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

   1 /* I2C access for DA9055 PMICs.
   2 *
   3 * Copyright(c) 2012 Dialog Semiconductor Ltd.
   4 *
   5 * Author: David Dajun Chen <dchen@diasemi.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/device.h>
  16#include <linux/i2c.h>
  17#include <linux/err.h>
  18#include <linux/of.h>
  19#include <linux/of_device.h>
  20
  21#include <linux/mfd/da9055/core.h>
  22
  23static int da9055_i2c_probe(struct i2c_client *i2c,
  24                                      const struct i2c_device_id *id)
  25{
  26        struct da9055 *da9055;
  27        int ret;
  28
  29        da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
  30        if (!da9055)
  31                return -ENOMEM;
  32
  33        da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
  34        if (IS_ERR(da9055->regmap)) {
  35                ret = PTR_ERR(da9055->regmap);
  36                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  37                        ret);
  38                return ret;
  39        }
  40
  41        da9055->dev = &i2c->dev;
  42        da9055->chip_irq = i2c->irq;
  43
  44        i2c_set_clientdata(i2c, da9055);
  45
  46        return da9055_device_init(da9055);
  47}
  48
  49static int da9055_i2c_remove(struct i2c_client *i2c)
  50{
  51        struct da9055 *da9055 = i2c_get_clientdata(i2c);
  52
  53        da9055_device_exit(da9055);
  54
  55        return 0;
  56}
  57
  58/*
  59 * DO NOT change the device Ids. The naming is intentionally specific as both
  60 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
  61 * devices (both have configurable I2C addresses, and are to all intents and
  62 * purposes separate). As a result there are specific DA9055 ids for PMIC
  63 * and CODEC, which must be different to operate together.
  64 */
  65static struct i2c_device_id da9055_i2c_id[] = {
  66        {"da9055-pmic", 0},
  67        { }
  68};
  69MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
  70
  71static const struct of_device_id da9055_of_match[] = {
  72        { .compatible = "dlg,da9055-pmic", },
  73        { }
  74};
  75
  76static struct i2c_driver da9055_i2c_driver = {
  77        .probe = da9055_i2c_probe,
  78        .remove = da9055_i2c_remove,
  79        .id_table = da9055_i2c_id,
  80        .driver = {
  81                .name = "da9055-pmic",
  82                .owner = THIS_MODULE,
  83                .of_match_table = of_match_ptr(da9055_of_match),
  84        },
  85};
  86
  87static int __init da9055_i2c_init(void)
  88{
  89        int ret;
  90
  91        ret = i2c_add_driver(&da9055_i2c_driver);
  92        if (ret != 0) {
  93                pr_err("DA9055 I2C registration failed %d\n", ret);
  94                return ret;
  95        }
  96
  97        return 0;
  98}
  99subsys_initcall(da9055_i2c_init);
 100
 101static void __exit da9055_i2c_exit(void)
 102{
 103        i2c_del_driver(&da9055_i2c_driver);
 104}
 105module_exit(da9055_i2c_exit);
 106
 107MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 108MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
 109MODULE_LICENSE("GPL");
 110