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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
4 */
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/i2c.h>
8#include <linux/of.h>
9
10#include "lan9303.h"
11
12struct lan9303_i2c {
13 struct i2c_client *device;
14 struct lan9303 chip;
15};
16
17static const struct regmap_config lan9303_i2c_regmap_config = {
18 .reg_bits = 8,
19 .val_bits = 32,
20 .reg_stride = 1,
21 .can_multi_write = true,
22 .max_register = 0x0ff, /* address bits 0..1 are not used */
23 .reg_format_endian = REGMAP_ENDIAN_LITTLE,
24
25 .volatile_table = &lan9303_register_set,
26 .wr_table = &lan9303_register_set,
27 .rd_table = &lan9303_register_set,
28
29 .cache_type = REGCACHE_NONE,
30};
31
32static int lan9303_i2c_probe(struct i2c_client *client)
33{
34 struct lan9303_i2c *sw_dev;
35 int ret;
36
37 sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
38 GFP_KERNEL);
39 if (!sw_dev)
40 return -ENOMEM;
41
42 sw_dev->chip.regmap = devm_regmap_init_i2c(client,
43 &lan9303_i2c_regmap_config);
44 if (IS_ERR(sw_dev->chip.regmap)) {
45 ret = PTR_ERR(sw_dev->chip.regmap);
46 dev_err(&client->dev, "Failed to allocate register map: %d\n",
47 ret);
48 return ret;
49 }
50
51 /* link forward and backward */
52 sw_dev->device = client;
53 i2c_set_clientdata(client, sw_dev);
54 sw_dev->chip.dev = &client->dev;
55
56 sw_dev->chip.ops = &lan9303_indirect_phy_ops;
57
58 ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
59 if (ret != 0)
60 return ret;
61
62 dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
63
64 return 0;
65}
66
67static void lan9303_i2c_remove(struct i2c_client *client)
68{
69 struct lan9303_i2c *sw_dev = i2c_get_clientdata(client);
70
71 if (!sw_dev)
72 return;
73
74 lan9303_remove(&sw_dev->chip);
75}
76
77static void lan9303_i2c_shutdown(struct i2c_client *client)
78{
79 struct lan9303_i2c *sw_dev = i2c_get_clientdata(client);
80
81 if (!sw_dev)
82 return;
83
84 lan9303_shutdown(&sw_dev->chip);
85
86 i2c_set_clientdata(client, NULL);
87}
88
89/*-------------------------------------------------------------------------*/
90
91static const struct i2c_device_id lan9303_i2c_id[] = {
92 { "lan9303" },
93 { /* sentinel */ }
94};
95MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
96
97static const struct of_device_id lan9303_i2c_of_match[] = {
98 { .compatible = "smsc,lan9303-i2c", },
99 { /* sentinel */ },
100};
101MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
102
103static struct i2c_driver lan9303_i2c_driver = {
104 .driver = {
105 .name = "LAN9303_I2C",
106 .of_match_table = lan9303_i2c_of_match,
107 },
108 .probe = lan9303_i2c_probe,
109 .remove = lan9303_i2c_remove,
110 .shutdown = lan9303_i2c_shutdown,
111 .id_table = lan9303_i2c_id,
112};
113module_i2c_driver(lan9303_i2c_driver);
114
115MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
116MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");
117MODULE_LICENSE("GPL v2");
1/*
2 * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 */
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/i2c.h>
17#include <linux/of.h>
18
19#include "lan9303.h"
20
21struct lan9303_i2c {
22 struct i2c_client *device;
23 struct lan9303 chip;
24};
25
26static const struct regmap_config lan9303_i2c_regmap_config = {
27 .reg_bits = 8,
28 .val_bits = 32,
29 .reg_stride = 1,
30 .can_multi_write = true,
31 .max_register = 0x0ff, /* address bits 0..1 are not used */
32 .reg_format_endian = REGMAP_ENDIAN_LITTLE,
33
34 .volatile_table = &lan9303_register_set,
35 .wr_table = &lan9303_register_set,
36 .rd_table = &lan9303_register_set,
37
38 .cache_type = REGCACHE_NONE,
39};
40
41static int lan9303_i2c_probe(struct i2c_client *client,
42 const struct i2c_device_id *id)
43{
44 struct lan9303_i2c *sw_dev;
45 int ret;
46
47 sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
48 GFP_KERNEL);
49 if (!sw_dev)
50 return -ENOMEM;
51
52 sw_dev->chip.regmap = devm_regmap_init_i2c(client,
53 &lan9303_i2c_regmap_config);
54 if (IS_ERR(sw_dev->chip.regmap)) {
55 ret = PTR_ERR(sw_dev->chip.regmap);
56 dev_err(&client->dev, "Failed to allocate register map: %d\n",
57 ret);
58 return ret;
59 }
60
61 /* link forward and backward */
62 sw_dev->device = client;
63 i2c_set_clientdata(client, sw_dev);
64 sw_dev->chip.dev = &client->dev;
65
66 sw_dev->chip.ops = &lan9303_indirect_phy_ops;
67
68 ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
69 if (ret != 0)
70 return ret;
71
72 dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
73
74 return 0;
75}
76
77static int lan9303_i2c_remove(struct i2c_client *client)
78{
79 struct lan9303_i2c *sw_dev;
80
81 sw_dev = i2c_get_clientdata(client);
82 if (!sw_dev)
83 return -ENODEV;
84
85 return lan9303_remove(&sw_dev->chip);
86}
87
88/*-------------------------------------------------------------------------*/
89
90static const struct i2c_device_id lan9303_i2c_id[] = {
91 { "lan9303", 0 },
92 { /* sentinel */ }
93};
94MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
95
96static const struct of_device_id lan9303_i2c_of_match[] = {
97 { .compatible = "smsc,lan9303-i2c", },
98 { /* sentinel */ },
99};
100MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
101
102static struct i2c_driver lan9303_i2c_driver = {
103 .driver = {
104 .name = "LAN9303_I2C",
105 .of_match_table = of_match_ptr(lan9303_i2c_of_match),
106 },
107 .probe = lan9303_i2c_probe,
108 .remove = lan9303_i2c_remove,
109 .id_table = lan9303_i2c_id,
110};
111module_i2c_driver(lan9303_i2c_driver);
112
113MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
114MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");
115MODULE_LICENSE("GPL v2");