LXR linux/drivers/net/dsa/lan9303

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   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                             const struct i2c_device_id *id)
  34{
  35        struct lan9303_i2c *sw_dev;
  36        int ret;
  37
  38        sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
  39                              GFP_KERNEL);
  40        if (!sw_dev)
  41                return -ENOMEM;
  42
  43        sw_dev->chip.regmap = devm_regmap_init_i2c(client,
  44                                                   &lan9303_i2c_regmap_config);
  45        if (IS_ERR(sw_dev->chip.regmap)) {
  46                ret = PTR_ERR(sw_dev->chip.regmap);
  47                dev_err(&client->dev, "Failed to allocate register map: %d\n",
  48                        ret);
  49                return ret;
  50        }
  51
  52        /* link forward and backward */
  53        sw_dev->device = client;
  54        i2c_set_clientdata(client, sw_dev);
  55        sw_dev->chip.dev = &client->dev;
  56
  57        sw_dev->chip.ops = &lan9303_indirect_phy_ops;
  58
  59        ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
  60        if (ret != 0)
  61                return ret;
  62
  63        dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
  64
  65        return 0;
  66}
  67
  68static int lan9303_i2c_remove(struct i2c_client *client)
  69{
  70        struct lan9303_i2c *sw_dev;
  71
  72        sw_dev = i2c_get_clientdata(client);
  73        if (!sw_dev)
  74                return -ENODEV;
  75
  76        return lan9303_remove(&sw_dev->chip);
  77}
  78
  79/*-------------------------------------------------------------------------*/
  80
  81static const struct i2c_device_id lan9303_i2c_id[] = {
  82        { "lan9303", 0 },
  83        { /* sentinel */ }
  84};
  85MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
  86
  87static const struct of_device_id lan9303_i2c_of_match[] = {
  88        { .compatible = "smsc,lan9303-i2c", },
  89        { /* sentinel */ },
  90};
  91MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
  92
  93static struct i2c_driver lan9303_i2c_driver = {
  94        .driver = {
  95                .name = "LAN9303_I2C",
  96                .of_match_table = of_match_ptr(lan9303_i2c_of_match),
  97        },
  98        .probe = lan9303_i2c_probe,
  99        .remove = lan9303_i2c_remove,
 100        .id_table = lan9303_i2c_id,
 101};
 102module_i2c_driver(lan9303_i2c_driver);
 103
 104MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
 105MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode");
 106MODULE_LICENSE("GPL v2");
 107