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 #include <linux/of.h> 19 #include <linux/of_device.h> 20 21 #include <linux/mfd/da9055/core.h> 22 23 static int da9055_i2c_probe(struct i2c_client *i2c, 24 const struct i2c_device_id *id) 25 { 26 struct da9055 *da9055; 27 int ret; 28 29 da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL); 30 if (!da9055) 31 return -ENOMEM; 32 33 da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config); 34 if (IS_ERR(da9055->regmap)) { 35 ret = PTR_ERR(da9055->regmap); 36 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 37 ret); 38 return ret; 39 } 40 41 da9055->dev = &i2c->dev; 42 da9055->chip_irq = i2c->irq; 43 44 i2c_set_clientdata(i2c, da9055); 45 46 return da9055_device_init(da9055); 47 } 48 49 static int da9055_i2c_remove(struct i2c_client *i2c) 50 { 51 struct da9055 *da9055 = i2c_get_clientdata(i2c); 52 53 da9055_device_exit(da9055); 54 55 return 0; 56 } 57 58 /* 59 * DO NOT change the device Ids. The naming is intentionally specific as both 60 * the PMIC and CODEC parts of this chip are instantiated separately as I2C 61 * devices (both have configurable I2C addresses, and are to all intents and 62 * purposes separate). As a result there are specific DA9055 ids for PMIC 63 * and CODEC, which must be different to operate together. 64 */ 65 static const struct i2c_device_id da9055_i2c_id[] = { 66 {"da9055-pmic", 0}, 67 { } 68 }; 69 MODULE_DEVICE_TABLE(i2c, da9055_i2c_id); 70 71 static const struct of_device_id da9055_of_match[] = { 72 { .compatible = "dlg,da9055-pmic", }, 73 { } 74 }; 75 76 static struct i2c_driver da9055_i2c_driver = { 77 .probe = da9055_i2c_probe, 78 .remove = da9055_i2c_remove, 79 .id_table = da9055_i2c_id, 80 .driver = { 81 .name = "da9055-pmic", 82 .of_match_table = of_match_ptr(da9055_of_match), 83 }, 84 }; 85 86 static int __init da9055_i2c_init(void) 87 { 88 int ret; 89 90 ret = i2c_add_driver(&da9055_i2c_driver); 91 if (ret != 0) { 92 pr_err("DA9055 I2C registration failed %d\n", ret); 93 return ret; 94 } 95 96 return 0; 97 } 98 subsys_initcall(da9055_i2c_init); 99 100 static void __exit da9055_i2c_exit(void) 101 { 102 i2c_del_driver(&da9055_i2c_driver); 103 } 104 module_exit(da9055_i2c_exit); 105 106 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 107 MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC"); 108 MODULE_LICENSE("GPL"); 109