| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Microchip KSZ9477 series register access through I2C |
| 4 | * |
| 5 | * Copyright (C) 2018-2019 Microchip Technology Inc. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/i2c.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/regmap.h> |
| 12 | |
| 13 | #include "ksz_common.h" |
| 14 | |
| 15 | KSZ_REGMAP_TABLE(ksz9477, not_used, 16, 0, 0); |
| 16 | |
| 17 | static int ksz9477_i2c_probe(struct i2c_client *i2c, |
| 18 | const struct i2c_device_id *i2c_id) |
| 19 | { |
| 20 | struct regmap_config rc; |
| 21 | struct ksz_device *dev; |
| 22 | int i, ret; |
| 23 | |
| 24 | dev = ksz_switch_alloc(&i2c->dev, i2c); |
| 25 | if (!dev) |
| 26 | return -ENOMEM; |
| 27 | |
| 28 | for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) { |
| 29 | rc = ksz9477_regmap_config[i]; |
| 30 | rc.lock_arg = &dev->regmap_mutex; |
| 31 | dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc); |
| 32 | if (IS_ERR(dev->regmap[i])) { |
| 33 | ret = PTR_ERR(dev->regmap[i]); |
| 34 | dev_err(&i2c->dev, |
| 35 | "Failed to initialize regmap%i: %d\n", |
| 36 | ksz9477_regmap_config[i].val_bits, ret); |
| 37 | return ret; |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | if (i2c->dev.platform_data) |
| 42 | dev->pdata = i2c->dev.platform_data; |
| 43 | |
| 44 | ret = ksz9477_switch_register(dev); |
| 45 | |
| 46 | /* Main DSA driver may not be started yet. */ |
| 47 | if (ret) |
| 48 | return ret; |
| 49 | |
| 50 | i2c_set_clientdata(i2c, dev); |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static int ksz9477_i2c_remove(struct i2c_client *i2c) |
| 56 | { |
| 57 | struct ksz_device *dev = i2c_get_clientdata(i2c); |
| 58 | |
| 59 | ksz_switch_remove(dev); |
| 60 | |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static void ksz9477_i2c_shutdown(struct i2c_client *i2c) |
| 65 | { |
| 66 | struct ksz_device *dev = i2c_get_clientdata(i2c); |
| 67 | |
| 68 | if (dev && dev->dev_ops->shutdown) |
| 69 | dev->dev_ops->shutdown(dev); |
| 70 | } |
| 71 | |
| 72 | static const struct i2c_device_id ksz9477_i2c_id[] = { |
| 73 | { "ksz9477-switch", 0 }, |
| 74 | {}, |
| 75 | }; |
| 76 | |
| 77 | MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id); |
| 78 | |
| 79 | static const struct of_device_id ksz9477_dt_ids[] = { |
| 80 | { .compatible = "microchip,ksz9477" }, |
| 81 | { .compatible = "microchip,ksz9897" }, |
| 82 | { .compatible = "microchip,ksz9567" }, |
| 83 | {}, |
| 84 | }; |
| 85 | MODULE_DEVICE_TABLE(of, ksz9477_dt_ids); |
| 86 | |
| 87 | static struct i2c_driver ksz9477_i2c_driver = { |
| 88 | .driver = { |
| 89 | .name = "ksz9477-switch", |
| 90 | .owner = THIS_MODULE, |
| 91 | .of_match_table = of_match_ptr(ksz9477_dt_ids), |
| 92 | }, |
| 93 | .probe = ksz9477_i2c_probe, |
| 94 | .remove = ksz9477_i2c_remove, |
| 95 | .shutdown = ksz9477_i2c_shutdown, |
| 96 | .id_table = ksz9477_i2c_id, |
| 97 | }; |
| 98 | |
| 99 | module_i2c_driver(ksz9477_i2c_driver); |
| 100 | |
| 101 | MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>"); |
| 102 | MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver"); |
| 103 | MODULE_LICENSE("GPL v2"); |