1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * STMicroelectronics pressures driver
4  *
5  * Copyright 2013 STMicroelectronics Inc.
6  *
7  * Denis Ciocca <denis.ciocca@st.com>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/acpi.h>
14 #include <linux/i2c.h>
15 #include <linux/iio/iio.h>
16 
17 #include <linux/iio/common/st_sensors.h>
18 #include <linux/iio/common/st_sensors_i2c.h>
19 #include "st_pressure.h"
20 
21 #ifdef CONFIG_OF
22 static const struct of_device_id st_press_of_match[] = {
23 	{
24 		.compatible = "st,lps001wp-press",
25 		.data = LPS001WP_PRESS_DEV_NAME,
26 	},
27 	{
28 		.compatible = "st,lps25h-press",
29 		.data = LPS25H_PRESS_DEV_NAME,
30 	},
31 	{
32 		.compatible = "st,lps331ap-press",
33 		.data = LPS331AP_PRESS_DEV_NAME,
34 	},
35 	{
36 		.compatible = "st,lps22hb-press",
37 		.data = LPS22HB_PRESS_DEV_NAME,
38 	},
39 	{
40 		.compatible = "st,lps33hw",
41 		.data = LPS33HW_PRESS_DEV_NAME,
42 	},
43 	{
44 		.compatible = "st,lps35hw",
45 		.data = LPS35HW_PRESS_DEV_NAME,
46 	},
47 	{
48 		.compatible = "st,lps22hh",
49 		.data = LPS22HH_PRESS_DEV_NAME,
50 	},
51 	{},
52 };
53 MODULE_DEVICE_TABLE(of, st_press_of_match);
54 #else
55 #define st_press_of_match NULL
56 #endif
57 
58 #ifdef CONFIG_ACPI
59 static const struct acpi_device_id st_press_acpi_match[] = {
60 	{"SNO9210", LPS22HB},
61 	{ },
62 };
63 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
64 #else
65 #define st_press_acpi_match NULL
66 #endif
67 
68 static const struct i2c_device_id st_press_id_table[] = {
69 	{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
70 	{ LPS25H_PRESS_DEV_NAME,  LPS25H },
71 	{ LPS331AP_PRESS_DEV_NAME, LPS331AP },
72 	{ LPS22HB_PRESS_DEV_NAME, LPS22HB },
73 	{ LPS33HW_PRESS_DEV_NAME, LPS33HW },
74 	{ LPS35HW_PRESS_DEV_NAME, LPS35HW },
75 	{ LPS22HH_PRESS_DEV_NAME, LPS22HH },
76 	{},
77 };
78 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
79 
80 static int st_press_i2c_probe(struct i2c_client *client,
81 			      const struct i2c_device_id *id)
82 {
83 	const struct st_sensor_settings *settings;
84 	struct st_sensor_data *press_data;
85 	struct iio_dev *indio_dev;
86 	int ret;
87 
88 	if (client->dev.of_node) {
89 		st_sensors_of_name_probe(&client->dev, st_press_of_match,
90 					 client->name, sizeof(client->name));
91 	} else if (ACPI_HANDLE(&client->dev)) {
92 		ret = st_sensors_match_acpi_device(&client->dev);
93 		if ((ret < 0) || (ret >= ST_PRESS_MAX))
94 			return -ENODEV;
95 
96 		strlcpy(client->name, st_press_id_table[ret].name,
97 			sizeof(client->name));
98 	} else if (!id)
99 		return -ENODEV;
100 
101 	settings = st_press_get_settings(client->name);
102 	if (!settings) {
103 		dev_err(&client->dev, "device name %s not recognized.\n",
104 			client->name);
105 		return -ENODEV;
106 	}
107 
108 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
109 	if (!indio_dev)
110 		return -ENOMEM;
111 
112 	press_data = iio_priv(indio_dev);
113 	press_data->sensor_settings = (struct st_sensor_settings *)settings;
114 
115 	ret = st_sensors_i2c_configure(indio_dev, client);
116 	if (ret < 0)
117 		return ret;
118 
119 	ret = st_press_common_probe(indio_dev);
120 	if (ret < 0)
121 		return ret;
122 
123 	return 0;
124 }
125 
126 static int st_press_i2c_remove(struct i2c_client *client)
127 {
128 	st_press_common_remove(i2c_get_clientdata(client));
129 
130 	return 0;
131 }
132 
133 static struct i2c_driver st_press_driver = {
134 	.driver = {
135 		.name = "st-press-i2c",
136 		.of_match_table = of_match_ptr(st_press_of_match),
137 		.acpi_match_table = ACPI_PTR(st_press_acpi_match),
138 	},
139 	.probe = st_press_i2c_probe,
140 	.remove = st_press_i2c_remove,
141 	.id_table = st_press_id_table,
142 };
143 module_i2c_driver(st_press_driver);
144 
145 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
146 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
147 MODULE_LICENSE("GPL v2");
148