tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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,ksz9567" },
83 {},
84};
85MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
86
87static struct i2c_driver ksz9477_i2c_driver = {
88 .driver = {
89 .name = "ksz9477-switch",
90 .of_match_table = of_match_ptr(ksz9477_dt_ids),
91 },
92 .probe = ksz9477_i2c_probe,
93 .remove = ksz9477_i2c_remove,
94 .shutdown = ksz9477_i2c_shutdown,
95 .id_table = ksz9477_i2c_id,
96};
97
98module_i2c_driver(ksz9477_i2c_driver);
99
100MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
101MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
102MODULE_LICENSE("GPL v2");