1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Honeywell TruStability HSC Series pressure/temperature sensor
4 *
5 * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro>
6 *
7 * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/common/documents/sps-siot-i2c-comms-digital-output-pressure-sensors-tn-008201-3-en-ciid-45841.pdf
8 * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/common/documents/sps-siot-sleep-mode-technical-note-008286-1-en-ciid-155793.pdf
9 */
10
11#include <linux/delay.h>
12#include <linux/device.h>
13#include <linux/errno.h>
14#include <linux/i2c.h>
15#include <linux/mod_devicetable.h>
16#include <linux/module.h>
17#include <linux/types.h>
18
19#include <linux/iio/iio.h>
20
21#include "hsc030pa.h"
22
23static int hsc_i2c_recv(struct hsc_data *data)
24{
25 struct i2c_client *client = to_i2c_client(data->dev);
26 struct i2c_msg msg;
27 int ret;
28
29 msleep_interruptible(HSC_RESP_TIME_MS);
30
31 msg.addr = client->addr;
32 msg.flags = client->flags | I2C_M_RD;
33 msg.len = HSC_REG_MEASUREMENT_RD_SIZE;
34 msg.buf = data->buffer;
35
36 ret = i2c_transfer(adap: client->adapter, msgs: &msg, num: 1);
37
38 return (ret == 2) ? 0 : ret;
39}
40
41static int hsc_i2c_probe(struct i2c_client *client)
42{
43 if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C))
44 return -EOPNOTSUPP;
45
46 return hsc_common_probe(dev: &client->dev, recv: hsc_i2c_recv);
47}
48
49static const struct of_device_id hsc_i2c_match[] = {
50 { .compatible = "honeywell,hsc030pa" },
51 {}
52};
53MODULE_DEVICE_TABLE(of, hsc_i2c_match);
54
55static const struct i2c_device_id hsc_i2c_id[] = {
56 { "hsc030pa" },
57 {}
58};
59MODULE_DEVICE_TABLE(i2c, hsc_i2c_id);
60
61static struct i2c_driver hsc_i2c_driver = {
62 .driver = {
63 .name = "hsc030pa",
64 .of_match_table = hsc_i2c_match,
65 },
66 .probe = hsc_i2c_probe,
67 .id_table = hsc_i2c_id,
68};
69module_i2c_driver(hsc_i2c_driver);
70
71MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
72MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor i2c driver");
73MODULE_LICENSE("GPL");
74MODULE_IMPORT_NS(IIO_HONEYWELL_HSC030PA);
75

source code of linux/drivers/iio/pressure/hsc030pa_i2c.c