LXR linux/drivers/mfd/da9055-i2c.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2 /* I2C access for DA9055 PMICs.
   3 *
   4 * Copyright(c) 2012 Dialog Semiconductor Ltd.
   5 *
   6 * Author: David Dajun Chen <dchen@diasemi.com>
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/device.h>
  11#include <linux/i2c.h>
  12#include <linux/err.h>
  13#include <linux/of.h>
  14#include <linux/of_device.h>
  15
  16#include <linux/mfd/da9055/core.h>
  17
  18static int da9055_i2c_probe(struct i2c_client *i2c,
  19                                      const struct i2c_device_id *id)
  20{
  21        struct da9055 *da9055;
  22        int ret;
  23
  24        da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
  25        if (!da9055)
  26                return -ENOMEM;
  27
  28        da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
  29        if (IS_ERR(da9055->regmap)) {
  30                ret = PTR_ERR(da9055->regmap);
  31                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  32                        ret);
  33                return ret;
  34        }
  35
  36        da9055->dev = &i2c->dev;
  37        da9055->chip_irq = i2c->irq;
  38
  39        i2c_set_clientdata(i2c, da9055);
  40
  41        return da9055_device_init(da9055);
  42}
  43
  44static int da9055_i2c_remove(struct i2c_client *i2c)
  45{
  46        struct da9055 *da9055 = i2c_get_clientdata(i2c);
  47
  48        da9055_device_exit(da9055);
  49
  50        return 0;
  51}
  52
  53/*
  54 * DO NOT change the device Ids. The naming is intentionally specific as both
  55 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
  56 * devices (both have configurable I2C addresses, and are to all intents and
  57 * purposes separate). As a result there are specific DA9055 ids for PMIC
  58 * and CODEC, which must be different to operate together.
  59 */
  60static const struct i2c_device_id da9055_i2c_id[] = {
  61        {"da9055-pmic", 0},
  62        { }
  63};
  64MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
  65
  66static const struct of_device_id da9055_of_match[] = {
  67        { .compatible = "dlg,da9055-pmic", },
  68        { }
  69};
  70
  71static struct i2c_driver da9055_i2c_driver = {
  72        .probe = da9055_i2c_probe,
  73        .remove = da9055_i2c_remove,
  74        .id_table = da9055_i2c_id,
  75        .driver = {
  76                .name = "da9055-pmic",
  77                .of_match_table = of_match_ptr(da9055_of_match),
  78        },
  79};
  80
  81static int __init da9055_i2c_init(void)
  82{
  83        int ret;
  84
  85        ret = i2c_add_driver(&da9055_i2c_driver);
  86        if (ret != 0) {
  87                pr_err("DA9055 I2C registration failed %d\n", ret);
  88                return ret;
  89        }
  90
  91        return 0;
  92}
  93subsys_initcall(da9055_i2c_init);
  94
  95static void __exit da9055_i2c_exit(void)
  96{
  97        i2c_del_driver(&da9055_i2c_driver);
  98}
  99module_exit(da9055_i2c_exit);
 100
 101MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 102MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
 103MODULE_LICENSE("GPL");
 104