1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Microchip KSZ9477 series register access through I2C
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2018-2019 Microchip Technology Inc.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/i2c.h>
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/regmap.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "ksz_common.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun KSZ_REGMAP_TABLE(ksz9477, not_used, 16, 0, 0);
16*4882a593Smuzhiyun
ksz9477_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * i2c_id)17*4882a593Smuzhiyun static int ksz9477_i2c_probe(struct i2c_client *i2c,
18*4882a593Smuzhiyun const struct i2c_device_id *i2c_id)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun struct regmap_config rc;
21*4882a593Smuzhiyun struct ksz_device *dev;
22*4882a593Smuzhiyun int i, ret;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun dev = ksz_switch_alloc(&i2c->dev, i2c);
25*4882a593Smuzhiyun if (!dev)
26*4882a593Smuzhiyun return -ENOMEM;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) {
29*4882a593Smuzhiyun rc = ksz9477_regmap_config[i];
30*4882a593Smuzhiyun rc.lock_arg = &dev->regmap_mutex;
31*4882a593Smuzhiyun dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc);
32*4882a593Smuzhiyun if (IS_ERR(dev->regmap[i])) {
33*4882a593Smuzhiyun ret = PTR_ERR(dev->regmap[i]);
34*4882a593Smuzhiyun dev_err(&i2c->dev,
35*4882a593Smuzhiyun "Failed to initialize regmap%i: %d\n",
36*4882a593Smuzhiyun ksz9477_regmap_config[i].val_bits, ret);
37*4882a593Smuzhiyun return ret;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if (i2c->dev.platform_data)
42*4882a593Smuzhiyun dev->pdata = i2c->dev.platform_data;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun ret = ksz9477_switch_register(dev);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun /* Main DSA driver may not be started yet. */
47*4882a593Smuzhiyun if (ret)
48*4882a593Smuzhiyun return ret;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun i2c_set_clientdata(i2c, dev);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun return 0;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
ksz9477_i2c_remove(struct i2c_client * i2c)55*4882a593Smuzhiyun static int ksz9477_i2c_remove(struct i2c_client *i2c)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun struct ksz_device *dev = i2c_get_clientdata(i2c);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ksz_switch_remove(dev);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun return 0;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
ksz9477_i2c_shutdown(struct i2c_client * i2c)64*4882a593Smuzhiyun static void ksz9477_i2c_shutdown(struct i2c_client *i2c)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun struct ksz_device *dev = i2c_get_clientdata(i2c);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun if (dev && dev->dev_ops->shutdown)
69*4882a593Smuzhiyun dev->dev_ops->shutdown(dev);
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun static const struct i2c_device_id ksz9477_i2c_id[] = {
73*4882a593Smuzhiyun { "ksz9477-switch", 0 },
74*4882a593Smuzhiyun {},
75*4882a593Smuzhiyun };
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun static const struct of_device_id ksz9477_dt_ids[] = {
80*4882a593Smuzhiyun { .compatible = "microchip,ksz9477" },
81*4882a593Smuzhiyun { .compatible = "microchip,ksz9897" },
82*4882a593Smuzhiyun { .compatible = "microchip,ksz9893" },
83*4882a593Smuzhiyun { .compatible = "microchip,ksz9563" },
84*4882a593Smuzhiyun { .compatible = "microchip,ksz9567" },
85*4882a593Smuzhiyun {},
86*4882a593Smuzhiyun };
87*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static struct i2c_driver ksz9477_i2c_driver = {
90*4882a593Smuzhiyun .driver = {
91*4882a593Smuzhiyun .name = "ksz9477-switch",
92*4882a593Smuzhiyun .of_match_table = of_match_ptr(ksz9477_dt_ids),
93*4882a593Smuzhiyun },
94*4882a593Smuzhiyun .probe = ksz9477_i2c_probe,
95*4882a593Smuzhiyun .remove = ksz9477_i2c_remove,
96*4882a593Smuzhiyun .shutdown = ksz9477_i2c_shutdown,
97*4882a593Smuzhiyun .id_table = ksz9477_i2c_id,
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun module_i2c_driver(ksz9477_i2c_driver);
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
103*4882a593Smuzhiyun MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
104*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
105