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			     const struct i2c_device_id *i2c_id)
19{
20	struct regmap_config rc;
21	struct ksz_device *dev;
22	int i, ret;
23
24	dev = ksz_switch_alloc(&i2c->dev, i2c);
25	if (!dev)
26		return -ENOMEM;
27
28	for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) {
29		rc = ksz9477_regmap_config[i];
30		rc.lock_arg = &dev->regmap_mutex;
31		dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc);
32		if (IS_ERR(dev->regmap[i])) {
33			ret = PTR_ERR(dev->regmap[i]);
34			dev_err(&i2c->dev,
35				"Failed to initialize regmap%i: %d\n",
36				ksz9477_regmap_config[i].val_bits, ret);
37			return ret;
38		}
39	}
40
41	if (i2c->dev.platform_data)
42		dev->pdata = i2c->dev.platform_data;
43
44	ret = ksz9477_switch_register(dev);
45
46	/* Main DSA driver may not be started yet. */
47	if (ret)
48		return ret;
49
50	i2c_set_clientdata(i2c, dev);
51
52	return 0;
53}
54
55static int ksz9477_i2c_remove(struct i2c_client *i2c)
56{
57	struct ksz_device *dev = i2c_get_clientdata(i2c);
58
59	ksz_switch_remove(dev);
60
61	return 0;
62}
63
64static void ksz9477_i2c_shutdown(struct i2c_client *i2c)
65{
66	struct ksz_device *dev = i2c_get_clientdata(i2c);
67
68	if (dev && dev->dev_ops->shutdown)
69		dev->dev_ops->shutdown(dev);
70}
71
72static const struct i2c_device_id ksz9477_i2c_id[] = {
73	{ "ksz9477-switch", 0 },
74	{},
75};
76
77MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id);
78
79static const struct of_device_id ksz9477_dt_ids[] = {
80	{ .compatible = "microchip,ksz9477" },
81	{ .compatible = "microchip,ksz9897" },
82	{ .compatible = "microchip,ksz9893" },
83	{ .compatible = "microchip,ksz9563" },
84	{ .compatible = "microchip,ksz9567" },
85	{},
86};
87MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
88
89static struct i2c_driver ksz9477_i2c_driver = {
90	.driver = {
91		.name	= "ksz9477-switch",
92		.of_match_table = of_match_ptr(ksz9477_dt_ids),
93	},
94	.probe	= ksz9477_i2c_probe,
95	.remove	= ksz9477_i2c_remove,
96	.shutdown = ksz9477_i2c_shutdown,
97	.id_table = ksz9477_i2c_id,
98};
99
100module_i2c_driver(ksz9477_i2c_driver);
101
102MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
103MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
104MODULE_LICENSE("GPL v2");
105