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1// SPDX-License-Identifier: GPL-2.0+2/*3 * MP2629 parent driver for ADC and battery charger4 *5 * Copyright 2020 Monolithic Power Systems, Inc6 *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 = 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