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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * I2C bus interface to Cirrus Logic Madera codecs4 *5 * Copyright (C) 2015-2018 Cirrus Logic6 */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 19static int madera_i2c_probe(struct i2c_client *i2c)20{21 struct madera *madera;22 const struct regmap_config *regmap_16bit_config = NULL;23 const struct regmap_config *regmap_32bit_config = NULL;24 unsigned long type;25 const char *name;26 int ret;27 28 type = (uintptr_t)i2c_get_match_data(i2c);29 switch (type) {30 case CS47L15:31 if (IS_ENABLED(CONFIG_MFD_CS47L15)) {32 regmap_16bit_config = &cs47l15_16bit_i2c_regmap;33 regmap_32bit_config = &cs47l15_32bit_i2c_regmap;34 }35 break;36 case CS47L35:37 if (IS_ENABLED(CONFIG_MFD_CS47L35)) {38 regmap_16bit_config = &cs47l35_16bit_i2c_regmap;39 regmap_32bit_config = &cs47l35_32bit_i2c_regmap;40 }41 break;42 case CS47L85:43 case WM1840:44 if (IS_ENABLED(CONFIG_MFD_CS47L85)) {45 regmap_16bit_config = &cs47l85_16bit_i2c_regmap;46 regmap_32bit_config = &cs47l85_32bit_i2c_regmap;47 }48 break;49 case CS47L90:50 case CS47L91:51 if (IS_ENABLED(CONFIG_MFD_CS47L90)) {52 regmap_16bit_config = &cs47l90_16bit_i2c_regmap;53 regmap_32bit_config = &cs47l90_32bit_i2c_regmap;54 }55 break;56 case CS42L92:57 case CS47L92:58 case CS47L93:59 if (IS_ENABLED(CONFIG_MFD_CS47L92)) {60 regmap_16bit_config = &cs47l92_16bit_i2c_regmap;61 regmap_32bit_config = &cs47l92_32bit_i2c_regmap;62 }63 break;64 default:65 dev_err(&i2c->dev,66 "Unknown Madera I2C device type %ld\n", type);67 return -EINVAL;68 }69 70 name = madera_name_from_type(type);71 72 if (!regmap_16bit_config) {73 /* it's polite to say which codec isn't built into the kernel */74 dev_err(&i2c->dev,75 "Kernel does not include support for %s\n", name);76 return -EINVAL;77 }78 79 madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);80 if (!madera)81 return -ENOMEM;82 83 madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);84 if (IS_ERR(madera->regmap)) {85 ret = PTR_ERR(madera->regmap);86 dev_err(&i2c->dev,87 "Failed to allocate 16-bit register map: %d\n", ret);88 return ret;89 }90 91 madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);92 if (IS_ERR(madera->regmap_32bit)) {93 ret = PTR_ERR(madera->regmap_32bit);94 dev_err(&i2c->dev,95 "Failed to allocate 32-bit register map: %d\n", ret);96 return ret;97 }98 99 madera->type = type;100 madera->type_name = name;101 madera->dev = &i2c->dev;102 madera->irq = i2c->irq;103 104 return madera_dev_init(madera);105}106 107static void madera_i2c_remove(struct i2c_client *i2c)108{109 struct madera *madera = dev_get_drvdata(&i2c->dev);110 111 madera_dev_exit(madera);112}113 114static const struct i2c_device_id madera_i2c_id[] = {115 { "cs47l15", CS47L15 },116 { "cs47l35", CS47L35 },117 { "cs47l85", CS47L85 },118 { "cs47l90", CS47L90 },119 { "cs47l91", CS47L91 },120 { "cs42l92", CS42L92 },121 { "cs47l92", CS47L92 },122 { "cs47l93", CS47L93 },123 { "wm1840", WM1840 },124 { }125};126MODULE_DEVICE_TABLE(i2c, madera_i2c_id);127 128static struct i2c_driver madera_i2c_driver = {129 .driver = {130 .name = "madera",131 .pm = &madera_pm_ops,132 .of_match_table = of_match_ptr(madera_of_match),133 },134 .probe = madera_i2c_probe,135 .remove = madera_i2c_remove,136 .id_table = madera_i2c_id,137};138 139module_i2c_driver(madera_i2c_driver);140 141MODULE_DESCRIPTION("Madera I2C bus interface");142MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");143MODULE_LICENSE("GPL v2");144