// 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");
