1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * I2C bus interface to Cirrus Logic Madera codecs 4 * 5 * Copyright (C) 2015-2018 Cirrus Logic 6 */ 7 8 #include <linux/device.h> 9 #include <linux/err.h> 10 #include <linux/i2c.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/regmap.h> 14 15 #include <linux/mfd/madera/core.h> 16 17 #include "madera.h" 18 19 static int madera_i2c_probe(struct i2c_client *i2c) 20 { 21 const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 22 struct madera *madera; 23 const struct regmap_config *regmap_16bit_config = NULL; 24 const struct regmap_config *regmap_32bit_config = NULL; 25 const void *of_data; 26 unsigned long type; 27 const char *name; 28 int ret; 29 30 of_data = of_device_get_match_data(&i2c->dev); 31 if (of_data) 32 type = (unsigned long)of_data; 33 else 34 type = id->driver_data; 35 36 switch (type) { 37 case CS47L15: 38 if (IS_ENABLED(CONFIG_MFD_CS47L15)) { 39 regmap_16bit_config = &cs47l15_16bit_i2c_regmap; 40 regmap_32bit_config = &cs47l15_32bit_i2c_regmap; 41 } 42 break; 43 case CS47L35: 44 if (IS_ENABLED(CONFIG_MFD_CS47L35)) { 45 regmap_16bit_config = &cs47l35_16bit_i2c_regmap; 46 regmap_32bit_config = &cs47l35_32bit_i2c_regmap; 47 } 48 break; 49 case CS47L85: 50 case WM1840: 51 if (IS_ENABLED(CONFIG_MFD_CS47L85)) { 52 regmap_16bit_config = &cs47l85_16bit_i2c_regmap; 53 regmap_32bit_config = &cs47l85_32bit_i2c_regmap; 54 } 55 break; 56 case CS47L90: 57 case CS47L91: 58 if (IS_ENABLED(CONFIG_MFD_CS47L90)) { 59 regmap_16bit_config = &cs47l90_16bit_i2c_regmap; 60 regmap_32bit_config = &cs47l90_32bit_i2c_regmap; 61 } 62 break; 63 case CS42L92: 64 case CS47L92: 65 case CS47L93: 66 if (IS_ENABLED(CONFIG_MFD_CS47L92)) { 67 regmap_16bit_config = &cs47l92_16bit_i2c_regmap; 68 regmap_32bit_config = &cs47l92_32bit_i2c_regmap; 69 } 70 break; 71 default: 72 dev_err(&i2c->dev, 73 "Unknown Madera I2C device type %ld\n", type); 74 return -EINVAL; 75 } 76 77 name = madera_name_from_type(type); 78 79 if (!regmap_16bit_config) { 80 /* it's polite to say which codec isn't built into the kernel */ 81 dev_err(&i2c->dev, 82 "Kernel does not include support for %s\n", name); 83 return -EINVAL; 84 } 85 86 madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL); 87 if (!madera) 88 return -ENOMEM; 89 90 madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config); 91 if (IS_ERR(madera->regmap)) { 92 ret = PTR_ERR(madera->regmap); 93 dev_err(&i2c->dev, 94 "Failed to allocate 16-bit register map: %d\n", ret); 95 return ret; 96 } 97 98 madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config); 99 if (IS_ERR(madera->regmap_32bit)) { 100 ret = PTR_ERR(madera->regmap_32bit); 101 dev_err(&i2c->dev, 102 "Failed to allocate 32-bit register map: %d\n", ret); 103 return ret; 104 } 105 106 madera->type = type; 107 madera->type_name = name; 108 madera->dev = &i2c->dev; 109 madera->irq = i2c->irq; 110 111 return madera_dev_init(madera); 112 } 113 114 static void madera_i2c_remove(struct i2c_client *i2c) 115 { 116 struct madera *madera = dev_get_drvdata(&i2c->dev); 117 118 madera_dev_exit(madera); 119 } 120 121 static const struct i2c_device_id madera_i2c_id[] = { 122 { "cs47l15", CS47L15 }, 123 { "cs47l35", CS47L35 }, 124 { "cs47l85", CS47L85 }, 125 { "cs47l90", CS47L90 }, 126 { "cs47l91", CS47L91 }, 127 { "cs42l92", CS42L92 }, 128 { "cs47l92", CS47L92 }, 129 { "cs47l93", CS47L93 }, 130 { "wm1840", WM1840 }, 131 { } 132 }; 133 MODULE_DEVICE_TABLE(i2c, madera_i2c_id); 134 135 static struct i2c_driver madera_i2c_driver = { 136 .driver = { 137 .name = "madera", 138 .pm = &madera_pm_ops, 139 .of_match_table = of_match_ptr(madera_of_match), 140 }, 141 .probe = madera_i2c_probe, 142 .remove = madera_i2c_remove, 143 .id_table = madera_i2c_id, 144 }; 145 146 module_i2c_driver(madera_i2c_driver); 147 148 MODULE_DESCRIPTION("Madera I2C bus interface"); 149 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 150 MODULE_LICENSE("GPL v2"); 151