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

 
 1/*
 2 * Copyright (C) 2009 Wolfram Sang, Pengutronix
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License version 2 as
 6 * published by the Free Software Foundation.
 7 *
 8 * Check max730x.c for further details.
 9 */
10
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/platform_device.h>
14#include <linux/mutex.h>
15#include <linux/i2c.h>
16#include <linux/spi/max7301.h>
17#include <linux/slab.h>
18
19static int max7300_i2c_write(struct device *dev, unsigned int reg,
20				unsigned int val)
21{
22	struct i2c_client *client = to_i2c_client(dev);
23
24	return i2c_smbus_write_byte_data(client, reg, val);
25}
26
27static int max7300_i2c_read(struct device *dev, unsigned int reg)
28{
29	struct i2c_client *client = to_i2c_client(dev);
30
31	return i2c_smbus_read_byte_data(client, reg);
32}
33
34static int max7300_probe(struct i2c_client *client,
35			 const struct i2c_device_id *id)
36{
37	struct max7301 *ts;
38
39	if (!i2c_check_functionality(client->adapter,
40			I2C_FUNC_SMBUS_BYTE_DATA))
41		return -EIO;
42
43	ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL);
44	if (!ts)
45		return -ENOMEM;
46
47	ts->read = max7300_i2c_read;
48	ts->write = max7300_i2c_write;
49	ts->dev = &client->dev;
50
51	return __max730x_probe(ts);
52}
53
54static int max7300_remove(struct i2c_client *client)
55{
56	return __max730x_remove(&client->dev);
57}
58
59static const struct i2c_device_id max7300_id[] = {
60	{ "max7300", 0 },
61	{ }
62};
63MODULE_DEVICE_TABLE(i2c, max7300_id);
64
65static struct i2c_driver max7300_driver = {
66	.driver = {
67		.name = "max7300",
68	},
69	.probe = max7300_probe,
70	.remove = max7300_remove,
71	.id_table = max7300_id,
72};
73
74static int __init max7300_init(void)
75{
76	return i2c_add_driver(&max7300_driver);
77}
78subsys_initcall(max7300_init);
79
80static void __exit max7300_exit(void)
81{
82	i2c_del_driver(&max7300_driver);
83}
84module_exit(max7300_exit);
85
86MODULE_AUTHOR("Wolfram Sang");
87MODULE_LICENSE("GPL v2");
88MODULE_DESCRIPTION("MAX7300 GPIO-Expander");