1 /*
2  * STMicroelectronics pressures driver
3  *
4  * Copyright 2013 STMicroelectronics Inc.
5  *
6  * Denis Ciocca <denis.ciocca@st.com>
7  *
8  * Licensed under the GPL-2.
9  */
10 
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/spi/spi.h>
15 #include <linux/iio/iio.h>
16 
17 #include <linux/iio/common/st_sensors.h>
18 #include <linux/iio/common/st_sensors_spi.h>
19 #include "st_pressure.h"
20 
21 #ifdef CONFIG_OF
22 /*
23  * For new single-chip sensors use <device_name> as compatible string.
24  * For old single-chip devices keep <device_name>-press to maintain
25  * compatibility
26  */
27 static const struct of_device_id st_press_of_match[] = {
28 	{
29 		.compatible = "st,lps001wp-press",
30 		.data = LPS001WP_PRESS_DEV_NAME,
31 	},
32 	{
33 		.compatible = "st,lps25h-press",
34 		.data = LPS25H_PRESS_DEV_NAME,
35 	},
36 	{
37 		.compatible = "st,lps331ap-press",
38 		.data = LPS331AP_PRESS_DEV_NAME,
39 	},
40 	{
41 		.compatible = "st,lps22hb-press",
42 		.data = LPS22HB_PRESS_DEV_NAME,
43 	},
44 	{
45 		.compatible = "st,lps33hw",
46 		.data = LPS33HW_PRESS_DEV_NAME,
47 	},
48 	{
49 		.compatible = "st,lps35hw",
50 		.data = LPS35HW_PRESS_DEV_NAME,
51 	},
52 	{
53 		.compatible = "st,lps22hh",
54 		.data = LPS22HH_PRESS_DEV_NAME,
55 	},
56 	{},
57 };
58 MODULE_DEVICE_TABLE(of, st_press_of_match);
59 #else
60 #define st_press_of_match	NULL
61 #endif
62 
63 static int st_press_spi_probe(struct spi_device *spi)
64 {
65 	struct iio_dev *indio_dev;
66 	struct st_sensor_data *press_data;
67 	int err;
68 
69 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
70 	if (indio_dev == NULL)
71 		return -ENOMEM;
72 
73 	press_data = iio_priv(indio_dev);
74 
75 	st_sensors_of_name_probe(&spi->dev, st_press_of_match,
76 				 spi->modalias, sizeof(spi->modalias));
77 	st_sensors_spi_configure(indio_dev, spi, press_data);
78 
79 	err = st_press_common_probe(indio_dev);
80 	if (err < 0)
81 		return err;
82 
83 	return 0;
84 }
85 
86 static int st_press_spi_remove(struct spi_device *spi)
87 {
88 	st_press_common_remove(spi_get_drvdata(spi));
89 
90 	return 0;
91 }
92 
93 static const struct spi_device_id st_press_id_table[] = {
94 	{ LPS001WP_PRESS_DEV_NAME },
95 	{ LPS25H_PRESS_DEV_NAME },
96 	{ LPS331AP_PRESS_DEV_NAME },
97 	{ LPS22HB_PRESS_DEV_NAME },
98 	{ LPS33HW_PRESS_DEV_NAME },
99 	{ LPS35HW_PRESS_DEV_NAME },
100 	{ LPS22HH_PRESS_DEV_NAME },
101 	{},
102 };
103 MODULE_DEVICE_TABLE(spi, st_press_id_table);
104 
105 static struct spi_driver st_press_driver = {
106 	.driver = {
107 		.name = "st-press-spi",
108 		.of_match_table = of_match_ptr(st_press_of_match),
109 	},
110 	.probe = st_press_spi_probe,
111 	.remove = st_press_spi_remove,
112 	.id_table = st_press_id_table,
113 };
114 module_spi_driver(st_press_driver);
115 
116 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
117 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
118 MODULE_LICENSE("GPL v2");
119