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/acpi.h>
15 #include <linux/i2c.h>
16 #include <linux/iio/iio.h>
17 
18 #include <linux/iio/common/st_sensors.h>
19 #include <linux/iio/common/st_sensors_i2c.h>
20 #include "st_pressure.h"
21 
22 #ifdef CONFIG_OF
23 static const struct of_device_id st_press_of_match[] = {
24 	{
25 		.compatible = "st,lps001wp-press",
26 		.data = LPS001WP_PRESS_DEV_NAME,
27 	},
28 	{
29 		.compatible = "st,lps25h-press",
30 		.data = LPS25H_PRESS_DEV_NAME,
31 	},
32 	{
33 		.compatible = "st,lps331ap-press",
34 		.data = LPS331AP_PRESS_DEV_NAME,
35 	},
36 	{
37 		.compatible = "st,lps22hb-press",
38 		.data = LPS22HB_PRESS_DEV_NAME,
39 	},
40 	{},
41 };
42 MODULE_DEVICE_TABLE(of, st_press_of_match);
43 #else
44 #define st_press_of_match NULL
45 #endif
46 
47 #ifdef CONFIG_ACPI
48 static const struct acpi_device_id st_press_acpi_match[] = {
49 	{"SNO9210", LPS22HB},
50 	{ },
51 };
52 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
53 #else
54 #define st_press_acpi_match NULL
55 #endif
56 
57 static const struct i2c_device_id st_press_id_table[] = {
58 	{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
59 	{ LPS25H_PRESS_DEV_NAME,  LPS25H },
60 	{ LPS331AP_PRESS_DEV_NAME, LPS331AP },
61 	{ LPS22HB_PRESS_DEV_NAME, LPS22HB },
62 	{},
63 };
64 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
65 
66 static int st_press_i2c_probe(struct i2c_client *client,
67 						const struct i2c_device_id *id)
68 {
69 	struct iio_dev *indio_dev;
70 	struct st_sensor_data *press_data;
71 	int ret;
72 
73 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
74 	if (!indio_dev)
75 		return -ENOMEM;
76 
77 	press_data = iio_priv(indio_dev);
78 
79 	if (client->dev.of_node) {
80 		st_sensors_of_i2c_probe(client, st_press_of_match);
81 	} else if (ACPI_HANDLE(&client->dev)) {
82 		ret = st_sensors_match_acpi_device(&client->dev);
83 		if ((ret < 0) || (ret >= ST_PRESS_MAX))
84 			return -ENODEV;
85 
86 		strncpy(client->name, st_press_id_table[ret].name,
87 				sizeof(client->name));
88 		client->name[sizeof(client->name) - 1] = '\0';
89 	} else if (!id)
90 		return -ENODEV;
91 
92 	st_sensors_i2c_configure(indio_dev, client, press_data);
93 
94 	ret = st_press_common_probe(indio_dev);
95 	if (ret < 0)
96 		return ret;
97 
98 	return 0;
99 }
100 
101 static int st_press_i2c_remove(struct i2c_client *client)
102 {
103 	st_press_common_remove(i2c_get_clientdata(client));
104 
105 	return 0;
106 }
107 
108 static struct i2c_driver st_press_driver = {
109 	.driver = {
110 		.name = "st-press-i2c",
111 		.of_match_table = of_match_ptr(st_press_of_match),
112 		.acpi_match_table = ACPI_PTR(st_press_acpi_match),
113 	},
114 	.probe = st_press_i2c_probe,
115 	.remove = st_press_i2c_remove,
116 	.id_table = st_press_id_table,
117 };
118 module_i2c_driver(st_press_driver);
119 
120 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
121 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
122 MODULE_LICENSE("GPL v2");
123