1d6871a73SCharles Keepax // SPDX-License-Identifier: GPL-2.0-only 216b27467SRichard Fitzgerald /* 316b27467SRichard Fitzgerald * I2C bus interface to Cirrus Logic Madera codecs 416b27467SRichard Fitzgerald * 516b27467SRichard Fitzgerald * Copyright (C) 2015-2018 Cirrus Logic 616b27467SRichard Fitzgerald */ 716b27467SRichard Fitzgerald 816b27467SRichard Fitzgerald #include <linux/device.h> 916b27467SRichard Fitzgerald #include <linux/err.h> 1016b27467SRichard Fitzgerald #include <linux/i2c.h> 1116b27467SRichard Fitzgerald #include <linux/module.h> 1216b27467SRichard Fitzgerald #include <linux/of.h> 1316b27467SRichard Fitzgerald #include <linux/of_device.h> 1416b27467SRichard Fitzgerald #include <linux/regmap.h> 1516b27467SRichard Fitzgerald 1616b27467SRichard Fitzgerald #include <linux/mfd/madera/core.h> 1716b27467SRichard Fitzgerald 1816b27467SRichard Fitzgerald #include "madera.h" 1916b27467SRichard Fitzgerald 20*806b9167SUwe Kleine-König static int madera_i2c_probe(struct i2c_client *i2c) 2116b27467SRichard Fitzgerald { 22*806b9167SUwe Kleine-König const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 2316b27467SRichard Fitzgerald struct madera *madera; 2416b27467SRichard Fitzgerald const struct regmap_config *regmap_16bit_config = NULL; 2516b27467SRichard Fitzgerald const struct regmap_config *regmap_32bit_config = NULL; 2616b27467SRichard Fitzgerald const void *of_data; 2716b27467SRichard Fitzgerald unsigned long type; 2816b27467SRichard Fitzgerald const char *name; 2916b27467SRichard Fitzgerald int ret; 3016b27467SRichard Fitzgerald 3116b27467SRichard Fitzgerald of_data = of_device_get_match_data(&i2c->dev); 3216b27467SRichard Fitzgerald if (of_data) 3316b27467SRichard Fitzgerald type = (unsigned long)of_data; 3416b27467SRichard Fitzgerald else 3516b27467SRichard Fitzgerald type = id->driver_data; 3616b27467SRichard Fitzgerald 3716b27467SRichard Fitzgerald switch (type) { 381ef921b6SRichard Fitzgerald case CS47L15: 391ef921b6SRichard Fitzgerald if (IS_ENABLED(CONFIG_MFD_CS47L15)) { 401ef921b6SRichard Fitzgerald regmap_16bit_config = &cs47l15_16bit_i2c_regmap; 411ef921b6SRichard Fitzgerald regmap_32bit_config = &cs47l15_32bit_i2c_regmap; 421ef921b6SRichard Fitzgerald } 431ef921b6SRichard Fitzgerald break; 4416b27467SRichard Fitzgerald case CS47L35: 4516b27467SRichard Fitzgerald if (IS_ENABLED(CONFIG_MFD_CS47L35)) { 4616b27467SRichard Fitzgerald regmap_16bit_config = &cs47l35_16bit_i2c_regmap; 4716b27467SRichard Fitzgerald regmap_32bit_config = &cs47l35_32bit_i2c_regmap; 4816b27467SRichard Fitzgerald } 4916b27467SRichard Fitzgerald break; 5016b27467SRichard Fitzgerald case CS47L85: 5116b27467SRichard Fitzgerald case WM1840: 5216b27467SRichard Fitzgerald if (IS_ENABLED(CONFIG_MFD_CS47L85)) { 5316b27467SRichard Fitzgerald regmap_16bit_config = &cs47l85_16bit_i2c_regmap; 5416b27467SRichard Fitzgerald regmap_32bit_config = &cs47l85_32bit_i2c_regmap; 5516b27467SRichard Fitzgerald } 5616b27467SRichard Fitzgerald break; 5716b27467SRichard Fitzgerald case CS47L90: 5816b27467SRichard Fitzgerald case CS47L91: 5916b27467SRichard Fitzgerald if (IS_ENABLED(CONFIG_MFD_CS47L90)) { 6016b27467SRichard Fitzgerald regmap_16bit_config = &cs47l90_16bit_i2c_regmap; 6116b27467SRichard Fitzgerald regmap_32bit_config = &cs47l90_32bit_i2c_regmap; 6216b27467SRichard Fitzgerald } 6316b27467SRichard Fitzgerald break; 6429793990SRichard Fitzgerald case CS42L92: 6529793990SRichard Fitzgerald case CS47L92: 6629793990SRichard Fitzgerald case CS47L93: 6729793990SRichard Fitzgerald if (IS_ENABLED(CONFIG_MFD_CS47L92)) { 6829793990SRichard Fitzgerald regmap_16bit_config = &cs47l92_16bit_i2c_regmap; 6929793990SRichard Fitzgerald regmap_32bit_config = &cs47l92_32bit_i2c_regmap; 7029793990SRichard Fitzgerald } 7129793990SRichard Fitzgerald break; 7216b27467SRichard Fitzgerald default: 7316b27467SRichard Fitzgerald dev_err(&i2c->dev, 7416b27467SRichard Fitzgerald "Unknown Madera I2C device type %ld\n", type); 7516b27467SRichard Fitzgerald return -EINVAL; 7616b27467SRichard Fitzgerald } 7716b27467SRichard Fitzgerald 7816b27467SRichard Fitzgerald name = madera_name_from_type(type); 7916b27467SRichard Fitzgerald 8016b27467SRichard Fitzgerald if (!regmap_16bit_config) { 8116b27467SRichard Fitzgerald /* it's polite to say which codec isn't built into the kernel */ 8216b27467SRichard Fitzgerald dev_err(&i2c->dev, 8316b27467SRichard Fitzgerald "Kernel does not include support for %s\n", name); 8416b27467SRichard Fitzgerald return -EINVAL; 8516b27467SRichard Fitzgerald } 8616b27467SRichard Fitzgerald 8716b27467SRichard Fitzgerald madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL); 8816b27467SRichard Fitzgerald if (!madera) 8916b27467SRichard Fitzgerald return -ENOMEM; 9016b27467SRichard Fitzgerald 9116b27467SRichard Fitzgerald madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config); 9216b27467SRichard Fitzgerald if (IS_ERR(madera->regmap)) { 9316b27467SRichard Fitzgerald ret = PTR_ERR(madera->regmap); 9416b27467SRichard Fitzgerald dev_err(&i2c->dev, 9516b27467SRichard Fitzgerald "Failed to allocate 16-bit register map: %d\n", ret); 9616b27467SRichard Fitzgerald return ret; 9716b27467SRichard Fitzgerald } 9816b27467SRichard Fitzgerald 9916b27467SRichard Fitzgerald madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config); 10016b27467SRichard Fitzgerald if (IS_ERR(madera->regmap_32bit)) { 10116b27467SRichard Fitzgerald ret = PTR_ERR(madera->regmap_32bit); 10216b27467SRichard Fitzgerald dev_err(&i2c->dev, 10316b27467SRichard Fitzgerald "Failed to allocate 32-bit register map: %d\n", ret); 10416b27467SRichard Fitzgerald return ret; 10516b27467SRichard Fitzgerald } 10616b27467SRichard Fitzgerald 10716b27467SRichard Fitzgerald madera->type = type; 10816b27467SRichard Fitzgerald madera->type_name = name; 10916b27467SRichard Fitzgerald madera->dev = &i2c->dev; 11016b27467SRichard Fitzgerald madera->irq = i2c->irq; 11116b27467SRichard Fitzgerald 11216b27467SRichard Fitzgerald return madera_dev_init(madera); 11316b27467SRichard Fitzgerald } 11416b27467SRichard Fitzgerald 115ed5c2f5fSUwe Kleine-König static void madera_i2c_remove(struct i2c_client *i2c) 11616b27467SRichard Fitzgerald { 11716b27467SRichard Fitzgerald struct madera *madera = dev_get_drvdata(&i2c->dev); 11816b27467SRichard Fitzgerald 11916b27467SRichard Fitzgerald madera_dev_exit(madera); 12016b27467SRichard Fitzgerald } 12116b27467SRichard Fitzgerald 12216b27467SRichard Fitzgerald static const struct i2c_device_id madera_i2c_id[] = { 1231ef921b6SRichard Fitzgerald { "cs47l15", CS47L15 }, 12416b27467SRichard Fitzgerald { "cs47l35", CS47L35 }, 12516b27467SRichard Fitzgerald { "cs47l85", CS47L85 }, 12616b27467SRichard Fitzgerald { "cs47l90", CS47L90 }, 12716b27467SRichard Fitzgerald { "cs47l91", CS47L91 }, 12829793990SRichard Fitzgerald { "cs42l92", CS42L92 }, 12929793990SRichard Fitzgerald { "cs47l92", CS47L92 }, 13029793990SRichard Fitzgerald { "cs47l93", CS47L93 }, 13116b27467SRichard Fitzgerald { "wm1840", WM1840 }, 13216b27467SRichard Fitzgerald { } 13316b27467SRichard Fitzgerald }; 13416b27467SRichard Fitzgerald MODULE_DEVICE_TABLE(i2c, madera_i2c_id); 13516b27467SRichard Fitzgerald 13616b27467SRichard Fitzgerald static struct i2c_driver madera_i2c_driver = { 13716b27467SRichard Fitzgerald .driver = { 13816b27467SRichard Fitzgerald .name = "madera", 13916b27467SRichard Fitzgerald .pm = &madera_pm_ops, 14016b27467SRichard Fitzgerald .of_match_table = of_match_ptr(madera_of_match), 14116b27467SRichard Fitzgerald }, 142*806b9167SUwe Kleine-König .probe_new = madera_i2c_probe, 14316b27467SRichard Fitzgerald .remove = madera_i2c_remove, 14416b27467SRichard Fitzgerald .id_table = madera_i2c_id, 14516b27467SRichard Fitzgerald }; 14616b27467SRichard Fitzgerald 14716b27467SRichard Fitzgerald module_i2c_driver(madera_i2c_driver); 14816b27467SRichard Fitzgerald 14916b27467SRichard Fitzgerald MODULE_DESCRIPTION("Madera I2C bus interface"); 15016b27467SRichard Fitzgerald MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 15116b27467SRichard Fitzgerald MODULE_LICENSE("GPL v2"); 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