1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Microchip KSZ9477 series register access through I2C
4 *
5 * Copyright (C) 2018-2019 Microchip Technology Inc.
6 */
7
8#include <linux/i2c.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/regmap.h>
12
13#include "ksz_common.h"
14
15KSZ_REGMAP_TABLE(ksz9477, not_used, 16, 0, 0);
16
17static int ksz9477_i2c_probe(struct i2c_client *i2c)
18{
19 struct regmap_config rc;
20 struct ksz_device *dev;
21 int i, ret;
22
23 dev = ksz_switch_alloc(base: &i2c->dev, priv: i2c);
24 if (!dev)
25 return -ENOMEM;
26
27 for (i = 0; i < __KSZ_NUM_REGMAPS; i++) {
28 rc = ksz9477_regmap_config[i];
29 rc.lock_arg = &dev->regmap_mutex;
30 dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc);
31 if (IS_ERR(ptr: dev->regmap[i])) {
32 return dev_err_probe(dev: &i2c->dev, err: PTR_ERR(ptr: dev->regmap[i]),
33 fmt: "Failed to initialize regmap%i\n",
34 ksz9477_regmap_config[i].val_bits);
35 }
36 }
37
38 if (i2c->dev.platform_data)
39 dev->pdata = i2c->dev.platform_data;
40
41 dev->irq = i2c->irq;
42
43 ret = ksz_switch_register(dev);
44
45 /* Main DSA driver may not be started yet. */
46 if (ret)
47 return ret;
48
49 i2c_set_clientdata(client: i2c, data: dev);
50
51 return 0;
52}
53
54static void ksz9477_i2c_remove(struct i2c_client *i2c)
55{
56 struct ksz_device *dev = i2c_get_clientdata(client: i2c);
57
58 if (dev)
59 ksz_switch_remove(dev);
60}
61
62static void ksz9477_i2c_shutdown(struct i2c_client *i2c)
63{
64 struct ksz_device *dev = i2c_get_clientdata(client: i2c);
65
66 if (!dev)
67 return;
68
69 ksz_switch_shutdown(dev);
70
71 i2c_set_clientdata(client: i2c, NULL);
72}
73
74static const struct i2c_device_id ksz9477_i2c_id[] = {
75 { "ksz9477-switch", 0 },
76 {},
77};
78
79MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id);
80
81static const struct of_device_id ksz9477_dt_ids[] = {
82 {
83 .compatible = "microchip,ksz9477",
84 .data = &ksz_switch_chips[KSZ9477]
85 },
86 {
87 .compatible = "microchip,ksz9896",
88 .data = &ksz_switch_chips[KSZ9896]
89 },
90 {
91 .compatible = "microchip,ksz9897",
92 .data = &ksz_switch_chips[KSZ9897]
93 },
94 {
95 .compatible = "microchip,ksz9893",
96 .data = &ksz_switch_chips[KSZ9893]
97 },
98 {
99 .compatible = "microchip,ksz9563",
100 .data = &ksz_switch_chips[KSZ9563]
101 },
102 {
103 .compatible = "microchip,ksz8563",
104 .data = &ksz_switch_chips[KSZ8563]
105 },
106 {
107 .compatible = "microchip,ksz8567",
108 .data = &ksz_switch_chips[KSZ8567]
109 },
110 {
111 .compatible = "microchip,ksz9567",
112 .data = &ksz_switch_chips[KSZ9567]
113 },
114 {},
115};
116MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
117
118static struct i2c_driver ksz9477_i2c_driver = {
119 .driver = {
120 .name = "ksz9477-switch",
121 .of_match_table = ksz9477_dt_ids,
122 },
123 .probe = ksz9477_i2c_probe,
124 .remove = ksz9477_i2c_remove,
125 .shutdown = ksz9477_i2c_shutdown,
126 .id_table = ksz9477_i2c_id,
127};
128
129module_i2c_driver(ksz9477_i2c_driver);
130
131MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
132MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
133MODULE_LICENSE("GPL v2");
134

source code of linux/drivers/net/dsa/microchip/ksz9477_i2c.c