1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * MFD driver for Active-semi ACT8945a PMIC 4 * 5 * Copyright (C) 2015 Atmel Corporation. 6 * 7 * Author: Wenyou Yang <wenyou.yang@atmel.com> 8 */ 9 10 #include <linux/i2c.h> 11 #include <linux/mfd/core.h> 12 #include <linux/module.h> 13 #include <linux/of_device.h> 14 #include <linux/regmap.h> 15 16 static const struct mfd_cell act8945a_devs[] = { 17 { 18 .name = "act8945a-regulator", 19 }, 20 { 21 .name = "act8945a-charger", 22 .of_compatible = "active-semi,act8945a-charger", 23 }, 24 }; 25 26 static const struct regmap_config act8945a_regmap_config = { 27 .reg_bits = 8, 28 .val_bits = 8, 29 }; 30 31 static int act8945a_i2c_probe(struct i2c_client *i2c) 32 { 33 int ret; 34 struct regmap *regmap; 35 36 regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config); 37 if (IS_ERR(regmap)) { 38 ret = PTR_ERR(regmap); 39 dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 40 return ret; 41 } 42 43 i2c_set_clientdata(i2c, regmap); 44 45 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, 46 act8945a_devs, ARRAY_SIZE(act8945a_devs), 47 NULL, 0, NULL); 48 if (ret) { 49 dev_err(&i2c->dev, "Failed to add sub devices\n"); 50 return ret; 51 } 52 53 return 0; 54 } 55 56 static const struct i2c_device_id act8945a_i2c_id[] = { 57 { "act8945a", 0 }, 58 {} 59 }; 60 MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id); 61 62 static const struct of_device_id act8945a_of_match[] = { 63 { .compatible = "active-semi,act8945a", }, 64 {}, 65 }; 66 MODULE_DEVICE_TABLE(of, act8945a_of_match); 67 68 static struct i2c_driver act8945a_i2c_driver = { 69 .driver = { 70 .name = "act8945a", 71 .of_match_table = of_match_ptr(act8945a_of_match), 72 }, 73 .probe_new = act8945a_i2c_probe, 74 .id_table = act8945a_i2c_id, 75 }; 76 77 static int __init act8945a_i2c_init(void) 78 { 79 return i2c_add_driver(&act8945a_i2c_driver); 80 } 81 subsys_initcall(act8945a_i2c_init); 82 83 static void __exit act8945a_i2c_exit(void) 84 { 85 i2c_del_driver(&act8945a_i2c_driver); 86 } 87 module_exit(act8945a_i2c_exit); 88 89 MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver"); 90 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 91 MODULE_LICENSE("GPL"); 92