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/of_device.h> 14 #include <linux/regmap.h> 15 16 #include <linux/mfd/madera/core.h> 17 18 #include "madera.h" 19 20 static int madera_i2c_probe(struct i2c_client *i2c) 21 { 22 const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 23 struct madera *madera; 24 const struct regmap_config *regmap_16bit_config = NULL; 25 const struct regmap_config *regmap_32bit_config = NULL; 26 const void *of_data; 27 unsigned long type; 28 const char *name; 29 int ret; 30 31 of_data = of_device_get_match_data(&i2c->dev); 32 if (of_data) 33 type = (unsigned long)of_data; 34 else 35 type = id->driver_data; 36 37 switch (type) { 38 case CS47L15: 39 if (IS_ENABLED(CONFIG_MFD_CS47L15)) { 40 regmap_16bit_config = &cs47l15_16bit_i2c_regmap; 41 regmap_32bit_config = &cs47l15_32bit_i2c_regmap; 42 } 43 break; 44 case CS47L35: 45 if (IS_ENABLED(CONFIG_MFD_CS47L35)) { 46 regmap_16bit_config = &cs47l35_16bit_i2c_regmap; 47 regmap_32bit_config = &cs47l35_32bit_i2c_regmap; 48 } 49 break; 50 case CS47L85: 51 case WM1840: 52 if (IS_ENABLED(CONFIG_MFD_CS47L85)) { 53 regmap_16bit_config = &cs47l85_16bit_i2c_regmap; 54 regmap_32bit_config = &cs47l85_32bit_i2c_regmap; 55 } 56 break; 57 case CS47L90: 58 case CS47L91: 59 if (IS_ENABLED(CONFIG_MFD_CS47L90)) { 60 regmap_16bit_config = &cs47l90_16bit_i2c_regmap; 61 regmap_32bit_config = &cs47l90_32bit_i2c_regmap; 62 } 63 break; 64 case CS42L92: 65 case CS47L92: 66 case CS47L93: 67 if (IS_ENABLED(CONFIG_MFD_CS47L92)) { 68 regmap_16bit_config = &cs47l92_16bit_i2c_regmap; 69 regmap_32bit_config = &cs47l92_32bit_i2c_regmap; 70 } 71 break; 72 default: 73 dev_err(&i2c->dev, 74 "Unknown Madera I2C device type %ld\n", type); 75 return -EINVAL; 76 } 77 78 name = madera_name_from_type(type); 79 80 if (!regmap_16bit_config) { 81 /* it's polite to say which codec isn't built into the kernel */ 82 dev_err(&i2c->dev, 83 "Kernel does not include support for %s\n", name); 84 return -EINVAL; 85 } 86 87 madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL); 88 if (!madera) 89 return -ENOMEM; 90 91 madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config); 92 if (IS_ERR(madera->regmap)) { 93 ret = PTR_ERR(madera->regmap); 94 dev_err(&i2c->dev, 95 "Failed to allocate 16-bit register map: %d\n", ret); 96 return ret; 97 } 98 99 madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config); 100 if (IS_ERR(madera->regmap_32bit)) { 101 ret = PTR_ERR(madera->regmap_32bit); 102 dev_err(&i2c->dev, 103 "Failed to allocate 32-bit register map: %d\n", ret); 104 return ret; 105 } 106 107 madera->type = type; 108 madera->type_name = name; 109 madera->dev = &i2c->dev; 110 madera->irq = i2c->irq; 111 112 return madera_dev_init(madera); 113 } 114 115 static void madera_i2c_remove(struct i2c_client *i2c) 116 { 117 struct madera *madera = dev_get_drvdata(&i2c->dev); 118 119 madera_dev_exit(madera); 120 } 121 122 static const struct i2c_device_id madera_i2c_id[] = { 123 { "cs47l15", CS47L15 }, 124 { "cs47l35", CS47L35 }, 125 { "cs47l85", CS47L85 }, 126 { "cs47l90", CS47L90 }, 127 { "cs47l91", CS47L91 }, 128 { "cs42l92", CS42L92 }, 129 { "cs47l92", CS47L92 }, 130 { "cs47l93", CS47L93 }, 131 { "wm1840", WM1840 }, 132 { } 133 }; 134 MODULE_DEVICE_TABLE(i2c, madera_i2c_id); 135 136 static struct i2c_driver madera_i2c_driver = { 137 .driver = { 138 .name = "madera", 139 .pm = &madera_pm_ops, 140 .of_match_table = of_match_ptr(madera_of_match), 141 }, 142 .probe = madera_i2c_probe, 143 .remove = madera_i2c_remove, 144 .id_table = madera_i2c_id, 145 }; 146 147 module_i2c_driver(madera_i2c_driver); 148 149 MODULE_DESCRIPTION("Madera I2C bus interface"); 150 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 151 MODULE_LICENSE("GPL v2"); 152