1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * SPI bus interface to Cirrus Logic Madera codecs 4 * 5 * Copyright (C) 2015-2018 Cirrus Logic 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; version 2. 10 */ 11 12 #include <linux/device.h> 13 #include <linux/err.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/regmap.h> 18 #include <linux/spi/spi.h> 19 20 #include <linux/mfd/madera/core.h> 21 22 #include "madera.h" 23 24 static int madera_spi_probe(struct spi_device *spi) 25 { 26 const struct spi_device_id *id = spi_get_device_id(spi); 27 struct madera *madera; 28 const struct regmap_config *regmap_16bit_config = NULL; 29 const struct regmap_config *regmap_32bit_config = NULL; 30 const void *of_data; 31 unsigned long type; 32 const char *name; 33 int ret; 34 35 of_data = of_device_get_match_data(&spi->dev); 36 if (of_data) 37 type = (unsigned long)of_data; 38 else 39 type = id->driver_data; 40 41 switch (type) { 42 case CS47L35: 43 if (IS_ENABLED(CONFIG_MFD_CS47L35)) { 44 regmap_16bit_config = &cs47l35_16bit_spi_regmap; 45 regmap_32bit_config = &cs47l35_32bit_spi_regmap; 46 } 47 break; 48 case CS47L85: 49 case WM1840: 50 if (IS_ENABLED(CONFIG_MFD_CS47L85)) { 51 regmap_16bit_config = &cs47l85_16bit_spi_regmap; 52 regmap_32bit_config = &cs47l85_32bit_spi_regmap; 53 } 54 break; 55 case CS47L90: 56 case CS47L91: 57 if (IS_ENABLED(CONFIG_MFD_CS47L90)) { 58 regmap_16bit_config = &cs47l90_16bit_spi_regmap; 59 regmap_32bit_config = &cs47l90_32bit_spi_regmap; 60 } 61 break; 62 default: 63 dev_err(&spi->dev, 64 "Unknown Madera SPI device type %ld\n", type); 65 return -EINVAL; 66 } 67 68 name = madera_name_from_type(type); 69 70 if (!regmap_16bit_config) { 71 /* it's polite to say which codec isn't built into the kernel */ 72 dev_err(&spi->dev, 73 "Kernel does not include support for %s\n", name); 74 return -EINVAL; 75 } 76 77 madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL); 78 if (!madera) 79 return -ENOMEM; 80 81 madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config); 82 if (IS_ERR(madera->regmap)) { 83 ret = PTR_ERR(madera->regmap); 84 dev_err(&spi->dev, 85 "Failed to allocate 16-bit register map: %d\n", ret); 86 return ret; 87 } 88 89 madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config); 90 if (IS_ERR(madera->regmap_32bit)) { 91 ret = PTR_ERR(madera->regmap_32bit); 92 dev_err(&spi->dev, 93 "Failed to allocate 32-bit register map: %d\n", ret); 94 return ret; 95 } 96 97 madera->type = type; 98 madera->type_name = name; 99 madera->dev = &spi->dev; 100 madera->irq = spi->irq; 101 102 return madera_dev_init(madera); 103 } 104 105 static int madera_spi_remove(struct spi_device *spi) 106 { 107 struct madera *madera = spi_get_drvdata(spi); 108 109 madera_dev_exit(madera); 110 111 return 0; 112 } 113 114 static const struct spi_device_id madera_spi_ids[] = { 115 { "cs47l35", CS47L35 }, 116 { "cs47l85", CS47L85 }, 117 { "cs47l90", CS47L90 }, 118 { "cs47l91", CS47L91 }, 119 { "wm1840", WM1840 }, 120 { } 121 }; 122 MODULE_DEVICE_TABLE(spi, madera_spi_ids); 123 124 static struct spi_driver madera_spi_driver = { 125 .driver = { 126 .name = "madera", 127 .pm = &madera_pm_ops, 128 .of_match_table = of_match_ptr(madera_of_match), 129 }, 130 .probe = madera_spi_probe, 131 .remove = madera_spi_remove, 132 .id_table = madera_spi_ids, 133 }; 134 135 module_spi_driver(madera_spi_driver); 136 137 MODULE_DESCRIPTION("Madera SPI bus interface"); 138 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 139 MODULE_LICENSE("GPL v2"); 140