linux/drivers/mfd/da9055-i2c.c
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   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
  19#include <linux/mfd/da9055/core.h>
  20
  21static int __devinit da9055_i2c_probe(struct i2c_client *i2c,
  22                                      const struct i2c_device_id *id)
  23{
  24        struct da9055 *da9055;
  25        int ret;
  26
  27        da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
  28        if (!da9055)
  29                return -ENOMEM;
  30
  31        da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
  32        if (IS_ERR(da9055->regmap)) {
  33                ret = PTR_ERR(da9055->regmap);
  34                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
  35                        ret);
  36                return ret;
  37        }
  38
  39        da9055->dev = &i2c->dev;
  40        da9055->chip_irq = i2c->irq;
  41
  42        i2c_set_clientdata(i2c, da9055);
  43
  44        return da9055_device_init(da9055);
  45}
  46
  47static int __devexit da9055_i2c_remove(struct i2c_client *i2c)
  48{
  49        struct da9055 *da9055 = i2c_get_clientdata(i2c);
  50
  51        da9055_device_exit(da9055);
  52
  53        return 0;
  54}
  55
  56static struct i2c_device_id da9055_i2c_id[] = {
  57        {"da9055-pmic", 0},
  58        { }
  59};
  60
  61static struct i2c_driver da9055_i2c_driver = {
  62        .probe = da9055_i2c_probe,
  63        .remove = __devexit_p(da9055_i2c_remove),
  64        .id_table = da9055_i2c_id,
  65        .driver = {
  66                .name = "da9055",
  67                .owner = THIS_MODULE,
  68        },
  69};
  70
  71static int __init da9055_i2c_init(void)
  72{
  73        int ret;
  74
  75        ret = i2c_add_driver(&da9055_i2c_driver);
  76        if (ret != 0) {
  77                pr_err("DA9055 I2C registration failed %d\n", ret);
  78                return ret;
  79        }
  80
  81        return 0;
  82}
  83subsys_initcall(da9055_i2c_init);
  84
  85static void __exit da9055_i2c_exit(void)
  86{
  87        i2c_del_driver(&da9055_i2c_driver);
  88}
  89module_exit(da9055_i2c_exit);
  90
  91MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
  92MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
  93MODULE_LICENSE("GPL");
  94
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