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 		.compatible = "st,lps22hh",
50 		.data = LPS22HH_PRESS_DEV_NAME,
51 	},
52 	{},
53 };
54 MODULE_DEVICE_TABLE(of, st_press_of_match);
55 #else
56 #define st_press_of_match NULL
57 #endif
58 
59 #ifdef CONFIG_ACPI
60 static const struct acpi_device_id st_press_acpi_match[] = {
61 	{"SNO9210", LPS22HB},
62 	{ },
63 };
64 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
65 #else
66 #define st_press_acpi_match NULL
67 #endif
68 
69 static const struct i2c_device_id st_press_id_table[] = {
70 	{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
71 	{ LPS25H_PRESS_DEV_NAME,  LPS25H },
72 	{ LPS331AP_PRESS_DEV_NAME, LPS331AP },
73 	{ LPS22HB_PRESS_DEV_NAME, LPS22HB },
74 	{ LPS33HW_PRESS_DEV_NAME, LPS33HW },
75 	{ LPS35HW_PRESS_DEV_NAME, LPS35HW },
76 	{ LPS22HH_PRESS_DEV_NAME, LPS22HH },
77 	{},
78 };
79 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
80 
81 static int st_press_i2c_probe(struct i2c_client *client,
82 						const struct i2c_device_id *id)
83 {
84 	struct iio_dev *indio_dev;
85 	struct st_sensor_data *press_data;
86 	int ret;
87 
88 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
89 	if (!indio_dev)
90 		return -ENOMEM;
91 
92 	press_data = iio_priv(indio_dev);
93 
94 	if (client->dev.of_node) {
95 		st_sensors_of_name_probe(&client->dev, st_press_of_match,
96 					 client->name, sizeof(client->name));
97 	} else if (ACPI_HANDLE(&client->dev)) {
98 		ret = st_sensors_match_acpi_device(&client->dev);
99 		if ((ret < 0) || (ret >= ST_PRESS_MAX))
100 			return -ENODEV;
101 
102 		strlcpy(client->name, st_press_id_table[ret].name,
103 				sizeof(client->name));
104 	} else if (!id)
105 		return -ENODEV;
106 
107 	st_sensors_i2c_configure(indio_dev, client, press_data);
108 
109 	ret = st_press_common_probe(indio_dev);
110 	if (ret < 0)
111 		return ret;
112 
113 	return 0;
114 }
115 
116 static int st_press_i2c_remove(struct i2c_client *client)
117 {
118 	st_press_common_remove(i2c_get_clientdata(client));
119 
120 	return 0;
121 }
122 
123 static struct i2c_driver st_press_driver = {
124 	.driver = {
125 		.name = "st-press-i2c",
126 		.of_match_table = of_match_ptr(st_press_of_match),
127 		.acpi_match_table = ACPI_PTR(st_press_acpi_match),
128 	},
129 	.probe = st_press_i2c_probe,
130 	.remove = st_press_i2c_remove,
131 	.id_table = st_press_id_table,
132 };
133 module_i2c_driver(st_press_driver);
134 
135 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
136 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
137 MODULE_LICENSE("GPL v2");
138