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 < ARRAY_SIZE(ksz9477_regmap_config); 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 = of_match_ptr(ksz9477_dt_ids),
121	},
122	.probe_new = 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");