sound/soc/codecs/cs42xx8-i2c.c

   1 /*
   2  * Cirrus Logic CS42448/CS42888 Audio CODEC DAI I2C driver
   3  *
   4  * Copyright (C) 2014 Freescale Semiconductor, Inc.
   5  *
   6  * Author: Nicolin Chen <Guangyu.Chen@freescale.com>
   7  *
   8  * This file is licensed under the terms of the GNU General Public License
   9  * version 2. This program is licensed "as is" without any warranty of any
  10  * kind, whether express or implied.
  11  */
  12
  13 #include <linux/i2c.h>
  14 #include <linux/module.h>
  15 #include <linux/mod_devicetable.h>
  16 #include <linux/pm_runtime.h>
  17 #include <sound/soc.h>
  18
  19 #include "cs42xx8.h"
  20
  21 static int cs42xx8_i2c_probe(struct i2c_client *i2c)
  22 {
  23         int ret;
  24         struct cs42xx8_driver_data *drvdata;
  25
  26         drvdata = (struct cs42xx8_driver_data *)i2c_get_match_data(i2c);
  27         if (!drvdata)
  28                 return dev_err_probe(&i2c->dev, -EINVAL,
  29                                      "failed to find driver data\n");
  30
  31         ret = cs42xx8_probe(&i2c->dev,
  32                 devm_regmap_init_i2c(i2c, &cs42xx8_regmap_config), drvdata);
  33         if (ret)
  34                 return ret;
  35
  36         pm_runtime_enable(&i2c->dev);
  37         pm_request_idle(&i2c->dev);
  38
  39         return 0;
  40 }
  41
  42 static void cs42xx8_i2c_remove(struct i2c_client *i2c)
  43 {
  44         pm_runtime_disable(&i2c->dev);
  45 }
  46
  47 static const struct of_device_id cs42xx8_of_match[] = {
  48         { .compatible = "cirrus,cs42448", .data = &cs42448_data, },
  49         { .compatible = "cirrus,cs42888", .data = &cs42888_data, },
  50         { /* sentinel */ }
  51 };
  52 MODULE_DEVICE_TABLE(of, cs42xx8_of_match);
  53
  54 static const struct i2c_device_id cs42xx8_i2c_id[] = {
  55         {"cs42448", (kernel_ulong_t)&cs42448_data},
  56         {"cs42888", (kernel_ulong_t)&cs42888_data},
  57         {}
  58 };
  59 MODULE_DEVICE_TABLE(i2c, cs42xx8_i2c_id);
  60
  61 static struct i2c_driver cs42xx8_i2c_driver = {
  62         .driver = {
  63                 .name = "cs42xx8",
  64                 .pm = &cs42xx8_pm,
  65                 .of_match_table = cs42xx8_of_match,
  66         },
  67         .probe = cs42xx8_i2c_probe,
  68         .remove = cs42xx8_i2c_remove,
  69         .id_table = cs42xx8_i2c_id,
  70 };
  71
  72 module_i2c_driver(cs42xx8_i2c_driver);
  73
  74 MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec I2C Driver");
  75 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
  76 MODULE_LICENSE("GPL");