sound/soc/codecs/cs42l42-i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * cs42l42-i2c.c -- CS42L42 ALSA SoC audio driver for I2C
   4  *
   5  * Copyright 2016, 2022 Cirrus Logic, Inc.
   6  */
   7
   8 #include <linux/i2c.h>
   9 #include <linux/module.h>
  10 #include <linux/regmap.h>
  11 #include <linux/slab.h>
  12 #include <linux/types.h>
  13
  14 #include "cs42l42.h"
  15
  16 static int cs42l42_i2c_probe(struct i2c_client *i2c_client)
  17 {
  18         struct device *dev = &i2c_client->dev;
  19         struct cs42l42_private *cs42l42;
  20         struct regmap *regmap;
  21         int ret;
  22
  23         cs42l42 = devm_kzalloc(dev, sizeof(*cs42l42), GFP_KERNEL);
  24         if (!cs42l42)
  25                 return -ENOMEM;
  26
  27         regmap = devm_regmap_init_i2c(i2c_client, &cs42l42_regmap);
  28         if (IS_ERR(regmap)) {
  29                 ret = PTR_ERR(regmap);
  30                 dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
  31                 return ret;
  32         }
  33
  34         cs42l42->devid = CS42L42_CHIP_ID;
  35         cs42l42->dev = dev;
  36         cs42l42->regmap = regmap;
  37         cs42l42->irq = i2c_client->irq;
  38
  39         ret = cs42l42_common_probe(cs42l42, &cs42l42_soc_component, &cs42l42_dai);
  40         if (ret)
  41                 return ret;
  42
  43         return cs42l42_init(cs42l42);
  44 }
  45
  46 static int cs42l42_i2c_remove(struct i2c_client *i2c_client)
  47 {
  48         struct cs42l42_private *cs42l42 = dev_get_drvdata(&i2c_client->dev);
  49
  50         cs42l42_common_remove(cs42l42);
  51
  52         return 0;
  53 }
  54
  55 static int __maybe_unused cs42l42_i2c_resume(struct device *dev)
  56 {
  57         int ret;
  58
  59         ret = cs42l42_resume(dev);
  60         if (ret)
  61                 return ret;
  62
  63         cs42l42_resume_restore(dev);
  64
  65         return 0;
  66 }
  67
  68 static const struct dev_pm_ops cs42l42_i2c_pm_ops = {
  69         SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_i2c_resume)
  70 };
  71
  72 static const struct of_device_id __maybe_unused cs42l42_of_match[] = {
  73         { .compatible = "cirrus,cs42l42", },
  74         {}
  75 };
  76 MODULE_DEVICE_TABLE(of, cs42l42_of_match);
  77
  78 static const struct acpi_device_id __maybe_unused cs42l42_acpi_match[] = {
  79         {"10134242", 0,},
  80         {}
  81 };
  82 MODULE_DEVICE_TABLE(acpi, cs42l42_acpi_match);
  83
  84 static const struct i2c_device_id cs42l42_id[] = {
  85         {"cs42l42", 0},
  86         {}
  87 };
  88
  89 MODULE_DEVICE_TABLE(i2c, cs42l42_id);
  90
  91 static struct i2c_driver cs42l42_i2c_driver = {
  92         .driver = {
  93                 .name = "cs42l42",
  94                 .pm = &cs42l42_i2c_pm_ops,
  95                 .of_match_table = of_match_ptr(cs42l42_of_match),
  96                 .acpi_match_table = ACPI_PTR(cs42l42_acpi_match),
  97                 },
  98         .id_table = cs42l42_id,
  99         .probe_new = cs42l42_i2c_probe,
 100         .remove = cs42l42_i2c_remove,
 101 };
 102
 103 module_i2c_driver(cs42l42_i2c_driver);
 104
 105 MODULE_DESCRIPTION("ASoC CS42L42 I2C driver");
 106 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
 107 MODULE_LICENSE("GPL");
 108 MODULE_IMPORT_NS(SND_SOC_CS42L42_CORE);