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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>4 */5#include <linux/kernel.h>6#include <linux/module.h>7#include <linux/i2c.h>8#include <linux/of.h>9 10#include "lan9303.h"11 12struct lan9303_i2c {13 struct i2c_client *device;14 struct lan9303 chip;15};16 17static const struct regmap_config lan9303_i2c_regmap_config = {18 .reg_bits = 8,19 .val_bits = 32,20 .reg_stride = 1,21 .can_multi_write = true,22 .max_register = 0x0ff, /* address bits 0..1 are not used */23 .reg_format_endian = REGMAP_ENDIAN_LITTLE,24 25 .volatile_table = &lan9303_register_set,26 .wr_table = &lan9303_register_set,27 .rd_table = &lan9303_register_set,28 29 .cache_type = REGCACHE_NONE,30};31 32static int lan9303_i2c_probe(struct i2c_client *client)33{34 struct lan9303_i2c *sw_dev;35 int ret;36 37 sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),38 GFP_KERNEL);39 if (!sw_dev)40 return -ENOMEM;41 42 sw_dev->chip.regmap = devm_regmap_init_i2c(client,43 &lan9303_i2c_regmap_config);44 if (IS_ERR(sw_dev->chip.regmap)) {45 ret = PTR_ERR(sw_dev->chip.regmap);46 dev_err(&client->dev, "Failed to allocate register map: %d\n",47 ret);48 return ret;49 }50 51 /* link forward and backward */52 sw_dev->device = client;53 i2c_set_clientdata(client, sw_dev);54 sw_dev->chip.dev = &client->dev;55 56 sw_dev->chip.ops = &lan9303_indirect_phy_ops;57 58 ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);59 if (ret != 0)60 return ret;61 62 dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");63 64 return 0;65}66 67static void lan9303_i2c_remove(struct i2c_client *client)68{69 struct lan9303_i2c *sw_dev = i2c_get_clientdata(client);70 71 if (!sw_dev)72 return;73 74 lan9303_remove(&sw_dev->chip);75}76 77static void lan9303_i2c_shutdown(struct i2c_client *client)78{79 struct lan9303_i2c *sw_dev = i2c_get_clientdata(client);80 81 if (!sw_dev)82 return;83 84 lan9303_shutdown(&sw_dev->chip);85 86 i2c_set_clientdata(client, NULL);87}88 89/*-------------------------------------------------------------------------*/90 91static const struct i2c_device_id lan9303_i2c_id[] = {92 { "lan9303" },93 { /* sentinel */ }94};95MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);96 97static const struct of_device_id lan9303_i2c_of_match[] = {98 { .compatible = "smsc,lan9303-i2c", },99 { /* sentinel */ },100};101MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);102 103static struct i2c_driver lan9303_i2c_driver = {104 .driver = {105 .name = "LAN9303_I2C",106 .of_match_table = lan9303_i2c_of_match,107 },108 .probe = lan9303_i2c_probe,109 .remove = lan9303_i2c_remove,110 .shutdown = lan9303_i2c_shutdown,111 .id_table = lan9303_i2c_id,112};113module_i2c_driver(lan9303_i2c_driver);114 115MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");116MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");117MODULE_LICENSE("GPL v2");118