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