| // 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 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 = 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"); |