// SPDX-License-Identifier: GPL-2.0-only /* * I2C bus interface to Cirrus Logic Madera codecs * * Copyright (C) 2015-2018 Cirrus Logic */ #include <linux/device.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/mfd/madera/core.h> #include "madera.h" static int madera_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { 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(&i2c->dev); if (of_data) type = (unsigned long)of_data; else type = id->driver_data; switch (type) { case CS47L15: if (IS_ENABLED(CONFIG_MFD_CS47L15)) { regmap_16bit_config = &cs47l15_16bit_i2c_regmap; regmap_32bit_config = &cs47l15_32bit_i2c_regmap; } break; case CS47L35: if (IS_ENABLED(CONFIG_MFD_CS47L35)) { regmap_16bit_config = &cs47l35_16bit_i2c_regmap; regmap_32bit_config = &cs47l35_32bit_i2c_regmap; } break; case CS47L85: case WM1840: if (IS_ENABLED(CONFIG_MFD_CS47L85)) { regmap_16bit_config = &cs47l85_16bit_i2c_regmap; regmap_32bit_config = &cs47l85_32bit_i2c_regmap; } break; case CS47L90: case CS47L91: if (IS_ENABLED(CONFIG_MFD_CS47L90)) { regmap_16bit_config = &cs47l90_16bit_i2c_regmap; regmap_32bit_config = &cs47l90_32bit_i2c_regmap; } break; case CS42L92: case CS47L92: case CS47L93: if (IS_ENABLED(CONFIG_MFD_CS47L92)) { regmap_16bit_config = &cs47l92_16bit_i2c_regmap; regmap_32bit_config = &cs47l92_32bit_i2c_regmap; } break; default: dev_err(&i2c->dev, "Unknown Madera I2C 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(&i2c->dev, "Kernel does not include support for %s\n", name); return -EINVAL; } madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL); if (!madera) return -ENOMEM; madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config); if (IS_ERR(madera->regmap)) { ret = PTR_ERR(madera->regmap); dev_err(&i2c->dev, "Failed to allocate 16-bit register map: %d\n", ret); return ret; } madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config); if (IS_ERR(madera->regmap_32bit)) { ret = PTR_ERR(madera->regmap_32bit); dev_err(&i2c->dev, "Failed to allocate 32-bit register map: %d\n", ret); return ret; } madera->type = type; madera->type_name = name; madera->dev = &i2c->dev; madera->irq = i2c->irq; return madera_dev_init(madera); } static int madera_i2c_remove(struct i2c_client *i2c) { struct madera *madera = dev_get_drvdata(&i2c->dev); madera_dev_exit(madera); return 0; } static const struct i2c_device_id madera_i2c_id[] = { { "cs47l15", CS47L15 }, { "cs47l35", CS47L35 }, { "cs47l85", CS47L85 }, { "cs47l90", CS47L90 }, { "cs47l91", CS47L91 }, { "cs42l92", CS42L92 }, { "cs47l92", CS47L92 }, { "cs47l93", CS47L93 }, { "wm1840", WM1840 }, { } }; MODULE_DEVICE_TABLE(i2c, madera_i2c_id); static struct i2c_driver madera_i2c_driver = { .driver = { .name = "madera", .pm = &madera_pm_ops, .of_match_table = of_match_ptr(madera_of_match), }, .probe = madera_i2c_probe, .remove = madera_i2c_remove, .id_table = madera_i2c_id, }; module_i2c_driver(madera_i2c_driver); MODULE_DESCRIPTION("Madera I2C bus interface"); MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); MODULE_LICENSE("GPL v2");