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