drivers/mfd/act8945a.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * MFD driver for Active-semi ACT8945a PMIC
0004  *
0005  * Copyright (C) 2015 Atmel Corporation.
0006  *
0007  * Author: Wenyou Yang <wenyou.yang@atmel.com>
0008  */
0009
0010 #include <linux/i2c.h>
0011 #include <linux/mfd/core.h>
0012 #include <linux/module.h>
0013 #include <linux/of_device.h>
0014 #include <linux/regmap.h>
0015
0016 static const struct mfd_cell act8945a_devs[] = {
0017     {
0018         .name = "act8945a-regulator",
0019     },
0020     {
0021         .name = "act8945a-charger",
0022         .of_compatible = "active-semi,act8945a-charger",
0023     },
0024 };
0025
0026 static const struct regmap_config act8945a_regmap_config = {
0027     .reg_bits = 8,
0028     .val_bits = 8,
0029 };
0030
0031 static int act8945a_i2c_probe(struct i2c_client *i2c,
0032                   const struct i2c_device_id *id)
0033 {
0034     int ret;
0035     struct regmap *regmap;
0036
0037     regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
0038     if (IS_ERR(regmap)) {
0039         ret = PTR_ERR(regmap);
0040         dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
0041         return ret;
0042     }
0043
0044     i2c_set_clientdata(i2c, regmap);
0045
0046     ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
0047                    act8945a_devs, ARRAY_SIZE(act8945a_devs),
0048                    NULL, 0, NULL);
0049     if (ret) {
0050         dev_err(&i2c->dev, "Failed to add sub devices\n");
0051         return ret;
0052     }
0053
0054     return 0;
0055 }
0056
0057 static const struct i2c_device_id act8945a_i2c_id[] = {
0058     { "act8945a", 0 },
0059     {}
0060 };
0061 MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
0062
0063 static const struct of_device_id act8945a_of_match[] = {
0064     { .compatible = "active-semi,act8945a", },
0065     {},
0066 };
0067 MODULE_DEVICE_TABLE(of, act8945a_of_match);
0068
0069 static struct i2c_driver act8945a_i2c_driver = {
0070     .driver = {
0071            .name = "act8945a",
0072            .of_match_table = of_match_ptr(act8945a_of_match),
0073     },
0074     .probe = act8945a_i2c_probe,
0075     .id_table = act8945a_i2c_id,
0076 };
0077
0078 static int __init act8945a_i2c_init(void)
0079 {
0080     return i2c_add_driver(&act8945a_i2c_driver);
0081 }
0082 subsys_initcall(act8945a_i2c_init);
0083
0084 static void __exit act8945a_i2c_exit(void)
0085 {
0086     i2c_del_driver(&act8945a_i2c_driver);
0087 }
0088 module_exit(act8945a_i2c_exit);
0089
0090 MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
0091 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
0092 MODULE_LICENSE("GPL");