1/*
  2 * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
  3 *
  4 * This program is free software; you can redistribute it and/or
  5 * modify it under the terms of the GNU General Public License
  6 * version 2, as published by the Free Software Foundation.
  7 *
  8 * This program is distributed in the hope that it will be useful,
  9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 11 * GNU General Public License for more details.
 12 *
 13 */
 14#include <linux/kernel.h>
 15#include <linux/module.h>
 16#include <linux/i2c.h>
 17#include <linux/of.h>
 18
 19#include "lan9303.h"
 20
 21struct lan9303_i2c {
 22	struct i2c_client *device;
 23	struct lan9303 chip;
 24};
 25
 26static const struct regmap_config lan9303_i2c_regmap_config = {
 27	.reg_bits = 8,
 28	.val_bits = 32,
 29	.reg_stride = 1,
 30	.can_multi_write = true,
 31	.max_register = 0x0ff, /* address bits 0..1 are not used */
 32	.reg_format_endian = REGMAP_ENDIAN_LITTLE,
 33
 34	.volatile_table = &lan9303_register_set,
 35	.wr_table = &lan9303_register_set,
 36	.rd_table = &lan9303_register_set,
 37
 38	.cache_type = REGCACHE_NONE,
 39};
 40
 41static int lan9303_i2c_probe(struct i2c_client *client,
 42			     const struct i2c_device_id *id)
 43{
 44	struct lan9303_i2c *sw_dev;
 45	int ret;
 46
 47	sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
 48			      GFP_KERNEL);
 49	if (!sw_dev)
 50		return -ENOMEM;
 51
 52	sw_dev->chip.regmap = devm_regmap_init_i2c(client,
 53						   &lan9303_i2c_regmap_config);
 54	if (IS_ERR(sw_dev->chip.regmap)) {
 55		ret = PTR_ERR(sw_dev->chip.regmap);
 56		dev_err(&client->dev, "Failed to allocate register map: %d\n",
 57			ret);
 58		return ret;
 59	}
 60
 61	/* link forward and backward */
 62	sw_dev->device = client;
 63	i2c_set_clientdata(client, sw_dev);
 64	sw_dev->chip.dev = &client->dev;
 65
 66	sw_dev->chip.ops = &lan9303_indirect_phy_ops;
 67
 68	ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
 69	if (ret != 0)
 70		return ret;
 71
 72	dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
 73
 74	return 0;
 75}
 76
 77static int lan9303_i2c_remove(struct i2c_client *client)
 78{
 79	struct lan9303_i2c *sw_dev;
 80
 81	sw_dev = i2c_get_clientdata(client);
 82	if (!sw_dev)
 83		return -ENODEV;
 84
 85	return lan9303_remove(&sw_dev->chip);
 86}
 87
 88/*-------------------------------------------------------------------------*/
 89
 90static const struct i2c_device_id lan9303_i2c_id[] = {
 91	{ "lan9303", 0 },
 92	{ /* sentinel */ }
 93};
 94MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
 95
 96static const struct of_device_id lan9303_i2c_of_match[] = {
 97	{ .compatible = "smsc,lan9303-i2c", },
 98	{ /* sentinel */ },
 99};
100MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
101
102static struct i2c_driver lan9303_i2c_driver = {
103	.driver = {
104		.name = "LAN9303_I2C",
105		.of_match_table = of_match_ptr(lan9303_i2c_of_match),
106	},
107	.probe = lan9303_i2c_probe,
108	.remove = lan9303_i2c_remove,
109	.id_table = lan9303_i2c_id,
110};
111module_i2c_driver(lan9303_i2c_driver);
112
113MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
114MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");
115MODULE_LICENSE("GPL v2");