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(&i2c->dev, 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(dev->regmap[i])) {
32			return dev_err_probe(&i2c->dev, PTR_ERR(dev->regmap[i]),
33					     "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(i2c, 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(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(i2c);
65
66	if (!dev)
67		return;
68
69	if (dev->dev_ops->reset)
70		dev->dev_ops->reset(dev);
71
72	dsa_switch_shutdown(dev->ds);
73
74	i2c_set_clientdata(i2c, NULL);
75}
76
77static const struct i2c_device_id ksz9477_i2c_id[] = {
78	{ "ksz9477-switch", 0 },
79	{},
80};
81
82MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id);
83
84static const struct of_device_id ksz9477_dt_ids[] = {
85	{
86		.compatible = "microchip,ksz9477",
87		.data = &ksz_switch_chips[KSZ9477]
88	},
89	{
90		.compatible = "microchip,ksz9896",
91		.data = &ksz_switch_chips[KSZ9896]
92	},
93	{
94		.compatible = "microchip,ksz9897",
95		.data = &ksz_switch_chips[KSZ9897]
96	},
97	{
98		.compatible = "microchip,ksz9893",
99		.data = &ksz_switch_chips[KSZ9893]
100	},
101	{
102		.compatible = "microchip,ksz9563",
103		.data = &ksz_switch_chips[KSZ9563]
104	},
105	{
106		.compatible = "microchip,ksz8563",
107		.data = &ksz_switch_chips[KSZ8563]
108	},
109	{
110		.compatible = "microchip,ksz9567",
111		.data = &ksz_switch_chips[KSZ9567]
112	},
113	{},
114};
115MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
116
117static struct i2c_driver ksz9477_i2c_driver = {
118	.driver = {
119		.name	= "ksz9477-switch",
120		.of_match_table = ksz9477_dt_ids,
121	},
122	.probe = ksz9477_i2c_probe,
123	.remove	= ksz9477_i2c_remove,
124	.shutdown = ksz9477_i2c_shutdown,
125	.id_table = ksz9477_i2c_id,
126};
127
128module_i2c_driver(ksz9477_i2c_driver);
129
130MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
131MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
132MODULE_LICENSE("GPL v2");
133