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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | // 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) { 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 = 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"); |