6362d96585
Adds driver for digital Honeywell TruStability HSC and SSC series pressure and temperature sensors. Communication is one way. The sensor only requires 4 bytes worth of clock pulses on both i2c and spi in order to push the data out. The i2c address is hardcoded and depends on the part number. There is no additional GPIO control. code is now based on iio/togreg 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 [HSC] Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/trustability-ssc-series/documents/sps-siot-trustability-ssc-series-standard-accuracy-board-mount-pressure-sensors-50099533-a-en-ciid-151134.pdf [SSC] Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20231207164634.11998-2-petre.rodan@subdimension.ro Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Honeywell TruStability HSC Series pressure/temperature sensor
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*
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* Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro>
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*/
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#ifndef _HSC030PA_H
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#define _HSC030PA_H
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#include <linux/types.h>
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#define HSC_REG_MEASUREMENT_RD_SIZE 4
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struct device;
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struct iio_chan_spec;
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struct iio_dev;
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struct hsc_data;
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struct hsc_chip_data;
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typedef int (*hsc_recv_fn)(struct hsc_data *);
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/**
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* struct hsc_data
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* @dev: current device structure
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* @chip: structure containing chip's channel properties
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* @recv_cb: function that implements the chip reads
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* @is_valid: true if last transfer has been validated
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* @pmin: minimum measurable pressure limit
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* @pmax: maximum measurable pressure limit
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* @outmin: minimum raw pressure in counts (based on transfer function)
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* @outmax: maximum raw pressure in counts (based on transfer function)
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* @function: transfer function
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* @p_scale: pressure scale
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* @p_scale_dec: pressure scale, decimal places
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* @p_offset: pressure offset
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* @p_offset_dec: pressure offset, decimal places
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* @buffer: raw conversion data
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*/
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struct hsc_data {
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struct device *dev;
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const struct hsc_chip_data *chip;
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hsc_recv_fn recv_cb;
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bool is_valid;
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s32 pmin;
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s32 pmax;
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u32 outmin;
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u32 outmax;
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u32 function;
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s64 p_scale;
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s32 p_scale_dec;
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s64 p_offset;
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s32 p_offset_dec;
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u8 buffer[HSC_REG_MEASUREMENT_RD_SIZE] __aligned(IIO_DMA_MINALIGN);
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};
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struct hsc_chip_data {
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bool (*valid)(struct hsc_data *data);
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const struct iio_chan_spec *channels;
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u8 num_channels;
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};
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enum hsc_func_id {
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HSC_FUNCTION_A,
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HSC_FUNCTION_B,
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HSC_FUNCTION_C,
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HSC_FUNCTION_F,
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};
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int hsc_common_probe(struct device *dev, hsc_recv_fn recv);
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#endif
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