drivers/mfd/act8945a.c

   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.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" },
  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 = act8945a_of_match,
  72         },
  73         .probe = 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");