1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* I2C access for DA9055 PMICs. 3 * 4 * Copyright(c) 2012 Dialog Semiconductor Ltd. 5 * 6 * Author: David Dajun Chen <dchen@diasemi.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/device.h> 11 #include <linux/i2c.h> 12 #include <linux/err.h> 13 #include <linux/of.h> 14 #include <linux/of_device.h> 15 16 #include <linux/mfd/da9055/core.h> 17 18 static int da9055_i2c_probe(struct i2c_client *i2c, 19 const struct i2c_device_id *id) 20 { 21 struct da9055 *da9055; 22 int ret; 23 24 da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL); 25 if (!da9055) 26 return -ENOMEM; 27 28 da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config); 29 if (IS_ERR(da9055->regmap)) { 30 ret = PTR_ERR(da9055->regmap); 31 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 32 ret); 33 return ret; 34 } 35 36 da9055->dev = &i2c->dev; 37 da9055->chip_irq = i2c->irq; 38 39 i2c_set_clientdata(i2c, da9055); 40 41 return da9055_device_init(da9055); 42 } 43 44 static int da9055_i2c_remove(struct i2c_client *i2c) 45 { 46 struct da9055 *da9055 = i2c_get_clientdata(i2c); 47 48 da9055_device_exit(da9055); 49 50 return 0; 51 } 52 53 /* 54 * DO NOT change the device Ids. The naming is intentionally specific as both 55 * the PMIC and CODEC parts of this chip are instantiated separately as I2C 56 * devices (both have configurable I2C addresses, and are to all intents and 57 * purposes separate). As a result there are specific DA9055 ids for PMIC 58 * and CODEC, which must be different to operate together. 59 */ 60 static const struct i2c_device_id da9055_i2c_id[] = { 61 {"da9055-pmic", 0}, 62 { } 63 }; 64 MODULE_DEVICE_TABLE(i2c, da9055_i2c_id); 65 66 static const struct of_device_id da9055_of_match[] = { 67 { .compatible = "dlg,da9055-pmic", }, 68 { } 69 }; 70 71 static struct i2c_driver da9055_i2c_driver = { 72 .probe = da9055_i2c_probe, 73 .remove = da9055_i2c_remove, 74 .id_table = da9055_i2c_id, 75 .driver = { 76 .name = "da9055-pmic", 77 .of_match_table = of_match_ptr(da9055_of_match), 78 }, 79 }; 80 81 static int __init da9055_i2c_init(void) 82 { 83 int ret; 84 85 ret = i2c_add_driver(&da9055_i2c_driver); 86 if (ret != 0) { 87 pr_err("DA9055 I2C registration failed %d\n", ret); 88 return ret; 89 } 90 91 return 0; 92 } 93 subsys_initcall(da9055_i2c_init); 94 95 static void __exit da9055_i2c_exit(void) 96 { 97 i2c_del_driver(&da9055_i2c_driver); 98 } 99 module_exit(da9055_i2c_exit); 100 101 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 102 MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC"); 103 MODULE_LICENSE("GPL"); 104