HSC160MG] = "160MG", [HSC250MG] = "250MG", [HSC400MG] = "400MG", [HSC600MG] = "600MG", [HSC001BG] = "001BG", [HSC1_6BG] = "1.6BG", [HSC2_5BG] = "2.5BG", [HSC004BG] = "004BG", [HSC006BG] = "006BG", [HSC010BG] = "010BG", [HSC100KA] = "100KA", [HSC160KA] = "160KA", [HSC250KA] = "250KA", [HSC400KA] = "400KA", [HSC600KA] = "600KA", [HSC001GA] = "001GA", [HSC160LD] = "160LD", [HSC250LD] = "250LD", [HSC400LD] = "400LD", [HSC600LD] = "600LD", [HSC001KD] = "001KD", [HSC1_6KD] = "1.6KD", [HSC2_5KD] = "2.5KD", [HSC004KD] = "004KD", [HSC006KD] = "006KD", [HSC010KD] = "010KD", [HSC016KD] = "016KD", [HSC025KD] = "025KD", [HSC040KD] = "040KD", [HSC060KD] = "060KD", [HSC100KD] = "100KD", [HSC160KD] = "160KD", [HSC250KD] = "250KD", [HSC400KD] = "400KD", [HSC250LG] = "250LG", [HSC400LG] = "400LG", [HSC600LG] = "600LG", [HSC001KG] = "001KG", [HSC1_6KG] = "1.6KG", [HSC2_5KG] = "2.5KG", [HSC004KG] = "004KG", [HSC006KG] = "006KG", [HSC010KG] = "010KG", [HSC016KG] = "016KG", [HSC025KG] = "025KG", [HSC040KG] = "040KG", [HSC060KG] = "060KG", [HSC100KG] = "100KG", [HSC160KG] = "160KG", [HSC250KG] = "250KG", [HSC400KG] = "400KG", [HSC600KG] = "600KG", [HSC001GG] = "001GG", [HSC015PA] = "015PA", [HSC030PA] = "030PA", [HSC060PA] = "060PA", [HSC100PA] = "100PA", [HSC150PA] = "150PA", [HSC0_5ND] = "0.5ND", [HSC001ND] = "001ND", [HSC002ND] = "002ND", [HSC004ND] = "004ND", [HSC005ND] = "005ND", [HSC010ND] = "010ND", [HSC020ND] = "020ND", [HSC030ND] = "030ND", [HSC001PD] = "001PD", [HSC005PD] = "005PD", [HSC015PD] = "015PD", [HSC030PD] = "030PD", [HSC060PD] = "060PD", [HSC001NG] = "001NG", [HSC002NG] = "002NG", [HSC004NG] = "004NG", [HSC005NG] = "005NG", [HSC010NG] = "010NG", [HSC020NG] = "020NG", [HSC030NG] = "030NG", [HSC001PG] = "001PG", [HSC005PG] = "005PG", [HSC015PG] = "015PG", [HSC030PG] = "030PG", [HSC060PG] = "060PG", [HSC100PG] = "100PG", [HSC150PG] = "150PG", }; /** * struct hsc_range_config - list of pressure ranges based on nomenclature * @pmin: lowest pressure that can be measured * @pmax: highest pressure that can be measured */ struct hsc_range_config { const s32 pmin; const s32 pmax; }; /* All min max limits have been converted to pascals */ static const struct hsc_range_config hsc_range_config[HSC_VARIANTS_MAX] = { [HSC001BA] = { .pmin = 0, .pmax = 100000 }, [HSC1_6BA] = { .pmin = 0, .pmax = 160000 }, [HSC2_5BA] = { .pmin = 0, .pmax = 250000 }, [HSC004BA] = { .pmin = 0, .pmax = 400000 }, [HSC006BA] = { .pmin = 0, .pmax = 600000 }, [HSC010BA] = { .pmin = 0, .pmax = 1000000 }, [HSC1_6MD] = { .pmin = -160, .pmax = 160 }, [HSC2_5MD] = { .pmin = -250, .pmax = 250 }, [HSC004MD] = { .pmin = -400, .pmax = 400 }, [HSC006MD] = { .pmin = -600, .pmax = 600 }, [HSC010MD] = { .pmin = -1000, .pmax = 1000 }, [HSC016MD] = { .pmin = -1600, .pmax = 1600 }, [HSC025MD] = { .pmin = -2500, .pmax = 2500 }, [HSC040MD] = { .pmin = -4000, .pmax = 4000 }, [HSC060MD] = { .pmin = -6000, .pmax = 6000 }, [HSC100MD] = { .pmin = -10000, .pmax = 10000 }, [HSC160MD] = { .pmin = -16000, .pmax = 16000 }, [HSC250MD] = { .pmin = -25000, .pmax = 25000 }, [HSC400MD] = { .pmin = -40000, .pmax = 40000 }, [HSC600MD] = { .pmin = -60000, .pmax = 60000 }, [HSC001BD] = { .pmin = -100000, .pmax = 100000 }, [HSC1_6BD] = { .pmin = -160000, .pmax = 160000 }, [HSC2_5BD] = { .pmin = -250000, .pmax = 250000 }, [HSC004BD] = { .pmin = -400000, .pmax = 400000 }, [HSC2_5MG] = { .pmin = 0, .pmax = 250 }, [HSC004MG] = { .pmin = 0, .pmax = 400 }, [HSC006MG] = { .pmin = 0, .pmax = 600 }, [HSC010MG] = { .pmin = 0, .pmax = 1000 }, [HSC016MG] = { .pmin = 0, .pmax = 1600 }, [HSC025MG] = { .pmin = 0, .pmax = 2500 }, [HSC040MG] = { .pmin = 0, .pmax = 4000 }, [HSC060MG] = { .pmin = 0, .pmax = 6000 }, [HSC100MG] = { .pmin = 0, .pmax = 10000 }, [HSC160MG] = { .pmin = 0, .pmax = 16000 }, [HSC250MG] = { .pmin = 0, .pmax = 25000 }, [HSC400MG] = { .pmin = 0, .pmax = 40000 }, [HSC600MG] = { .pmin = 0, .pmax = 60000 }, [HSC001BG] = { .pmin = 0, .pmax = 100000 }, [HSC1_6BG] = { .pmin = 0, .pmax = 160000 }, [HSC2_5BG] = { .pmin = 0, .pmax = 250000 }, [HSC004BG] = { .pmin = 0, .pmax = 400000 }, [HSC006BG] = { .pmin = 0, .pmax = 600000 }, [HSC010BG] = { .pmin = 0, .pmax = 1000000 }, [HSC100KA] = { .pmin = 0, .pmax = 100000 }, [HSC160KA] = { .pmin = 0, .pmax = 160000 }, [HSC250KA] = { .pmin = 0, .pmax = 250000 }, [HSC400KA] = { .pmin = 0, .pmax = 400000 }, [HSC600KA] = { .pmin = 0, .pmax = 600000 }, [HSC001GA] = { .pmin = 0, .pmax = 1000000 }, [HSC160LD] = { .pmin = -160, .pmax = 160 }, [HSC250LD] = { .pmin = -250, .pmax = 250 }, [HSC400LD] = { .pmin = -400, .pmax = 400 }, [HSC600LD] = { .pmin = -600, .pmax = 600 }, [HSC001KD] = { .pmin = -1000, .pmax = 1000 }, [HSC1_6KD] = { .pmin = -1600, .pmax = 1600 }, [HSC2_5KD] = { .pmin = -2500, .pmax = 2500 }, [HSC004KD] = { .pmin = -4000, .pmax = 4000 }, [HSC006KD] = { .pmin = -6000, .pmax = 6000 }, [HSC010KD] = { .pmin = -10000, .pmax = 10000 }, [HSC016KD] = { .pmin = -16000, .pmax = 16000 }, [HSC025KD] = { .pmin = -25000, .pmax = 25000 }, [HSC040KD] = { .pmin = -40000, .pmax = 40000 }, [HSC060KD] = { .pmin = -60000, .pmax = 60000 }, [HSC100KD] = { .pmin = -100000, .pmax = 100000 }, [HSC160KD] = { .pmin = -160000, .pmax = 160000 }, [HSC250KD] = { .pmin = -250000, .pmax = 250000 }, [HSC400KD] = { .pmin = -400000, .pmax = 400000 }, [HSC250LG] = { .pmin = 0, .pmax = 250 }, [HSC400LG] = { .pmin = 0, .pmax = 400 }, [HSC600LG] = { .pmin = 0, .pmax = 600 }, [HSC001KG] = { .pmin = 0, .pmax = 1000 }, [HSC1_6KG] = { .pmin = 0, .pmax = 1600 }, [HSC2_5KG] = { .pmin = 0, .pmax = 2500 }, [HSC004KG] = { .pmin = 0, .pmax = 4000 }, [HSC006KG] = { .pmin = 0, .pmax = 6000 }, [HSC010KG] = { .pmin = 0, .pmax = 10000 }, [HSC016KG] = { .pmin = 0, .pmax = 16000 }, [HSC025KG] = { .pmin = 0, .pmax = 25000 }, [HSC040KG] = { .pmin = 0, .pmax = 40000 }, [HSC060KG] = { .pmin = 0, .pmax = 60000 }, [HSC100KG] = { .pmin = 0, .pmax = 100000 }, [HSC160KG] = { .pmin = 0, .pmax = 160000 }, [HSC250KG] = { .pmin = 0, .pmax = 250000 }, [HSC400KG] = { .pmin = 0, .pmax = 400000 }, [HSC600KG] = { .pmin = 0, .pmax = 600000 }, [HSC001GG] = { .pmin = 0, .pmax = 1000000 }, [HSC015PA] = { .pmin = 0, .pmax = 103421 }, [HSC030PA] = { .pmin = 0, .pmax = 206843 }, [HSC060PA] = { .pmin = 0, .pmax = 413685 }, [HSC100PA] = { .pmin = 0, .pmax = 689476 }, [HSC150PA] = { .pmin = 0, .pmax = 1034214 }, [HSC0_5ND] = { .pmin = -125, .pmax = 125 }, [HSC001ND] = { .pmin = -249, .pmax = 249 }, [HSC002ND] = { .pmin = -498, .pmax = 498 }, [HSC004ND] = { .pmin = -996, .pmax = 996 }, [HSC005ND] = { .pmin = -1245, .pmax = 1245 }, [HSC010ND] = { .pmin = -2491, .pmax = 2491 }, [HSC020ND] = { .pmin = -4982, .pmax = 4982 }, [HSC030ND] = { .pmin = -7473, .pmax = 7473 }, [HSC001PD] = { .pmin = -6895, .pmax = 6895 }, [HSC005PD] = { .pmin = -34474, .pmax = 34474 }, [HSC015PD] = { .pmin = -103421, .pmax = 103421 }, [HSC030PD] = { .pmin = -206843, .pmax = 206843 }, [HSC060PD] = { .pmin = -413685, .pmax = 413685 }, [HSC001NG] = { .pmin = 0, .pmax = 249 }, [HSC002NG] = { .pmin = 0, .pmax = 498 }, [HSC004NG] = { .pmin = 0, .pmax = 996 }, [HSC005NG] = { .pmin = 0, .pmax = 1245 }, [HSC010NG] = { .pmin = 0, .pmax = 2491 }, [HSC020NG] = { .pmin = 0, .pmax = 4982 }, [HSC030NG] = { .pmin = 0, .pmax = 7473 }, [HSC001PG] = { .pmin = 0, .pmax = 6895 }, [HSC005PG] = { .pmin = 0, .pmax = 34474 }, [HSC015PG] = { .pmin = 0, .pmax = 103421 }, [HSC030PG] = { .pmin = 0, .pmax = 206843 }, [HSC060PG] = { .pmin = 0, .pmax = 413685 }, [HSC100PG] = { .pmin = 0, .pmax = 689476 }, [HSC150PG] = { .pmin = 0, .pmax = 1034214 }, }; /** * hsc_measurement_is_valid() - validate last conversion via status bits * @data: structure containing instantiated sensor data * Return: true only if both status bits are zero * * the two MSB from the first transfered byte contain a status code * 00 - normal operation, valid data * 01 - device in factory programming mode * 10 - stale data * 11 - diagnostic condition */ static bool hsc_measurement_is_valid(struct hsc_data *data) { return !(data->buffer[0] & HSC_STATUS_MASK); } static int hsc_get_measurement(struct hsc_data *data) { const struct hsc_chip_data *chip = data->chip; int ret; ret = data->recv_cb(data); if (ret < 0) return ret; data->is_valid = chip->valid(data); if (!data->is_valid) return -EAGAIN; return 0; } static irqreturn_t hsc_trigger_handler(int irq, void *private) { struct iio_poll_func *pf = private; struct iio_dev *indio_dev = pf->indio_dev; struct hsc_data *data = iio_priv(indio_dev); int ret; ret = hsc_get_measurement(data); if (ret) goto error; memcpy(&data->scan.chan[0], &data->buffer[0], 2); memcpy(&data->scan.chan[1], &data->buffer[2], 2); iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, iio_get_time_ns(indio_dev)); error: iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } /* * IIO ABI expects * value = (conv + offset) * scale * * datasheet provides the following formula for determining the temperature * temp[C] = conv * a + b * where a = 200/2047; b = -50 * * temp[C] = (conv + (b/a)) * a * (1000) * => * scale = a * 1000 = .097703957 * 1000 = 97.703957 * offset = b/a = -50 / .097703957 = -50000000 / 97704 * * based on the datasheet * pressure = (conv - Omin) * Q + Pmin = * ((conv - Omin) + Pmin/Q) * Q * => * scale = Q = (Pmax - Pmin) / (Omax - Omin) * offset = Pmin/Q - Omin = Pmin * (Omax - Omin) / (Pmax - Pmin) - Omin */ static int hsc_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *channel, int *val, int *val2, long mask) { struct hsc_data *data = iio_priv(indio_dev); int ret; u32 recvd; switch (mask) { case IIO_CHAN_INFO_RAW: ret = hsc_get_measurement(data); if (ret) return ret; recvd = get_unaligned_be32(data->buffer); switch (channel->type) { case IIO_PRESSURE: *val = FIELD_GET(HSC_PRESSURE_MASK, recvd); return IIO_VAL_INT; case IIO_TEMP: *val = FIELD_GET(HSC_TEMPERATURE_MASK, recvd); return IIO_VAL_INT; default: return -EINVAL; } case IIO_CHAN_INFO_SCALE: switch (channel->type) { case IIO_TEMP: *val = 97; *val2 = 703957; return IIO_VAL_INT_PLUS_MICRO; case IIO_PRESSURE: *val = data->p_scale; *val2 = data->p_scale_dec; return IIO_VAL_INT_PLUS_NANO; default: return -EINVAL; } case IIO_CHAN_INFO_OFFSET: switch (channel->type) { case IIO_TEMP: *val = -50000000; *val2 = 97704; return IIO_VAL_FRACTIONAL; case IIO_PRESSURE: *val = data->p_offset; *val2 = data->p_offset_dec; return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } default: return -EINVAL; } } static const struct iio_chan_spec hsc_channels[] = { { .type = IIO_PRESSURE, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), .scan_index = 0, .scan_type = { .sign = 'u', .realbits = 14, .storagebits = 16, .endianness = IIO_BE, }, }, { .type = IIO_TEMP, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), .scan_index = 1, .scan_type = { .sign = 'u', .realbits = 11, .storagebits = 16, .shift = 5, .endianness = IIO_BE, }, }, IIO_CHAN_SOFT_TIMESTAMP(2), }; static const struct iio_info hsc_info = { .read_raw = hsc_read_raw, }; static const struct hsc_chip_data hsc_chip = { .valid = hsc_measurement_is_valid, .channels = hsc_channels, .num_channels = ARRAY_SIZE(hsc_channels), }; int hsc_common_probe(struct device *dev, hsc_recv_fn recv) { struct hsc_data *hsc; struct iio_dev *indio_dev; const char *triplet; s64 tmp; int ret; indio_dev = devm_iio_device_alloc(dev, sizeof(*hsc)); if (!indio_dev) return -ENOMEM; hsc = iio_priv(indio_dev); hsc->chip = &hsc_chip; hsc->recv_cb = recv; hsc->dev = dev; ret = device_property_read_u32(dev, "honeywell,transfer-function", &hsc->function); if (ret) return dev_err_probe(dev, ret, "honeywell,transfer-function could not be read\n"); if (hsc->function > HSC_FUNCTION_F) return dev_err_probe(dev, -EINVAL, "honeywell,transfer-function %d invalid\n", hsc->function); ret = device_property_read_string(dev, "honeywell,pressure-triplet", &triplet); if (ret) return dev_err_probe(dev, ret, "honeywell,pressure-triplet could not be read\n"); if (str_has_prefix(triplet, "NA")) { ret = device_property_read_u32(dev, "honeywell,pmin-pascal", &hsc->pmin); if (ret) return dev_err_probe(dev, ret, "honeywell,pmin-pascal could not be read\n"); ret = device_property_read_u32(dev, "honeywell,pmax-pascal", &hsc->pmax); if (ret) return dev_err_probe(dev, ret, "honeywell,pmax-pascal could not be read\n"); } else { ret = device_property_match_property_string(dev, "honeywell,pressure-triplet", hsc_triplet_variants, HSC_VARIANTS_MAX); if (ret < 0) return dev_err_probe(dev, -EINVAL, "honeywell,pressure-triplet is invalid\n"); hsc->pmin = hsc_range_config[ret].pmin; hsc->pmax = hsc_range_config[ret].pmax; } if (hsc->pmin >= hsc->pmax) return dev_err_probe(dev, -EINVAL, "pressure limits are invalid\n"); ret = devm_regulator_get_enable(dev, "vdd"); if (ret) return dev_err_probe(dev, ret, "can't get vdd supply\n"); hsc->outmin = hsc_func_spec[hsc->function].output_min; hsc->outmax = hsc_func_spec[hsc->function].output_max; tmp = div_s64(((s64)(hsc->pmax - hsc->pmin)) * MICRO, hsc->outmax - hsc->outmin); hsc->p_scale = div_s64_rem(tmp, NANO, &hsc->p_scale_dec); tmp = div_s64(((s64)hsc->pmin * (s64)(hsc->outmax - hsc->outmin)) * MICRO, hsc->pmax - hsc->pmin); tmp -= (s64)hsc->outmin * MICRO; hsc->p_offset = div_s64_rem(tmp, MICRO, &hsc->p_offset_dec); indio_dev->name = "hsc030pa"; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &hsc_info; indio_dev->channels = hsc->chip->channels; indio_dev->num_channels = hsc->chip->num_channels; ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, hsc_trigger_handler, NULL); if (ret) return ret; return devm_iio_device_register(dev, indio_dev); } EXPORT_SYMBOL_NS(hsc_common_probe, IIO_HONEYWELL_HSC030PA); MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>"); MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor core driver"); MODULE_LICENSE("GPL"); |