1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2c103de24SGrant Likely /*
3c103de24SGrant Likely * Copyright (C) 2009 Wolfram Sang, Pengutronix
4c103de24SGrant Likely *
5c103de24SGrant Likely * Check max730x.c for further details.
6c103de24SGrant Likely */
7c103de24SGrant Likely
8c103de24SGrant Likely #include <linux/module.h>
9c103de24SGrant Likely #include <linux/init.h>
10c103de24SGrant Likely #include <linux/platform_device.h>
11c103de24SGrant Likely #include <linux/mutex.h>
12c103de24SGrant Likely #include <linux/i2c.h>
13c103de24SGrant Likely #include <linux/spi/max7301.h>
14c103de24SGrant Likely #include <linux/slab.h>
15c103de24SGrant Likely
max7300_i2c_write(struct device * dev,unsigned int reg,unsigned int val)16c103de24SGrant Likely static int max7300_i2c_write(struct device *dev, unsigned int reg,
17c103de24SGrant Likely unsigned int val)
18c103de24SGrant Likely {
19c103de24SGrant Likely struct i2c_client *client = to_i2c_client(dev);
20c103de24SGrant Likely
21c103de24SGrant Likely return i2c_smbus_write_byte_data(client, reg, val);
22c103de24SGrant Likely }
23c103de24SGrant Likely
max7300_i2c_read(struct device * dev,unsigned int reg)24c103de24SGrant Likely static int max7300_i2c_read(struct device *dev, unsigned int reg)
25c103de24SGrant Likely {
26c103de24SGrant Likely struct i2c_client *client = to_i2c_client(dev);
27c103de24SGrant Likely
28c103de24SGrant Likely return i2c_smbus_read_byte_data(client, reg);
29c103de24SGrant Likely }
30c103de24SGrant Likely
max7300_probe(struct i2c_client * client)31bf08ce13SStephen Kitt static int max7300_probe(struct i2c_client *client)
32c103de24SGrant Likely {
33c103de24SGrant Likely struct max7301 *ts;
34c103de24SGrant Likely
35c103de24SGrant Likely if (!i2c_check_functionality(client->adapter,
36c103de24SGrant Likely I2C_FUNC_SMBUS_BYTE_DATA))
37c103de24SGrant Likely return -EIO;
38c103de24SGrant Likely
39c3fe2bf4SJingoo Han ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL);
40c103de24SGrant Likely if (!ts)
41c103de24SGrant Likely return -ENOMEM;
42c103de24SGrant Likely
43c103de24SGrant Likely ts->read = max7300_i2c_read;
44c103de24SGrant Likely ts->write = max7300_i2c_write;
45c103de24SGrant Likely ts->dev = &client->dev;
46c103de24SGrant Likely
4776a2dae0SVarka Bhadram return __max730x_probe(ts);
48c103de24SGrant Likely }
49c103de24SGrant Likely
max7300_remove(struct i2c_client * client)50ed5c2f5fSUwe Kleine-König static void max7300_remove(struct i2c_client *client)
51c103de24SGrant Likely {
5206de2cd7SUwe Kleine-König __max730x_remove(&client->dev);
53c103de24SGrant Likely }
54c103de24SGrant Likely
55c103de24SGrant Likely static const struct i2c_device_id max7300_id[] = {
56c103de24SGrant Likely { "max7300", 0 },
57c103de24SGrant Likely { }
58c103de24SGrant Likely };
59c103de24SGrant Likely MODULE_DEVICE_TABLE(i2c, max7300_id);
60c103de24SGrant Likely
61c103de24SGrant Likely static struct i2c_driver max7300_driver = {
62c103de24SGrant Likely .driver = {
63c103de24SGrant Likely .name = "max7300",
64c103de24SGrant Likely },
65*b41cabb7SUwe Kleine-König .probe = max7300_probe,
668283c4ffSBill Pemberton .remove = max7300_remove,
67c103de24SGrant Likely .id_table = max7300_id,
68c103de24SGrant Likely };
69c103de24SGrant Likely
max7300_init(void)70c103de24SGrant Likely static int __init max7300_init(void)
71c103de24SGrant Likely {
72c103de24SGrant Likely return i2c_add_driver(&max7300_driver);
73c103de24SGrant Likely }
74c103de24SGrant Likely subsys_initcall(max7300_init);
75c103de24SGrant Likely
max7300_exit(void)76c103de24SGrant Likely static void __exit max7300_exit(void)
77c103de24SGrant Likely {
78c103de24SGrant Likely i2c_del_driver(&max7300_driver);
79c103de24SGrant Likely }
80c103de24SGrant Likely module_exit(max7300_exit);
81c103de24SGrant Likely
82c103de24SGrant Likely MODULE_AUTHOR("Wolfram Sang");
83c103de24SGrant Likely MODULE_LICENSE("GPL v2");
84c103de24SGrant Likely MODULE_DESCRIPTION("MAX7300 GPIO-Expander");
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