LXR linux/drivers/mfd/mp2629.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * MP2629 parent driver for ADC and battery charger
   4 *
   5 * Copyright 2020 Monolithic Power Systems, Inc
   6 *
   7 * Author: Saravanan Sekar <sravanhome@gmail.com>
   8 */
   9
  10#include <linux/i2c.h>
  11#include <linux/kernel.h>
  12#include <linux/mfd/core.h>
  13#include <linux/mfd/mp2629.h>
  14#include <linux/module.h>
  15#include <linux/platform_device.h>
  16#include <linux/regmap.h>
  17#include <linux/slab.h>
  18
  19static const struct mfd_cell mp2629_cell[] = {
  20        {
  21                .name = "mp2629_adc",
  22                .of_compatible = "mps,mp2629_adc",
  23        },
  24        {
  25                .name = "mp2629_charger",
  26                .of_compatible = "mps,mp2629_charger",
  27        }
  28};
  29
  30static const struct regmap_config mp2629_regmap_config = {
  31        .reg_bits = 8,
  32        .val_bits = 8,
  33        .max_register = 0x17,
  34};
  35
  36static int mp2629_probe(struct i2c_client *client)
  37{
  38        struct mp2629_data *ddata;
  39        int ret;
  40
  41        ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
  42        if (!ddata)
  43                return -ENOMEM;
  44
  45        ddata->dev = &client->dev;
  46        i2c_set_clientdata(client, ddata);
  47
  48        ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
  49        if (IS_ERR(ddata->regmap)) {
  50                dev_err(ddata->dev, "Failed to allocate regmap\n");
  51                return PTR_ERR(ddata->regmap);
  52        }
  53
  54        ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, mp2629_cell,
  55                                   ARRAY_SIZE(mp2629_cell), NULL, 0, NULL);
  56        if (ret)
  57                dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);
  58
  59        return ret;
  60}
  61
  62static const struct of_device_id mp2629_of_match[] = {
  63        { .compatible = "mps,mp2629"},
  64        { }
  65};
  66MODULE_DEVICE_TABLE(of, mp2629_of_match);
  67
  68static struct i2c_driver mp2629_driver = {
  69        .driver = {
  70                .name = "mp2629",
  71                .of_match_table = mp2629_of_match,
  72        },
  73        .probe_new      = mp2629_probe,
  74};
  75module_i2c_driver(mp2629_driver);
  76
  77MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
  78MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
  79MODULE_LICENSE("GPL");
  80