1 /* I2C access for DA9055 PMICs. 2 * 3 * Copyright(c) 2012 Dialog Semiconductor Ltd. 4 * 5 * Author: David Dajun Chen <dchen@diasemi.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/device.h> 16 #include <linux/i2c.h> 17 #include <linux/err.h> 18 19 #include <linux/mfd/da9055/core.h> 20 21 static int da9055_i2c_probe(struct i2c_client *i2c, 22 const struct i2c_device_id *id) 23 { 24 struct da9055 *da9055; 25 int ret; 26 27 da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL); 28 if (!da9055) 29 return -ENOMEM; 30 31 da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config); 32 if (IS_ERR(da9055->regmap)) { 33 ret = PTR_ERR(da9055->regmap); 34 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 35 ret); 36 return ret; 37 } 38 39 da9055->dev = &i2c->dev; 40 da9055->chip_irq = i2c->irq; 41 42 i2c_set_clientdata(i2c, da9055); 43 44 return da9055_device_init(da9055); 45 } 46 47 static int da9055_i2c_remove(struct i2c_client *i2c) 48 { 49 struct da9055 *da9055 = i2c_get_clientdata(i2c); 50 51 da9055_device_exit(da9055); 52 53 return 0; 54 } 55 56 /* 57 * DO NOT change the device Ids. The naming is intentionally specific as both 58 * the PMIC and CODEC parts of this chip are instantiated separately as I2C 59 * devices (both have configurable I2C addresses, and are to all intents and 60 * purposes separate). As a result there are specific DA9055 ids for PMIC 61 * and CODEC, which must be different to operate together. 62 */ 63 static struct i2c_device_id da9055_i2c_id[] = { 64 {"da9055-pmic", 0}, 65 { } 66 }; 67 MODULE_DEVICE_TABLE(i2c, da9055_i2c_id); 68 69 static struct i2c_driver da9055_i2c_driver = { 70 .probe = da9055_i2c_probe, 71 .remove = da9055_i2c_remove, 72 .id_table = da9055_i2c_id, 73 .driver = { 74 .name = "da9055-pmic", 75 .owner = THIS_MODULE, 76 }, 77 }; 78 79 static int __init da9055_i2c_init(void) 80 { 81 int ret; 82 83 ret = i2c_add_driver(&da9055_i2c_driver); 84 if (ret != 0) { 85 pr_err("DA9055 I2C registration failed %d\n", ret); 86 return ret; 87 } 88 89 return 0; 90 } 91 subsys_initcall(da9055_i2c_init); 92 93 static void __exit da9055_i2c_exit(void) 94 { 95 i2c_del_driver(&da9055_i2c_driver); 96 } 97 module_exit(da9055_i2c_exit); 98 99 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 100 MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC"); 101 MODULE_LICENSE("GPL"); 102