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