1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun #include <linux/kernel.h>
6*4882a593Smuzhiyun #include <linux/module.h>
7*4882a593Smuzhiyun #include <linux/i2c.h>
8*4882a593Smuzhiyun #include <linux/of.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "lan9303.h"
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct lan9303_i2c {
13*4882a593Smuzhiyun struct i2c_client *device;
14*4882a593Smuzhiyun struct lan9303 chip;
15*4882a593Smuzhiyun };
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static const struct regmap_config lan9303_i2c_regmap_config = {
18*4882a593Smuzhiyun .reg_bits = 8,
19*4882a593Smuzhiyun .val_bits = 32,
20*4882a593Smuzhiyun .reg_stride = 1,
21*4882a593Smuzhiyun .can_multi_write = true,
22*4882a593Smuzhiyun .max_register = 0x0ff, /* address bits 0..1 are not used */
23*4882a593Smuzhiyun .reg_format_endian = REGMAP_ENDIAN_LITTLE,
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun .volatile_table = &lan9303_register_set,
26*4882a593Smuzhiyun .wr_table = &lan9303_register_set,
27*4882a593Smuzhiyun .rd_table = &lan9303_register_set,
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun .cache_type = REGCACHE_NONE,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
lan9303_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)32*4882a593Smuzhiyun static int lan9303_i2c_probe(struct i2c_client *client,
33*4882a593Smuzhiyun const struct i2c_device_id *id)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun struct lan9303_i2c *sw_dev;
36*4882a593Smuzhiyun int ret;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
39*4882a593Smuzhiyun GFP_KERNEL);
40*4882a593Smuzhiyun if (!sw_dev)
41*4882a593Smuzhiyun return -ENOMEM;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun sw_dev->chip.regmap = devm_regmap_init_i2c(client,
44*4882a593Smuzhiyun &lan9303_i2c_regmap_config);
45*4882a593Smuzhiyun if (IS_ERR(sw_dev->chip.regmap)) {
46*4882a593Smuzhiyun ret = PTR_ERR(sw_dev->chip.regmap);
47*4882a593Smuzhiyun dev_err(&client->dev, "Failed to allocate register map: %d\n",
48*4882a593Smuzhiyun ret);
49*4882a593Smuzhiyun return ret;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun /* link forward and backward */
53*4882a593Smuzhiyun sw_dev->device = client;
54*4882a593Smuzhiyun i2c_set_clientdata(client, sw_dev);
55*4882a593Smuzhiyun sw_dev->chip.dev = &client->dev;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun sw_dev->chip.ops = &lan9303_indirect_phy_ops;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
60*4882a593Smuzhiyun if (ret != 0)
61*4882a593Smuzhiyun return ret;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun return 0;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
lan9303_i2c_remove(struct i2c_client * client)68*4882a593Smuzhiyun static int lan9303_i2c_remove(struct i2c_client *client)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun struct lan9303_i2c *sw_dev;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun sw_dev = i2c_get_clientdata(client);
73*4882a593Smuzhiyun if (!sw_dev)
74*4882a593Smuzhiyun return -ENODEV;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun return lan9303_remove(&sw_dev->chip);
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun /*-------------------------------------------------------------------------*/
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun static const struct i2c_device_id lan9303_i2c_id[] = {
82*4882a593Smuzhiyun { "lan9303", 0 },
83*4882a593Smuzhiyun { /* sentinel */ }
84*4882a593Smuzhiyun };
85*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun static const struct of_device_id lan9303_i2c_of_match[] = {
88*4882a593Smuzhiyun { .compatible = "smsc,lan9303-i2c", },
89*4882a593Smuzhiyun { /* sentinel */ },
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun static struct i2c_driver lan9303_i2c_driver = {
94*4882a593Smuzhiyun .driver = {
95*4882a593Smuzhiyun .name = "LAN9303_I2C",
96*4882a593Smuzhiyun .of_match_table = of_match_ptr(lan9303_i2c_of_match),
97*4882a593Smuzhiyun },
98*4882a593Smuzhiyun .probe = lan9303_i2c_probe,
99*4882a593Smuzhiyun .remove = lan9303_i2c_remove,
100*4882a593Smuzhiyun .id_table = lan9303_i2c_id,
101*4882a593Smuzhiyun };
102*4882a593Smuzhiyun module_i2c_driver(lan9303_i2c_driver);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
105*4882a593Smuzhiyun MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");
106*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
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