// SPDX-License-Identifier: GPL-2.0-or-later /* * Honeywell ABP2 series pressure sensor driver * * Copyright (c) 2025 Petre Rodan * * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/basic-abp2-series/documents/sps-siot-abp2-series-datasheet-32350268-en.pdf */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "abp2030pa.h" /* Status byte flags */ #define ABP2_ST_POWER BIT(6) /* 1 if device is powered */ #define ABP2_ST_BUSY BIT(5) /* 1 if device is busy */ #define ABP2_CMD_NOP 0xf0 #define ABP2_CMD_SYNC 0xaa #define ABP2_PKT_SYNC_LEN 3 #define ABP2_PKT_NOP_LEN ABP2_MEASUREMENT_RD_SIZE struct abp2_func_spec { u32 output_min; u32 output_max; }; /* transfer function A: 10% to 90% of 2^24 */ static const struct abp2_func_spec abp2_func_spec[] = { [ABP2_FUNCTION_A] = { .output_min = 1677722, .output_max = 15099494 }, }; enum abp2_variants { ABP2001BA, ABP21_6BA, ABP22_5BA, ABP2004BA, ABP2006BA, ABP2008BA, ABP2010BA, ABP2012BA, ABP2001BD, ABP21_6BD, ABP22_5BD, ABP2004BD, ABP2001BG, ABP21_6BG, ABP22_5BG, ABP2004BG, ABP2006BG, ABP2008BG, ABP2010BG, ABP2012BG, ABP2001GG, ABP21_2GG, ABP2100KA, ABP2160KA, ABP2250KA, ABP2001KD, ABP21_6KD, ABP22_5KD, ABP2004KD, ABP2006KD, ABP2010KD, ABP2016KD, ABP2025KD, ABP2040KD, ABP2060KD, ABP2100KD, ABP2160KD, ABP2250KD, ABP2400KD, ABP2001KG, ABP21_6KG, ABP22_5KG, ABP2004KG, ABP2006KG, ABP2010KG, ABP2016KG, ABP2025KG, ABP2040KG, ABP2060KG, ABP2100KG, ABP2160KG, ABP2250KG, ABP2400KG, ABP2600KG, ABP2800KG, ABP2250LD, ABP2600LD, ABP2600LG, ABP22_5MD, ABP2006MD, ABP2010MD, ABP2016MD, ABP2025MD, ABP2040MD, ABP2060MD, ABP2100MD, ABP2160MD, ABP2250MD, ABP2400MD, ABP2600MD, ABP2006MG, ABP2010MG, ABP2016MG, ABP2025MG, ABP2040MG, ABP2060MG, ABP2100MG, ABP2160MG, ABP2250MG, ABP2400MG, ABP2600MG, ABP2001ND, ABP2002ND, ABP2004ND, ABP2005ND, ABP2010ND, ABP2020ND, ABP2030ND, ABP2002NG, ABP2004NG, ABP2005NG, ABP2010NG, ABP2020NG, ABP2030NG, ABP2015PA, ABP2030PA, ABP2060PA, ABP2100PA, ABP2150PA, ABP2175PA, ABP2001PD, ABP2005PD, ABP2015PD, ABP2030PD, ABP2060PD, ABP2001PG, ABP2005PG, ABP2015PG, ABP2030PG, ABP2060PG, ABP2100PG, ABP2150PG, ABP2175PG, }; static const char * const abp2_triplet_variants[] = { [ABP2001BA] = "001BA", [ABP21_6BA] = "1.6BA", [ABP22_5BA] = "2.5BA", [ABP2004BA] = "004BA", [ABP2006BA] = "006BA", [ABP2008BA] = "008BA", [ABP2010BA] = "010BA", [ABP2012BA] = "012BA", [ABP2001BD] = "001BD", [ABP21_6BD] = "1.6BD", [ABP22_5BD] = "2.5BD", [ABP2004BD] = "004BD", [ABP2001BG] = "001BG", [ABP21_6BG] = "1.6BG", [ABP22_5BG] = "2.5BG", [ABP2004BG] = "004BG", [ABP2006BG] = "006BG", [ABP2008BG] = "008BG", [ABP2010BG] = "010BG", [ABP2012BG] = "012BG", [ABP2001GG] = "001GG", [ABP21_2GG] = "1.2GG", [ABP2100KA] = "100KA", [ABP2160KA] = "160KA", [ABP2250KA] = "250KA", [ABP2001KD] = "001KD", [ABP21_6KD] = "1.6KD", [ABP22_5KD] = "2.5KD", [ABP2004KD] = "004KD", [ABP2006KD] = "006KD", [ABP2010KD] = "010KD", [ABP2016KD] = "016KD", [ABP2025KD] = "025KD", [ABP2040KD] = "040KD", [ABP2060KD] = "060KD", [ABP2100KD] = "100KD", [ABP2160KD] = "160KD", [ABP2250KD] = "250KD", [ABP2400KD] = "400KD", [ABP2001KG] = "001KG", [ABP21_6KG] = "1.6KG", [ABP22_5KG] = "2.5KG", [ABP2004KG] = "004KG", [ABP2006KG] = "006KG", [ABP2010KG] = "010KG", [ABP2016KG] = "016KG", [ABP2025KG] = "025KG", [ABP2040KG] = "040KG", [ABP2060KG] = "060KG", [ABP2100KG] = "100KG", [ABP2160KG] = "160KG", [ABP2250KG] = "250KG", [ABP2400KG] = "400KG", [ABP2600KG] = "600KG", [ABP2800KG] = "800KG", [ABP2250LD] = "250LD", [ABP2600LD] = "600LD", [ABP2600LG] = "600LG", [ABP22_5MD] = "2.5MD", [ABP2006MD] = "006MD", [ABP2010MD] = "010MD", [ABP2016MD] = "016MD", [ABP2025MD] = "025MD", [ABP2040MD] = "040MD", [ABP2060MD] = "060MD", [ABP2100MD] = "100MD", [ABP2160MD] = "160MD", [ABP2250MD] = "250MD", [ABP2400MD] = "400MD", [ABP2600MD] = "600MD", [ABP2006MG] = "006MG", [ABP2010MG] = "010MG", [ABP2016MG] = "016MG", [ABP2025MG] = "025MG", [ABP2040MG] = "040MG", [ABP2060MG] = "060MG", [ABP2100MG] = "100MG", [ABP2160MG] = "160MG", [ABP2250MG] = "250MG", [ABP2400MG] = "400MG", [ABP2600MG] = "600MG", [ABP2001ND] = "001ND", [ABP2002ND] = "002ND", [ABP2004ND] = "004ND", [ABP2005ND] = "005ND", [ABP2010ND] = "010ND", [ABP2020ND] = "020ND", [ABP2030ND] = "030ND", [ABP2002NG] = "002NG", [ABP2004NG] = "004NG", [ABP2005NG] = "005NG", [ABP2010NG] = "010NG", [ABP2020NG] = "020NG", [ABP2030NG] = "030NG", [ABP2015PA] = "015PA", [ABP2030PA] = "030PA", [ABP2060PA] = "060PA", [ABP2100PA] = "100PA", [ABP2150PA] = "150PA", [ABP2175PA] = "175PA", [ABP2001PD] = "001PD", [ABP2005PD] = "005PD", [ABP2015PD] = "015PD", [ABP2030PD] = "030PD", [ABP2060PD] = "060PD", [ABP2001PG] = "001PG", [ABP2005PG] = "005PG", [ABP2015PG] = "015PG", [ABP2030PG] = "030PG", [ABP2060PG] = "060PG", [ABP2100PG] = "100PG", [ABP2150PG] = "150PG", [ABP2175PG] = "175PG", }; /** * struct abp2_range_config - list of pressure ranges based on nomenclature * @pmin: lowest pressure that can be measured * @pmax: highest pressure that can be measured */ struct abp2_range_config { s32 pmin; s32 pmax; }; /* All min max limits have been converted to pascals */ static const struct abp2_range_config abp2_range_config[] = { [ABP2001BA] = { .pmin = 0, .pmax = 100000 }, [ABP21_6BA] = { .pmin = 0, .pmax = 160000 }, [ABP22_5BA] = { .pmin = 0, .pmax = 250000 }, [ABP2004BA] = { .pmin = 0, .pmax = 400000 }, [ABP2006BA] = { .pmin = 0, .pmax = 600000 }, [ABP2008BA] = { .pmin = 0, .pmax = 800000 }, [ABP2010BA] = { .pmin = 0, .pmax = 1000000 }, [ABP2012BA] = { .pmin = 0, .pmax = 1200000 }, [ABP2001BD] = { .pmin = -100000, .pmax = 100000 }, [ABP21_6BD] = { .pmin = -160000, .pmax = 160000 }, [ABP22_5BD] = { .pmin = -250000, .pmax = 250000 }, [ABP2004BD] = { .pmin = -400000, .pmax = 400000 }, [ABP2001BG] = { .pmin = 0, .pmax = 100000 }, [ABP21_6BG] = { .pmin = 0, .pmax = 160000 }, [ABP22_5BG] = { .pmin = 0, .pmax = 250000 }, [ABP2004BG] = { .pmin = 0, .pmax = 400000 }, [ABP2006BG] = { .pmin = 0, .pmax = 600000 }, [ABP2008BG] = { .pmin = 0, .pmax = 800000 }, [ABP2010BG] = { .pmin = 0, .pmax = 1000000 }, [ABP2012BG] = { .pmin = 0, .pmax = 1200000 }, [ABP2001GG] = { .pmin = 0, .pmax = 1000000 }, [ABP21_2GG] = { .pmin = 0, .pmax = 1200000 }, [ABP2100KA] = { .pmin = 0, .pmax = 100000 }, [ABP2160KA] = { .pmin = 0, .pmax = 160000 }, [ABP2250KA] = { .pmin = 0, .pmax = 250000 }, [ABP2001KD] = { .pmin = -1000, .pmax = 1000 }, [ABP21_6KD] = { .pmin = -1600, .pmax = 1600 }, [ABP22_5KD] = { .pmin = -2500, .pmax = 2500 }, [ABP2004KD] = { .pmin = -4000, .pmax = 4000 }, [ABP2006KD] = { .pmin = -6000, .pmax = 6000 }, [ABP2010KD] = { .pmin = -10000, .pmax = 10000 }, [ABP2016KD] = { .pmin = -16000, .pmax = 16000 }, [ABP2025KD] = { .pmin = -25000, .pmax = 25000 }, [ABP2040KD] = { .pmin = -40000, .pmax = 40000 }, [ABP2060KD] = { .pmin = -60000, .pmax = 60000 }, [ABP2100KD] = { .pmin = -100000, .pmax = 100000 }, [ABP2160KD] = { .pmin = -160000, .pmax = 160000 }, [ABP2250KD] = { .pmin = -250000, .pmax = 250000 }, [ABP2400KD] = { .pmin = -400000, .pmax = 400000 }, [ABP2001KG] = { .pmin = 0, .pmax = 1000 }, [ABP21_6KG] = { .pmin = 0, .pmax = 1600 }, [ABP22_5KG] = { .pmin = 0, .pmax = 2500 }, [ABP2004KG] = { .pmin = 0, .pmax = 4000 }, [ABP2006KG] = { .pmin = 0, .pmax = 6000 }, [ABP2010KG] = { .pmin = 0, .pmax = 10000 }, [ABP2016KG] = { .pmin = 0, .pmax = 16000 }, [ABP2025KG] = { .pmin = 0, .pmax = 25000 }, [ABP2040KG] = { .pmin = 0, .pmax = 40000 }, [ABP2060KG] = { .pmin = 0, .pmax = 60000 }, [ABP2100KG] = { .pmin = 0, .pmax = 100000 }, [ABP2160KG] = { .pmin = 0, .pmax = 160000 }, [ABP2250KG] = { .pmin = 0, .pmax = 250000 }, [ABP2400KG] = { .pmin = 0, .pmax = 400000 }, [ABP2600KG] = { .pmin = 0, .pmax = 600000 }, [ABP2800KG] = { .pmin = 0, .pmax = 800000 }, [ABP2250LD] = { .pmin = -250, .pmax = 250 }, [ABP2600LD] = { .pmin = -600, .pmax = 600 }, [ABP2600LG] = { .pmin = 0, .pmax = 600 }, [ABP22_5MD] = { .pmin = -250, .pmax = 250 }, [ABP2006MD] = { .pmin = -600, .pmax = 600 }, [ABP2010MD] = { .pmin = -1000, .pmax = 1000 }, [ABP2016MD] = { .pmin = -1600, .pmax = 1600 }, [ABP2025MD] = { .pmin = -2500, .pmax = 2500 }, [ABP2040MD] = { .pmin = -4000, .pmax = 4000 }, [ABP2060MD] = { .pmin = -6000, .pmax = 6000 }, [ABP2100MD] = { .pmin = -10000, .pmax = 10000 }, [ABP2160MD] = { .pmin = -16000, .pmax = 16000 }, [ABP2250MD] = { .pmin = -25000, .pmax = 25000 }, [ABP2400MD] = { .pmin = -40000, .pmax = 40000 }, [ABP2600MD] = { .pmin = -60000, .pmax = 60000 }, [ABP2006MG] = { .pmin = 0, .pmax = 600 }, [ABP2010MG] = { .pmin = 0, .pmax = 1000 }, [ABP2016MG] = { .pmin = 0, .pmax = 1600 }, [ABP2025MG] = { .pmin = 0, .pmax = 2500 }, [ABP2040MG] = { .pmin = 0, .pmax = 4000 }, [ABP2060MG] = { .pmin = 0, .pmax = 6000 }, [ABP2100MG] = { .pmin = 0, .pmax = 10000 }, [ABP2160MG] = { .pmin = 0, .pmax = 16000 }, [ABP2250MG] = { .pmin = 0, .pmax = 25000 }, [ABP2400MG] = { .pmin = 0, .pmax = 40000 }, [ABP2600MG] = { .pmin = 0, .pmax = 60000 }, [ABP2001ND] = { .pmin = -249, .pmax = 249 }, [ABP2002ND] = { .pmin = -498, .pmax = 498 }, [ABP2004ND] = { .pmin = -996, .pmax = 996 }, [ABP2005ND] = { .pmin = -1245, .pmax = 1245 }, [ABP2010ND] = { .pmin = -2491, .pmax = 2491 }, [ABP2020ND] = { .pmin = -4982, .pmax = 4982 }, [ABP2030ND] = { .pmin = -7473, .pmax = 7473 }, [ABP2002NG] = { .pmin = 0, .pmax = 498 }, [ABP2004NG] = { .pmin = 0, .pmax = 996 }, [ABP2005NG] = { .pmin = 0, .pmax = 1245 }, [ABP2010NG] = { .pmin = 0, .pmax = 2491 }, [ABP2020NG] = { .pmin = 0, .pmax = 4982 }, [ABP2030NG] = { .pmin = 0, .pmax = 7473 }, [ABP2015PA] = { .pmin = 0, .pmax = 103421 }, [ABP2030PA] = { .pmin = 0, .pmax = 206843 }, [ABP2060PA] = { .pmin = 0, .pmax = 413685 }, [ABP2100PA] = { .pmin = 0, .pmax = 689476 }, [ABP2150PA] = { .pmin = 0, .pmax = 1034214 }, [ABP2175PA] = { .pmin = 0, .pmax = 1206583 }, [ABP2001PD] = { .pmin = -6895, .pmax = 6895 }, [ABP2005PD] = { .pmin = -34474, .pmax = 34474 }, [ABP2015PD] = { .pmin = -103421, .pmax = 103421 }, [ABP2030PD] = { .pmin = -206843, .pmax = 206843 }, [ABP2060PD] = { .pmin = -413685, .pmax = 413685 }, [ABP2001PG] = { .pmin = 0, .pmax = 6895 }, [ABP2005PG] = { .pmin = 0, .pmax = 34474 }, [ABP2015PG] = { .pmin = 0, .pmax = 103421 }, [ABP2030PG] = { .pmin = 0, .pmax = 206843 }, [ABP2060PG] = { .pmin = 0, .pmax = 413685 }, [ABP2100PG] = { .pmin = 0, .pmax = 689476 }, [ABP2150PG] = { .pmin = 0, .pmax = 1034214 }, [ABP2175PG] = { .pmin = 0, .pmax = 1206583 }, }; static_assert(ARRAY_SIZE(abp2_triplet_variants) == ARRAY_SIZE(abp2_range_config)); static int abp2_get_measurement(struct abp2_data *data) { struct device *dev = data->dev; int ret; reinit_completion(&data->completion); ret = data->ops->write(data, ABP2_CMD_SYNC, ABP2_PKT_SYNC_LEN); if (ret < 0) return ret; if (data->irq > 0) { ret = wait_for_completion_timeout(&data->completion, HZ); if (!ret) { dev_err(dev, "timeout waiting for EOC interrupt\n"); return -ETIMEDOUT; } } else { fsleep(5 * USEC_PER_MSEC); } memset(data->rx_buf, 0, sizeof(data->rx_buf)); ret = data->ops->read(data, ABP2_CMD_NOP, ABP2_PKT_NOP_LEN); if (ret < 0) return ret; /* * Status byte flags * bit7 SANITY_CHK - must always be 0 * bit6 ABP2_ST_POWER - 1 if device is powered * bit5 ABP2_ST_BUSY - 1 if device has no new conversion ready * bit4 SANITY_CHK - must always be 0 * bit3 SANITY_CHK - must always be 0 * bit2 MEMORY_ERR - 1 if integrity test has failed * bit1 SANITY_CHK - must always be 0 * bit0 MATH_ERR - 1 during internal math saturation error */ if (data->rx_buf[0] == (ABP2_ST_POWER | ABP2_ST_BUSY)) return -EBUSY; /* * The ABP2 sensor series seem to have a noticeable latch-up sensitivity. * A partial latch-up condition manifests as either * - output of invalid status bytes * - zeroed out conversions (despite a normal status byte) * - the MOSI line being pulled low randomly in sync with the SCLK * signal (visible during the ABP2_CMD_NOP command). * https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1588325/am3358-spi-tx-data-corruption */ if (data->rx_buf[0] != ABP2_ST_POWER) { dev_err(data->dev, "unexpected status byte 0x%02x\n", data->rx_buf[0]); return -EIO; } return 0; } static irqreturn_t abp2_eoc_handler(int irq, void *private) { struct abp2_data *data = private; complete(&data->completion); return IRQ_HANDLED; } static irqreturn_t abp2_trigger_handler(int irq, void *private) { int ret; struct iio_poll_func *pf = private; struct iio_dev *indio_dev = pf->indio_dev; struct abp2_data *data = iio_priv(indio_dev); ret = abp2_get_measurement(data); if (ret < 0) goto out_notify_done; data->scan.chan[0] = get_unaligned_be24(&data->rx_buf[1]); data->scan.chan[1] = get_unaligned_be24(&data->rx_buf[4]); iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan), iio_get_time_ns(indio_dev)); out_notify_done: iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } /* * IIO ABI expects * value = (conv + offset) * scale * * temp[C] = conv * a + b * where a = 200/16777215; b = -50 * * temp[C] = (conv + (b/a)) * a * (1000) * => * scale = a * 1000 = .0000119209296 * 1000 = .01192092966562 * offset = b/a = -50 * 16777215 / 200 = -4194303.75 * * 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 abp2_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *channel, int *val, int *val2, long mask) { struct abp2_data *data = iio_priv(indio_dev); int ret; switch (mask) { case IIO_CHAN_INFO_RAW: ret = abp2_get_measurement(data); if (ret < 0) return ret; switch (channel->type) { case IIO_PRESSURE: *val = get_unaligned_be24(&data->rx_buf[1]); return IIO_VAL_INT; case IIO_TEMP: *val = get_unaligned_be24(&data->rx_buf[4]); return IIO_VAL_INT; default: return -EINVAL; } return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: switch (channel->type) { case IIO_TEMP: *val = 0; *val2 = 11920929; return IIO_VAL_INT_PLUS_NANO; 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 = -4194304; return IIO_VAL_INT; case IIO_PRESSURE: *val = data->p_offset; return IIO_VAL_INT; default: return -EINVAL; } default: return -EINVAL; } } static const struct iio_info abp2_info = { .read_raw = &abp2_read_raw, }; static const unsigned long abp2_scan_masks[] = {0x3, 0}; static const struct iio_chan_spec abp2_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 = 24, .storagebits = 32, .endianness = IIO_CPU, }, }, { .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 = 24, .storagebits = 32, .endianness = IIO_CPU, }, }, IIO_CHAN_SOFT_TIMESTAMP(2), }; int abp2_common_probe(struct device *dev, const struct abp2_ops *ops, int irq) { int ret; struct abp2_data *data; struct iio_dev *indio_dev; const char *triplet; s32 tmp; s64 odelta, pdelta; indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); data->dev = dev; data->ops = ops; data->irq = irq; init_completion(&data->completion); indio_dev->name = "abp2030pa"; indio_dev->info = &abp2_info; indio_dev->channels = abp2_channels; indio_dev->num_channels = ARRAY_SIZE(abp2_channels); indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->available_scan_masks = abp2_scan_masks; ret = devm_regulator_get_enable(dev, "vdd"); if (ret) return dev_err_probe(dev, ret, "can't get and enable vdd supply\n"); ret = device_property_read_string(dev, "honeywell,pressure-triplet", &triplet); if (ret) { ret = device_property_read_u32(dev, "honeywell,pmin-pascal", &data->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", &data->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", abp2_triplet_variants, ARRAY_SIZE(abp2_triplet_variants)); if (ret < 0) return dev_err_probe(dev, -EINVAL, "honeywell,pressure-triplet is invalid\n"); data->pmin = abp2_range_config[ret].pmin; data->pmax = abp2_range_config[ret].pmax; } if (data->pmin >= data->pmax) return dev_err_probe(dev, -EINVAL, "pressure limits are invalid\n"); data->outmin = abp2_func_spec[data->function].output_min; data->outmax = abp2_func_spec[data->function].output_max; odelta = data->outmax - data->outmin; pdelta = data->pmax - data->pmin; data->p_scale = div_s64_rem(div_s64(pdelta * NANO, odelta), NANO, &tmp); data->p_scale_dec = tmp; data->p_offset = div_s64(odelta * data->pmin, pdelta) - data->outmin; if (data->irq > 0) { ret = devm_request_irq(dev, irq, abp2_eoc_handler, 0, dev_name(dev), data); if (ret) return ret; } ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, abp2_trigger_handler, NULL); if (ret) return dev_err_probe(dev, ret, "iio triggered buffer setup failed\n"); ret = devm_iio_device_register(dev, indio_dev); if (ret) return dev_err_probe(dev, ret, "unable to register iio device\n"); return 0; } EXPORT_SYMBOL_NS_GPL(abp2_common_probe, "IIO_HONEYWELL_ABP2030PA"); MODULE_AUTHOR("Petre Rodan "); MODULE_DESCRIPTION("Honeywell ABP2 pressure sensor core driver"); MODULE_LICENSE("GPL");