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 const struct i2c_device_id *id) 33 { 34 int ret; 35 struct regmap *regmap; 36 37 regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config); 38 if (IS_ERR(regmap)) { 39 ret = PTR_ERR(regmap); 40 dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 41 return ret; 42 } 43 44 i2c_set_clientdata(i2c, regmap); 45 46 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE, 47 act8945a_devs, ARRAY_SIZE(act8945a_devs), 48 NULL, 0, NULL); 49 if (ret) { 50 dev_err(&i2c->dev, "Failed to add sub devices\n"); 51 return ret; 52 } 53 54 return 0; 55 } 56 57 static const struct i2c_device_id act8945a_i2c_id[] = { 58 { "act8945a", 0 }, 59 {} 60 }; 61 MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id); 62 63 static const struct of_device_id act8945a_of_match[] = { 64 { .compatible = "active-semi,act8945a", }, 65 {}, 66 }; 67 MODULE_DEVICE_TABLE(of, act8945a_of_match); 68 69 static struct i2c_driver act8945a_i2c_driver = { 70 .driver = { 71 .name = "act8945a", 72 .of_match_table = of_match_ptr(act8945a_of_match), 73 }, 74 .probe = act8945a_i2c_probe, 75 .id_table = act8945a_i2c_id, 76 }; 77 78 static int __init act8945a_i2c_init(void) 79 { 80 return i2c_add_driver(&act8945a_i2c_driver); 81 } 82 subsys_initcall(act8945a_i2c_init); 83 84 static void __exit act8945a_i2c_exit(void) 85 { 86 i2c_del_driver(&act8945a_i2c_driver); 87 } 88 module_exit(act8945a_i2c_exit); 89 90 MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver"); 91 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 92 MODULE_LICENSE("GPL"); 93