| 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 SPI |
| 4 | * |
| 5 | * Copyright (C) 2017-2019 Microchip Technology Inc. |
| 6 | */ |
| 7 | |
| 8 | #include <asm/unaligned.h> |
| 9 | |
| 10 | #include <linux/delay.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/regmap.h> |
| 14 | #include <linux/spi/spi.h> |
| 15 | |
| 16 | #include "ksz_common.h" |
| 17 | |
| 18 | #define SPI_ADDR_SHIFT 24 |
| 19 | #define SPI_ADDR_ALIGN 3 |
| 20 | #define SPI_TURNAROUND_SHIFT 5 |
| 21 | |
| 22 | KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT, |
| 23 | SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN); |
| 24 | |
| 25 | static int ksz9477_spi_probe(struct spi_device *spi) |
| 26 | { |
| 27 | struct regmap_config rc; |
| 28 | struct ksz_device *dev; |
| 29 | int i, ret; |
| 30 | |
| 31 | dev = ksz_switch_alloc(&spi->dev, spi); |
| 32 | if (!dev) |
| 33 | return -ENOMEM; |
| 34 | |
| 35 | for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) { |
| 36 | rc = ksz9477_regmap_config[i]; |
| 37 | rc.lock_arg = &dev->regmap_mutex; |
| 38 | dev->regmap[i] = devm_regmap_init_spi(spi, &rc); |
| 39 | if (IS_ERR(dev->regmap[i])) { |
| 40 | ret = PTR_ERR(dev->regmap[i]); |
| 41 | dev_err(&spi->dev, |
| 42 | "Failed to initialize regmap%i: %d\n", |
| 43 | ksz9477_regmap_config[i].val_bits, ret); |
| 44 | return ret; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | if (spi->dev.platform_data) |
| 49 | dev->pdata = spi->dev.platform_data; |
| 50 | |
| 51 | ret = ksz9477_switch_register(dev); |
| 52 | |
| 53 | /* Main DSA driver may not be started yet. */ |
| 54 | if (ret) |
| 55 | return ret; |
| 56 | |
| 57 | spi_set_drvdata(spi, dev); |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static int ksz9477_spi_remove(struct spi_device *spi) |
| 63 | { |
| 64 | struct ksz_device *dev = spi_get_drvdata(spi); |
| 65 | |
| 66 | if (dev) |
| 67 | ksz_switch_remove(dev); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static void ksz9477_spi_shutdown(struct spi_device *spi) |
| 73 | { |
| 74 | struct ksz_device *dev = spi_get_drvdata(spi); |
| 75 | |
| 76 | if (dev && dev->dev_ops->shutdown) |
| 77 | dev->dev_ops->shutdown(dev); |
| 78 | } |
| 79 | |
| 80 | static const struct of_device_id ksz9477_dt_ids[] = { |
| 81 | { .compatible = "microchip,ksz9477" }, |
| 82 | { .compatible = "microchip,ksz9897" }, |
| 83 | { .compatible = "microchip,ksz9893" }, |
| 84 | { .compatible = "microchip,ksz9563" }, |
| 85 | { .compatible = "microchip,ksz8563" }, |
| 86 | { .compatible = "microchip,ksz9567" }, |
| 87 | {}, |
| 88 | }; |
| 89 | MODULE_DEVICE_TABLE(of, ksz9477_dt_ids); |
| 90 | |
| 91 | static const struct spi_device_id ksz9477_spi_ids[] = { |
| 92 | { "ksz9477" }, |
| 93 | { "ksz9897" }, |
| 94 | { "ksz9893" }, |
| 95 | { "ksz9563" }, |
| 96 | { "ksz8563" }, |
| 97 | { "ksz9567" }, |
| 98 | { }, |
| 99 | }; |
| 100 | MODULE_DEVICE_TABLE(spi, ksz9477_spi_ids); |
| 101 | |
| 102 | static struct spi_driver ksz9477_spi_driver = { |
| 103 | .driver = { |
| 104 | .name = "ksz9477-switch", |
| 105 | .owner = THIS_MODULE, |
| 106 | .of_match_table = of_match_ptr(ksz9477_dt_ids), |
| 107 | }, |
| 108 | .id_table = ksz9477_spi_ids, |
| 109 | .probe = ksz9477_spi_probe, |
| 110 | .remove = ksz9477_spi_remove, |
| 111 | .shutdown = ksz9477_spi_shutdown, |
| 112 | }; |
| 113 | |
| 114 | module_spi_driver(ksz9477_spi_driver); |
| 115 | |
| 116 | MODULE_ALIAS("spi:ksz9477"); |
| 117 | MODULE_ALIAS("spi:ksz9897"); |
| 118 | MODULE_ALIAS("spi:ksz9893"); |
| 119 | MODULE_ALIAS("spi:ksz9563"); |
| 120 | MODULE_ALIAS("spi:ksz8563"); |
| 121 | MODULE_ALIAS("spi:ksz9567"); |
| 122 | MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>"); |
| 123 | MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver"); |
| 124 | MODULE_LICENSE("GPL"); |