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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include "lan9303.h"
struct lan9303_i2c {
struct i2c_client *device;
struct lan9303 chip;
};
static const struct regmap_config lan9303_i2c_regmap_config = {
.reg_bits = 8,
.val_bits = 32,
.reg_stride = 1,
.can_multi_write = true,
.max_register = 0x0ff, /* address bits 0..1 are not used */
.reg_format_endian = REGMAP_ENDIAN_LITTLE,
.volatile_table = &lan9303_register_set,
.wr_table = &lan9303_register_set,
.rd_table = &lan9303_register_set,
.cache_type = REGCACHE_NONE,
};
static int lan9303_i2c_probe(struct i2c_client *client)
{
struct lan9303_i2c *sw_dev;
int ret;
sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
GFP_KERNEL);
if (!sw_dev)
return -ENOMEM;
sw_dev->chip.regmap = devm_regmap_init_i2c(client,
&lan9303_i2c_regmap_config);
if (IS_ERR(sw_dev->chip.regmap)) {
ret = PTR_ERR(sw_dev->chip.regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
/* link forward and backward */
sw_dev->device = client;
i2c_set_clientdata(client, sw_dev);
sw_dev->chip.dev = &client->dev;
sw_dev->chip.ops = &lan9303_indirect_phy_ops;
ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
if (ret != 0)
return ret;
dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
return 0;
}
static void lan9303_i2c_remove(struct i2c_client *client)
{
struct lan9303_i2c *sw_dev = i2c_get_clientdata(client);
if (!sw_dev)
return;
lan9303_remove(&sw_dev->chip);
}
static void lan9303_i2c_shutdown(struct i2c_client *client)
{
struct lan9303_i2c *sw_dev = i2c_get_clientdata(client);
if (!sw_dev)
return;
lan9303_shutdown(&sw_dev->chip);
i2c_set_clientdata(client, NULL);
}
/*-------------------------------------------------------------------------*/
static const struct i2c_device_id lan9303_i2c_id[] = {
{ "lan9303", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
static const struct of_device_id lan9303_i2c_of_match[] = {
{ .compatible = "smsc,lan9303-i2c", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
static struct i2c_driver lan9303_i2c_driver = {
.driver = {
.name = "LAN9303_I2C",
.of_match_table = of_match_ptr(lan9303_i2c_of_match),
},
.probe_new = lan9303_i2c_probe,
.remove = lan9303_i2c_remove,
.shutdown = lan9303_i2c_shutdown,
.id_table = lan9303_i2c_id,
};
module_i2c_driver(lan9303_i2c_driver);
MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");
MODULE_LICENSE("GPL v2");
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