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/slab.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 #ifdef CONFIG_OF
21 /*
22  * For new single-chip sensors use <device_name> as compatible string.
23  * For old single-chip devices keep <device_name>-press to maintain
24  * compatibility
25  */
26 static const struct of_device_id st_press_of_match[] = {
27 	{
28 		.compatible = "st,lps001wp-press",
29 		.data = LPS001WP_PRESS_DEV_NAME,
30 	},
31 	{
32 		.compatible = "st,lps25h-press",
33 		.data = LPS25H_PRESS_DEV_NAME,
34 	},
35 	{
36 		.compatible = "st,lps331ap-press",
37 		.data = LPS331AP_PRESS_DEV_NAME,
38 	},
39 	{
40 		.compatible = "st,lps22hb-press",
41 		.data = LPS22HB_PRESS_DEV_NAME,
42 	},
43 	{
44 		.compatible = "st,lps33hw",
45 		.data = LPS33HW_PRESS_DEV_NAME,
46 	},
47 	{
48 		.compatible = "st,lps35hw",
49 		.data = LPS35HW_PRESS_DEV_NAME,
50 	},
51 	{
52 		.compatible = "st,lps22hh",
53 		.data = LPS22HH_PRESS_DEV_NAME,
54 	},
55 	{},
56 };
57 MODULE_DEVICE_TABLE(of, st_press_of_match);
58 #else
59 #define st_press_of_match	NULL
60 #endif
61 
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_of_name_probe(&spi->dev, st_press_of_match,
70 				 spi->modalias, sizeof(spi->modalias));
71 
72 	settings = st_press_get_settings(spi->modalias);
73 	if (!settings) {
74 		dev_err(&spi->dev, "device name %s not recognized.\n",
75 			spi->modalias);
76 		return -ENODEV;
77 	}
78 
79 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
80 	if (!indio_dev)
81 		return -ENOMEM;
82 
83 	press_data = iio_priv(indio_dev);
84 	press_data->sensor_settings = (struct st_sensor_settings *)settings;
85 
86 	err = st_sensors_spi_configure(indio_dev, spi);
87 	if (err < 0)
88 		return err;
89 
90 	err = st_press_common_probe(indio_dev);
91 	if (err < 0)
92 		return err;
93 
94 	return 0;
95 }
96 
97 static int st_press_spi_remove(struct spi_device *spi)
98 {
99 	st_press_common_remove(spi_get_drvdata(spi));
100 
101 	return 0;
102 }
103 
104 static const struct spi_device_id st_press_id_table[] = {
105 	{ LPS001WP_PRESS_DEV_NAME },
106 	{ LPS25H_PRESS_DEV_NAME },
107 	{ LPS331AP_PRESS_DEV_NAME },
108 	{ LPS22HB_PRESS_DEV_NAME },
109 	{ LPS33HW_PRESS_DEV_NAME },
110 	{ LPS35HW_PRESS_DEV_NAME },
111 	{ LPS22HH_PRESS_DEV_NAME },
112 	{},
113 };
114 MODULE_DEVICE_TABLE(spi, st_press_id_table);
115 
116 static struct spi_driver st_press_driver = {
117 	.driver = {
118 		.name = "st-press-spi",
119 		.of_match_table = of_match_ptr(st_press_of_match),
120 	},
121 	.probe = st_press_spi_probe,
122 	.remove = st_press_spi_remove,
123 	.id_table = st_press_id_table,
124 };
125 module_spi_driver(st_press_driver);
126 
127 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
128 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
129 MODULE_LICENSE("GPL v2");
130