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
  16 static const struct regmap_config lp87565_regmap_config = {
  17         .reg_bits = 8,
  18         .val_bits = 8,
  19         .max_register = LP87565_REG_MAX,
  20 };
  21
  22 static const struct mfd_cell lp87565_cells[] = {
  23         { .name = "lp87565-q1-regulator", },
  24         { .name = "lp87565-q1-gpio", },
  25 };
  26
  27 static 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 };
  35 MODULE_DEVICE_TABLE(of, of_lp87565_match_table);
  36
  37 static int lp87565_probe(struct i2c_client *client,
  38                          const struct i2c_device_id *ids)
  39 {
  40         struct lp87565 *lp87565;
  41         const struct of_device_id *of_id;
  42         int ret;
  43         unsigned int otpid;
  44
  45         lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);
  46         if (!lp87565)
  47                 return -ENOMEM;
  48
  49         lp87565->dev = &client->dev;
  50
  51         lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);
  52         if (IS_ERR(lp87565->regmap)) {
  53                 ret = PTR_ERR(lp87565->regmap);
  54                 dev_err(lp87565->dev,
  55                         "Failed to initialize register map: %d\n", ret);
  56                 return ret;
  57         }
  58
  59         ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);
  60         if (ret) {
  61                 dev_err(lp87565->dev, "Failed to read OTP ID\n");
  62                 return ret;
  63         }
  64
  65         lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;
  66
  67         of_id = of_match_device(of_lp87565_match_table, &client->dev);
  68         if (of_id)
  69                 lp87565->dev_type = (enum lp87565_device_type)of_id->data;
  70
  71         i2c_set_clientdata(client, lp87565);
  72
  73         return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO,
  74                                     lp87565_cells, ARRAY_SIZE(lp87565_cells),
  75                                     NULL, 0, NULL);
  76 }
  77
  78 static const struct i2c_device_id lp87565_id_table[] = {
  79         { "lp87565-q1", 0 },
  80         { },
  81 };
  82 MODULE_DEVICE_TABLE(i2c, lp87565_id_table);
  83
  84 static struct i2c_driver lp87565_driver = {
  85         .driver = {
  86                 .name   = "lp87565",
  87                 .of_match_table = of_lp87565_match_table,
  88         },
  89         .probe = lp87565_probe,
  90         .id_table = lp87565_id_table,
  91 };
  92 module_i2c_driver(lp87565_driver);
  93
  94 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
  95 MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");
  96 MODULE_LICENSE("GPL v2");