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                 return dev_err_probe(&i2c_client->dev, PTR_ERR(regmap),
  30                                      "regmap_init() failed\n");
  31
  32         cs42l42->devid = CS42L42_CHIP_ID;
  33         cs42l42->dev = dev;
  34         cs42l42->regmap = regmap;
  35         cs42l42->irq = i2c_client->irq;
  36
  37         ret = cs42l42_common_probe(cs42l42, &cs42l42_soc_component, &cs42l42_dai);
  38         if (ret)
  39                 return ret;
  40
  41         return cs42l42_init(cs42l42);
  42 }
  43
  44 static void cs42l42_i2c_remove(struct i2c_client *i2c_client)
  45 {
  46         struct cs42l42_private *cs42l42 = dev_get_drvdata(&i2c_client->dev);
  47
  48         cs42l42_common_remove(cs42l42);
  49 }
  50
  51 static int __maybe_unused cs42l42_i2c_resume(struct device *dev)
  52 {
  53         int ret;
  54
  55         ret = cs42l42_resume(dev);
  56         if (ret)
  57                 return ret;
  58
  59         cs42l42_resume_restore(dev);
  60
  61         return 0;
  62 }
  63
  64 static const struct dev_pm_ops cs42l42_i2c_pm_ops = {
  65         SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_i2c_resume)
  66 };
  67
  68 static const struct of_device_id __maybe_unused cs42l42_of_match[] = {
  69         { .compatible = "cirrus,cs42l42", },
  70         {}
  71 };
  72 MODULE_DEVICE_TABLE(of, cs42l42_of_match);
  73
  74 static const struct acpi_device_id __maybe_unused cs42l42_acpi_match[] = {
  75         {"10134242", 0,},
  76         {}
  77 };
  78 MODULE_DEVICE_TABLE(acpi, cs42l42_acpi_match);
  79
  80 static const struct i2c_device_id cs42l42_id[] = {
  81         {"cs42l42", 0},
  82         {}
  83 };
  84
  85 MODULE_DEVICE_TABLE(i2c, cs42l42_id);
  86
  87 static struct i2c_driver cs42l42_i2c_driver = {
  88         .driver = {
  89                 .name = "cs42l42",
  90                 .pm = &cs42l42_i2c_pm_ops,
  91                 .of_match_table = of_match_ptr(cs42l42_of_match),
  92                 .acpi_match_table = ACPI_PTR(cs42l42_acpi_match),
  93                 },
  94         .id_table = cs42l42_id,
  95         .probe_new = cs42l42_i2c_probe,
  96         .remove = cs42l42_i2c_remove,
  97 };
  98
  99 module_i2c_driver(cs42l42_i2c_driver);
 100
 101 MODULE_DESCRIPTION("ASoC CS42L42 I2C driver");
 102 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
 103 MODULE_LICENSE("GPL");
 104 MODULE_IMPORT_NS(SND_SOC_CS42L42_CORE);