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 = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, 50 act8945a_devs, ARRAY_SIZE(act8945a_devs), 51 NULL, 0, NULL); 52 if (ret) { 53 dev_err(&i2c->dev, "Failed to add sub devices\n"); 54 return ret; 55 } 56 57 return 0; 58 } 59 60 static const struct i2c_device_id act8945a_i2c_id[] = { 61 { "act8945a", 0 }, 62 {} 63 }; 64 MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id); 65 66 static const struct of_device_id act8945a_of_match[] = { 67 { .compatible = "active-semi,act8945a", }, 68 {}, 69 }; 70 MODULE_DEVICE_TABLE(of, act8945a_of_match); 71 72 static struct i2c_driver act8945a_i2c_driver = { 73 .driver = { 74 .name = "act8945a", 75 .of_match_table = of_match_ptr(act8945a_of_match), 76 }, 77 .probe = act8945a_i2c_probe, 78 .id_table = act8945a_i2c_id, 79 }; 80 81 static int __init act8945a_i2c_init(void) 82 { 83 return i2c_add_driver(&act8945a_i2c_driver); 84 } 85 subsys_initcall(act8945a_i2c_init); 86 87 static void __exit act8945a_i2c_exit(void) 88 { 89 i2c_del_driver(&act8945a_i2c_driver); 90 } 91 module_exit(act8945a_i2c_exit); 92 93 MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver"); 94 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 95 MODULE_LICENSE("GPL"); 96