LXR linux/drivers/mfd/lp87565.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
   4 *
   5 * Author: Keerthy <j-keerthy@ti.com>
   6 */
   7
   8#include <linux/interrupt.h>
   9#include <linux/mfd/core.h>
  10#include <linux/module.h>
  11#include <linux/of_device.h>
  12#include <linux/regmap.h>
  13
  14#include <linux/mfd/lp87565.h>
  15
  16static const struct regmap_config lp87565_regmap_config = {
  17        .reg_bits = 8,
  18        .val_bits = 8,
  19        .max_register = LP87565_REG_MAX,
  20};
  21
  22static const struct mfd_cell lp87565_cells[] = {
  23        { .name = "lp87565-q1-regulator", },
  24        { .name = "lp87565-q1-gpio", },
  25};
  26
  27static const struct of_device_id of_lp87565_match_table[] = {
  28        { .compatible = "ti,lp87565", },
  29        {
  30                .compatible = "ti,lp87565-q1",
  31                .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1,
  32        },
  33        {
  34                .compatible = "ti,lp87561-q1",
  35                .data = (void *)LP87565_DEVICE_TYPE_LP87561_Q1,
  36        },
  37        {}
  38};
  39MODULE_DEVICE_TABLE(of, of_lp87565_match_table);
  40
  41static int lp87565_probe(struct i2c_client *client,
  42                         const struct i2c_device_id *ids)
  43{
  44        struct lp87565 *lp87565;
  45        const struct of_device_id *of_id;
  46        int ret;
  47        unsigned int otpid;
  48
  49        lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);
  50        if (!lp87565)
  51                return -ENOMEM;
  52
  53        lp87565->dev = &client->dev;
  54
  55        lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);
  56        if (IS_ERR(lp87565->regmap)) {
  57                ret = PTR_ERR(lp87565->regmap);
  58                dev_err(lp87565->dev,
  59                        "Failed to initialize register map: %d\n", ret);
  60                return ret;
  61        }
  62
  63        ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);
  64        if (ret) {
  65                dev_err(lp87565->dev, "Failed to read OTP ID\n");
  66                return ret;
  67        }
  68
  69        lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;
  70
  71        of_id = of_match_device(of_lp87565_match_table, &client->dev);
  72        if (of_id)
  73                lp87565->dev_type = (enum lp87565_device_type)of_id->data;
  74
  75        i2c_set_clientdata(client, lp87565);
  76
  77        return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO,
  78                                    lp87565_cells, ARRAY_SIZE(lp87565_cells),
  79                                    NULL, 0, NULL);
  80}
  81
  82static const struct i2c_device_id lp87565_id_table[] = {
  83        { "lp87565-q1", 0 },
  84        { },
  85};
  86MODULE_DEVICE_TABLE(i2c, lp87565_id_table);
  87
  88static struct i2c_driver lp87565_driver = {
  89        .driver = {
  90                .name   = "lp87565",
  91                .of_match_table = of_lp87565_match_table,
  92        },
  93        .probe = lp87565_probe,
  94        .id_table = lp87565_id_table,
  95};
  96module_i2c_driver(lp87565_driver);
  97
  98MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
  99MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");
 100MODULE_LICENSE("GPL v2");
 101