1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Microchip KSZ9477 series register access through I2C 4 * 5 * Copyright (C) 2018-2024 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 { 19 const struct ksz_chip_data *chip; 20 struct device *ddev = &i2c->dev; 21 struct regmap_config rc; 22 struct ksz_device *dev; 23 int i, ret; 24 25 dev = ksz_switch_alloc(&i2c->dev, i2c); 26 if (!dev) 27 return -ENOMEM; 28 29 chip = device_get_match_data(ddev); 30 if (!chip) 31 return -EINVAL; 32 33 /* Save chip id to do special initialization when probing. */ 34 dev->chip_id = chip->chip_id; 35 for (i = 0; i < __KSZ_NUM_REGMAPS; i++) { 36 rc = ksz9477_regmap_config[i]; 37 rc.lock_arg = &dev->regmap_mutex; 38 dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc); 39 if (IS_ERR(dev->regmap[i])) { 40 return dev_err_probe(&i2c->dev, PTR_ERR(dev->regmap[i]), 41 "Failed to initialize regmap%i\n", 42 ksz9477_regmap_config[i].val_bits); 43 } 44 } 45 46 if (i2c->dev.platform_data) 47 dev->pdata = i2c->dev.platform_data; 48 49 dev->irq = i2c->irq; 50 51 ret = ksz_switch_register(dev); 52 53 /* Main DSA driver may not be started yet. */ 54 if (ret) 55 return ret; 56 57 i2c_set_clientdata(i2c, dev); 58 59 return 0; 60 } 61 62 static void ksz9477_i2c_remove(struct i2c_client *i2c) 63 { 64 struct ksz_device *dev = i2c_get_clientdata(i2c); 65 66 if (dev) 67 ksz_switch_remove(dev); 68 } 69 70 static void ksz9477_i2c_shutdown(struct i2c_client *i2c) 71 { 72 struct ksz_device *dev = i2c_get_clientdata(i2c); 73 74 if (!dev) 75 return; 76 77 ksz_switch_shutdown(dev); 78 79 i2c_set_clientdata(i2c, NULL); 80 } 81 82 static const struct i2c_device_id ksz9477_i2c_id[] = { 83 { "ksz9477-switch" }, 84 {} 85 }; 86 87 MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id); 88 89 static const struct of_device_id ksz9477_dt_ids[] = { 90 { 91 .compatible = "microchip,ksz9477", 92 .data = &ksz_switch_chips[KSZ9477] 93 }, 94 { 95 .compatible = "microchip,ksz9896", 96 .data = &ksz_switch_chips[KSZ9896] 97 }, 98 { 99 .compatible = "microchip,ksz9897", 100 .data = &ksz_switch_chips[KSZ9897] 101 }, 102 { 103 .compatible = "microchip,ksz9893", 104 .data = &ksz_switch_chips[KSZ9893] 105 }, 106 { 107 .compatible = "microchip,ksz9563", 108 .data = &ksz_switch_chips[KSZ9563] 109 }, 110 { 111 .compatible = "microchip,ksz8563", 112 .data = &ksz_switch_chips[KSZ8563] 113 }, 114 { 115 .compatible = "microchip,ksz8567", 116 .data = &ksz_switch_chips[KSZ8567] 117 }, 118 { 119 .compatible = "microchip,ksz9567", 120 .data = &ksz_switch_chips[KSZ9567] 121 }, 122 { 123 .compatible = "microchip,lan9646", 124 .data = &ksz_switch_chips[LAN9646] 125 }, 126 {}, 127 }; 128 MODULE_DEVICE_TABLE(of, ksz9477_dt_ids); 129 130 static struct i2c_driver ksz9477_i2c_driver = { 131 .driver = { 132 .name = "ksz9477-switch", 133 .of_match_table = ksz9477_dt_ids, 134 }, 135 .probe = ksz9477_i2c_probe, 136 .remove = ksz9477_i2c_remove, 137 .shutdown = ksz9477_i2c_shutdown, 138 .id_table = ksz9477_i2c_id, 139 }; 140 141 module_i2c_driver(ksz9477_i2c_driver); 142 143 MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>"); 144 MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver"); 145 MODULE_LICENSE("GPL v2"); 146