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
hsc_i2c_recv(struct hsc_data * data)23 static 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(client->adapter, &msg, 1);
37
38 return (ret == 2) ? 0 : ret;
39 }
40
hsc_i2c_probe(struct i2c_client * client)41 static int hsc_i2c_probe(struct i2c_client *client)
42 {
43 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
44 return -EOPNOTSUPP;
45
46 return hsc_common_probe(&client->dev, hsc_i2c_recv);
47 }
48
49 static const struct of_device_id hsc_i2c_match[] = {
50 { .compatible = "honeywell,hsc030pa" },
51 {}
52 };
53 MODULE_DEVICE_TABLE(of, hsc_i2c_match);
54
55 static const struct i2c_device_id hsc_i2c_id[] = {
56 { "hsc030pa" },
57 {}
58 };
59 MODULE_DEVICE_TABLE(i2c, hsc_i2c_id);
60
61 static 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 };
69 module_i2c_driver(hsc_i2c_driver);
70
71 MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
72 MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor i2c driver");
73 MODULE_LICENSE("GPL");
74 MODULE_IMPORT_NS(IIO_HONEYWELL_HSC030PA);
75