1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * STMicroelectronics pressures driver
4  *
5  * Copyright 2013 STMicroelectronics Inc.
6  *
7  * Denis Ciocca <denis.ciocca@st.com>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/mod_devicetable.h>
13 #include <linux/spi/spi.h>
14 #include <linux/iio/iio.h>
15 
16 #include <linux/iio/common/st_sensors.h>
17 #include <linux/iio/common/st_sensors_spi.h>
18 #include "st_pressure.h"
19 
20 /*
21  * For new single-chip sensors use <device_name> as compatible string.
22  * For old single-chip devices keep <device_name>-press to maintain
23  * compatibility
24  */
25 static const struct of_device_id st_press_of_match[] = {
26 	{
27 		.compatible = "st,lps001wp-press",
28 		.data = LPS001WP_PRESS_DEV_NAME,
29 	},
30 	{
31 		.compatible = "st,lps25h-press",
32 		.data = LPS25H_PRESS_DEV_NAME,
33 	},
34 	{
35 		.compatible = "st,lps331ap-press",
36 		.data = LPS331AP_PRESS_DEV_NAME,
37 	},
38 	{
39 		.compatible = "st,lps22hb-press",
40 		.data = LPS22HB_PRESS_DEV_NAME,
41 	},
42 	{
43 		.compatible = "st,lps33hw",
44 		.data = LPS33HW_PRESS_DEV_NAME,
45 	},
46 	{
47 		.compatible = "st,lps35hw",
48 		.data = LPS35HW_PRESS_DEV_NAME,
49 	},
50 	{
51 		.compatible = "st,lps22hh",
52 		.data = LPS22HH_PRESS_DEV_NAME,
53 	},
54 	{
55 		.compatible = "st,lps22df",
56 		.data = LPS22DF_PRESS_DEV_NAME,
57 	},
58 	{},
59 };
60 MODULE_DEVICE_TABLE(of, st_press_of_match);
61 
st_press_spi_probe(struct spi_device * spi)62 static int st_press_spi_probe(struct spi_device *spi)
63 {
64 	const struct st_sensor_settings *settings;
65 	struct st_sensor_data *press_data;
66 	struct iio_dev *indio_dev;
67 	int err;
68 
69 	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
70 
71 	settings = st_press_get_settings(spi->modalias);
72 	if (!settings) {
73 		dev_err(&spi->dev, "device name %s not recognized.\n",
74 			spi->modalias);
75 		return -ENODEV;
76 	}
77 
78 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
79 	if (!indio_dev)
80 		return -ENOMEM;
81 
82 	press_data = iio_priv(indio_dev);
83 	press_data->sensor_settings = (struct st_sensor_settings *)settings;
84 
85 	err = st_sensors_spi_configure(indio_dev, spi);
86 	if (err < 0)
87 		return err;
88 
89 	err = st_sensors_power_enable(indio_dev);
90 	if (err)
91 		return err;
92 
93 	return st_press_common_probe(indio_dev);
94 }
95 
96 static const struct spi_device_id st_press_id_table[] = {
97 	{ LPS001WP_PRESS_DEV_NAME },
98 	{ LPS25H_PRESS_DEV_NAME },
99 	{ LPS331AP_PRESS_DEV_NAME },
100 	{ LPS22HB_PRESS_DEV_NAME },
101 	{ LPS33HW_PRESS_DEV_NAME },
102 	{ LPS35HW_PRESS_DEV_NAME },
103 	{ LPS22HH_PRESS_DEV_NAME },
104 	{ LPS22DF_PRESS_DEV_NAME },
105 	{ "lps001wp-press" },
106 	{ "lps25h-press", },
107 	{ "lps331ap-press" },
108 	{ "lps22hb-press" },
109 	{},
110 };
111 MODULE_DEVICE_TABLE(spi, st_press_id_table);
112 
113 static struct spi_driver st_press_driver = {
114 	.driver = {
115 		.name = "st-press-spi",
116 		.of_match_table = st_press_of_match,
117 	},
118 	.probe = st_press_spi_probe,
119 	.id_table = st_press_id_table,
120 };
121 module_spi_driver(st_press_driver);
122 
123 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
124 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
125 MODULE_LICENSE("GPL v2");
126 MODULE_IMPORT_NS(IIO_ST_SENSORS);
127