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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Honeywell TruStability HSC Series pressure/temperature sensor4 *5 * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro>6 */7 8#ifndef _HSC030PA_H9#define _HSC030PA_H10 11#include <linux/types.h>12 13#include <linux/iio/iio.h>14 15#define HSC_REG_MEASUREMENT_RD_SIZE 416#define HSC_RESP_TIME_MS 217 18struct device;19 20struct iio_chan_spec;21struct iio_dev;22 23struct hsc_data;24struct hsc_chip_data;25 26typedef int (*hsc_recv_fn)(struct hsc_data *);27 28/**29 * struct hsc_data30 * @dev: current device structure31 * @chip: structure containing chip's channel properties32 * @recv_cb: function that implements the chip reads33 * @is_valid: true if last transfer has been validated34 * @pmin: minimum measurable pressure limit35 * @pmax: maximum measurable pressure limit36 * @outmin: minimum raw pressure in counts (based on transfer function)37 * @outmax: maximum raw pressure in counts (based on transfer function)38 * @function: transfer function39 * @p_scale: pressure scale40 * @p_scale_dec: pressure scale, decimal places41 * @p_offset: pressure offset42 * @p_offset_dec: pressure offset, decimal places43 * @buffer: raw conversion data44 */45struct hsc_data {46 struct device *dev;47 const struct hsc_chip_data *chip;48 hsc_recv_fn recv_cb;49 bool is_valid;50 s32 pmin;51 s32 pmax;52 u32 outmin;53 u32 outmax;54 u32 function;55 s64 p_scale;56 s32 p_scale_dec;57 s64 p_offset;58 s32 p_offset_dec;59 struct {60 __be16 chan[2];61 s64 timestamp __aligned(8);62 } scan;63 u8 buffer[HSC_REG_MEASUREMENT_RD_SIZE] __aligned(IIO_DMA_MINALIGN);64};65 66struct hsc_chip_data {67 bool (*valid)(struct hsc_data *data);68 const struct iio_chan_spec *channels;69 u8 num_channels;70};71 72enum hsc_func_id {73 HSC_FUNCTION_A,74 HSC_FUNCTION_B,75 HSC_FUNCTION_C,76 HSC_FUNCTION_F,77};78 79int hsc_common_probe(struct device *dev, hsc_recv_fn recv);80 81#endif82