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 };
46 MODULE_DEVICE_TABLE(of, st_press_of_match);
47 #else
48 #define st_press_of_match	NULL
49 #endif
50 
51 static int st_press_spi_probe(struct spi_device *spi)
52 {
53 	struct iio_dev *indio_dev;
54 	struct st_sensor_data *press_data;
55 	int err;
56 
57 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
58 	if (indio_dev == NULL)
59 		return -ENOMEM;
60 
61 	press_data = iio_priv(indio_dev);
62 
63 	st_sensors_of_name_probe(&spi->dev, st_press_of_match,
64 				 spi->modalias, sizeof(spi->modalias));
65 	st_sensors_spi_configure(indio_dev, spi, press_data);
66 
67 	err = st_press_common_probe(indio_dev);
68 	if (err < 0)
69 		return err;
70 
71 	return 0;
72 }
73 
74 static int st_press_spi_remove(struct spi_device *spi)
75 {
76 	st_press_common_remove(spi_get_drvdata(spi));
77 
78 	return 0;
79 }
80 
81 static const struct spi_device_id st_press_id_table[] = {
82 	{ LPS001WP_PRESS_DEV_NAME },
83 	{ LPS25H_PRESS_DEV_NAME },
84 	{ LPS331AP_PRESS_DEV_NAME },
85 	{ LPS22HB_PRESS_DEV_NAME },
86 	{},
87 };
88 MODULE_DEVICE_TABLE(spi, st_press_id_table);
89 
90 static struct spi_driver st_press_driver = {
91 	.driver = {
92 		.name = "st-press-spi",
93 		.of_match_table = of_match_ptr(st_press_of_match),
94 	},
95 	.probe = st_press_spi_probe,
96 	.remove = st_press_spi_remove,
97 	.id_table = st_press_id_table,
98 };
99 module_spi_driver(st_press_driver);
100 
101 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
102 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
103 MODULE_LICENSE("GPL v2");
104