1 /* 2 * MFD driver for Active-semi ACT8945a PMIC 3 * 4 * Copyright (C) 2015 Atmel Corporation. 5 * 6 * Author: Wenyou Yang <wenyou.yang@atmel.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/i2c.h> 15 #include <linux/mfd/core.h> 16 #include <linux/module.h> 17 #include <linux/of_device.h> 18 #include <linux/regmap.h> 19 20 static const struct mfd_cell act8945a_devs[] = { 21 { 22 .name = "act8945a-regulator", 23 }, 24 { 25 .name = "act8945a-charger", 26 }, 27 }; 28 29 static const struct regmap_config act8945a_regmap_config = { 30 .reg_bits = 8, 31 .val_bits = 8, 32 }; 33 34 static int act8945a_i2c_probe(struct i2c_client *i2c, 35 const struct i2c_device_id *id) 36 { 37 int ret; 38 struct regmap *regmap; 39 40 regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config); 41 if (IS_ERR(regmap)) { 42 ret = PTR_ERR(regmap); 43 dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 44 return ret; 45 } 46 47 i2c_set_clientdata(i2c, regmap); 48 49 ret = mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, act8945a_devs, 50 ARRAY_SIZE(act8945a_devs), NULL, 0, NULL); 51 if (ret) { 52 dev_err(&i2c->dev, "Failed to add sub devices\n"); 53 return ret; 54 } 55 56 return 0; 57 } 58 59 static int act8945a_i2c_remove(struct i2c_client *i2c) 60 { 61 mfd_remove_devices(&i2c->dev); 62 63 return 0; 64 } 65 66 static const struct i2c_device_id act8945a_i2c_id[] = { 67 { "act8945a", 0 }, 68 {} 69 }; 70 MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id); 71 72 static const struct of_device_id act8945a_of_match[] = { 73 { .compatible = "active-semi,act8945a", }, 74 {}, 75 }; 76 MODULE_DEVICE_TABLE(of, act8945a_of_match); 77 78 static struct i2c_driver act8945a_i2c_driver = { 79 .driver = { 80 .name = "act8945a", 81 .of_match_table = of_match_ptr(act8945a_of_match), 82 }, 83 .probe = act8945a_i2c_probe, 84 .remove = act8945a_i2c_remove, 85 .id_table = act8945a_i2c_id, 86 }; 87 88 static int __init act8945a_i2c_init(void) 89 { 90 return i2c_add_driver(&act8945a_i2c_driver); 91 } 92 subsys_initcall(act8945a_i2c_init); 93 94 static void __exit act8945a_i2c_exit(void) 95 { 96 i2c_del_driver(&act8945a_i2c_driver); 97 } 98 module_exit(act8945a_i2c_exit); 99 100 MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver"); 101 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 102 MODULE_LICENSE("GPL"); 103