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->dev = dev;
  35         cs42l42->regmap = regmap;
  36         cs42l42->irq = i2c_client->irq;
  37
  38         ret = cs42l42_common_probe(cs42l42, &cs42l42_soc_component, &cs42l42_dai);
  39         if (ret)
  40                 return ret;
  41
  42         return cs42l42_init(cs42l42);
  43 }
  44
  45 static int cs42l42_i2c_remove(struct i2c_client *i2c_client)
  46 {
  47         struct cs42l42_private *cs42l42 = dev_get_drvdata(&i2c_client->dev);
  48
  49         cs42l42_common_remove(cs42l42);
  50
  51         return 0;
  52 }
  53
  54 static int __maybe_unused cs42l42_i2c_resume(struct device *dev)
  55 {
  56         int ret;
  57
  58         ret = cs42l42_resume(dev);
  59         if (ret)
  60                 return ret;
  61
  62         cs42l42_resume_restore(dev);
  63
  64         return 0;
  65 }
  66
  67 static const struct dev_pm_ops cs42l42_i2c_pm_ops = {
  68         SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_i2c_resume)
  69 };
  70
  71 static const struct of_device_id __maybe_unused cs42l42_of_match[] = {
  72         { .compatible = "cirrus,cs42l42", },
  73         {}
  74 };
  75 MODULE_DEVICE_TABLE(of, cs42l42_of_match);
  76
  77 static const struct acpi_device_id __maybe_unused cs42l42_acpi_match[] = {
  78         {"10134242", 0,},
  79         {}
  80 };
  81 MODULE_DEVICE_TABLE(acpi, cs42l42_acpi_match);
  82
  83 static const struct i2c_device_id cs42l42_id[] = {
  84         {"cs42l42", 0},
  85         {}
  86 };
  87
  88 MODULE_DEVICE_TABLE(i2c, cs42l42_id);
  89
  90 static struct i2c_driver cs42l42_i2c_driver = {
  91         .driver = {
  92                 .name = "cs42l42",
  93                 .pm = &cs42l42_i2c_pm_ops,
  94                 .of_match_table = of_match_ptr(cs42l42_of_match),
  95                 .acpi_match_table = ACPI_PTR(cs42l42_acpi_match),
  96                 },
  97         .id_table = cs42l42_id,
  98         .probe_new = cs42l42_i2c_probe,
  99         .remove = cs42l42_i2c_remove,
 100 };
 101
 102 module_i2c_driver(cs42l42_i2c_driver);
 103
 104 MODULE_DESCRIPTION("ASoC CS42L42 I2C driver");
 105 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
 106 MODULE_LICENSE("GPL");
 107 MODULE_IMPORT_NS(SND_SOC_CS42L42_CORE);