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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | // SPDX-License-Identifier: GPL-2.0 /* * SPI bus interface to Cirrus Logic Madera codecs * * Copyright (C) 2015-2018 Cirrus Logic * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by the * Free Software Foundation; version 2. */ #include <linux/device.h> #include <linux/err.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include <linux/mfd/madera/core.h> #include "madera.h" static int madera_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); struct madera *madera; const struct regmap_config *regmap_16bit_config = NULL; const struct regmap_config *regmap_32bit_config = NULL; const void *of_data; unsigned long type; const char *name; int ret; of_data = of_device_get_match_data(&spi->dev); if (of_data) type = (unsigned long)of_data; else type = id->driver_data; switch (type) { case CS47L35: if (IS_ENABLED(CONFIG_MFD_CS47L35)) { regmap_16bit_config = &cs47l35_16bit_spi_regmap; regmap_32bit_config = &cs47l35_32bit_spi_regmap; } break; case CS47L85: case WM1840: if (IS_ENABLED(CONFIG_MFD_CS47L85)) { regmap_16bit_config = &cs47l85_16bit_spi_regmap; regmap_32bit_config = &cs47l85_32bit_spi_regmap; } break; case CS47L90: case CS47L91: if (IS_ENABLED(CONFIG_MFD_CS47L90)) { regmap_16bit_config = &cs47l90_16bit_spi_regmap; regmap_32bit_config = &cs47l90_32bit_spi_regmap; } break; default: dev_err(&spi->dev, "Unknown Madera SPI device type %ld\n", type); return -EINVAL; } name = madera_name_from_type(type); if (!regmap_16bit_config) { /* it's polite to say which codec isn't built into the kernel */ dev_err(&spi->dev, "Kernel does not include support for %s\n", name); return -EINVAL; } madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL); if (!madera) return -ENOMEM; madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config); if (IS_ERR(madera->regmap)) { ret = PTR_ERR(madera->regmap); dev_err(&spi->dev, "Failed to allocate 16-bit register map: %d\n", ret); return ret; } madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config); if (IS_ERR(madera->regmap_32bit)) { ret = PTR_ERR(madera->regmap_32bit); dev_err(&spi->dev, "Failed to allocate 32-bit register map: %d\n", ret); return ret; } madera->type = type; madera->type_name = name; madera->dev = &spi->dev; madera->irq = spi->irq; return madera_dev_init(madera); } static int madera_spi_remove(struct spi_device *spi) { struct madera *madera = spi_get_drvdata(spi); madera_dev_exit(madera); return 0; } static const struct spi_device_id madera_spi_ids[] = { { "cs47l35", CS47L35 }, { "cs47l85", CS47L85 }, { "cs47l90", CS47L90 }, { "cs47l91", CS47L91 }, { "wm1840", WM1840 }, { } }; MODULE_DEVICE_TABLE(spi, madera_spi_ids); static struct spi_driver madera_spi_driver = { .driver = { .name = "madera", .pm = &madera_pm_ops, .of_match_table = of_match_ptr(madera_of_match), }, .probe = madera_spi_probe, .remove = madera_spi_remove, .id_table = madera_spi_ids, }; module_spi_driver(madera_spi_driver); MODULE_DESCRIPTION("Madera SPI bus interface"); MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); MODULE_LICENSE("GPL v2"); |