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 		.compatible = "st,lps33hw",
42 		.data = LPS33HW_PRESS_DEV_NAME,
43 	},
44 	{
45 		.compatible = "st,lps35hw",
46 		.data = LPS35HW_PRESS_DEV_NAME,
47 	},
48 	{},
49 };
50 MODULE_DEVICE_TABLE(of, st_press_of_match);
51 #else
52 #define st_press_of_match NULL
53 #endif
54 
55 #ifdef CONFIG_ACPI
56 static const struct acpi_device_id st_press_acpi_match[] = {
57 	{"SNO9210", LPS22HB},
58 	{ },
59 };
60 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
61 #else
62 #define st_press_acpi_match NULL
63 #endif
64 
65 static const struct i2c_device_id st_press_id_table[] = {
66 	{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
67 	{ LPS25H_PRESS_DEV_NAME,  LPS25H },
68 	{ LPS331AP_PRESS_DEV_NAME, LPS331AP },
69 	{ LPS22HB_PRESS_DEV_NAME, LPS22HB },
70 	{ LPS33HW_PRESS_DEV_NAME, LPS33HW },
71 	{ LPS35HW_PRESS_DEV_NAME, LPS35HW },
72 	{},
73 };
74 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
75 
76 static int st_press_i2c_probe(struct i2c_client *client,
77 						const struct i2c_device_id *id)
78 {
79 	struct iio_dev *indio_dev;
80 	struct st_sensor_data *press_data;
81 	int ret;
82 
83 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
84 	if (!indio_dev)
85 		return -ENOMEM;
86 
87 	press_data = iio_priv(indio_dev);
88 
89 	if (client->dev.of_node) {
90 		st_sensors_of_name_probe(&client->dev, st_press_of_match,
91 					 client->name, sizeof(client->name));
92 	} else if (ACPI_HANDLE(&client->dev)) {
93 		ret = st_sensors_match_acpi_device(&client->dev);
94 		if ((ret < 0) || (ret >= ST_PRESS_MAX))
95 			return -ENODEV;
96 
97 		strncpy(client->name, st_press_id_table[ret].name,
98 				sizeof(client->name));
99 		client->name[sizeof(client->name) - 1] = '\0';
100 	} else if (!id)
101 		return -ENODEV;
102 
103 	st_sensors_i2c_configure(indio_dev, client, press_data);
104 
105 	ret = st_press_common_probe(indio_dev);
106 	if (ret < 0)
107 		return ret;
108 
109 	return 0;
110 }
111 
112 static int st_press_i2c_remove(struct i2c_client *client)
113 {
114 	st_press_common_remove(i2c_get_clientdata(client));
115 
116 	return 0;
117 }
118 
119 static struct i2c_driver st_press_driver = {
120 	.driver = {
121 		.name = "st-press-i2c",
122 		.of_match_table = of_match_ptr(st_press_of_match),
123 		.acpi_match_table = ACPI_PTR(st_press_acpi_match),
124 	},
125 	.probe = st_press_i2c_probe,
126 	.remove = st_press_i2c_remove,
127 	.id_table = st_press_id_table,
128 };
129 module_i2c_driver(st_press_driver);
130 
131 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
132 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
133 MODULE_LICENSE("GPL v2");
134