LXR linux/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_device.h>
  14#include <linux/regmap.h>
  15
  16static 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
  26static const struct regmap_config act8945a_regmap_config = {
  27        .reg_bits = 8,
  28        .val_bits = 8,
  29};
  30
  31static 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
  57static const struct i2c_device_id act8945a_i2c_id[] = {
  58        { "act8945a", 0 },
  59        {}
  60};
  61MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
  62
  63static const struct of_device_id act8945a_of_match[] = {
  64        { .compatible = "active-semi,act8945a", },
  65        {},
  66};
  67MODULE_DEVICE_TABLE(of, act8945a_of_match);
  68
  69static 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
  78static int __init act8945a_i2c_init(void)
  79{
  80        return i2c_add_driver(&act8945a_i2c_driver);
  81}
  82subsys_initcall(act8945a_i2c_init);
  83
  84static void __exit act8945a_i2c_exit(void)
  85{
  86        i2c_del_driver(&act8945a_i2c_driver);
  87}
  88module_exit(act8945a_i2c_exit);
  89
  90MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
  91MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
  92MODULE_LICENSE("GPL");
  93