// 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, const struct i2c_device_id *id) { 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 int lan9303_i2c_remove(struct i2c_client *client) { struct lan9303_i2c *sw_dev; sw_dev = i2c_get_clientdata(client); if (!sw_dev) return -ENODEV; return lan9303_remove(&sw_dev->chip); } /*-------------------------------------------------------------------------*/ 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 = lan9303_i2c_probe, .remove = lan9303_i2c_remove, .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");