LXR linux/sound/soc/codecs/cs35l41-i2c.c

   1// SPDX-License-Identifier: GPL-2.0
   2//
   3// cs35l41-i2c.c -- CS35l41 I2C driver
   4//
   5// Copyright 2017-2021 Cirrus Logic, Inc.
   6//
   7// Author: David Rhodes <david.rhodes@cirrus.com>
   8
   9#include <linux/acpi.h>
  10#include <linux/delay.h>
  11#include <linux/i2c.h>
  12#include <linux/init.h>
  13#include <linux/kernel.h>
  14#include <linux/module.h>
  15#include <linux/moduleparam.h>
  16#include <linux/of_device.h>
  17#include <linux/platform_device.h>
  18#include <linux/slab.h>
  19
  20#include <sound/cs35l41.h>
  21#include "cs35l41.h"
  22
  23static struct regmap_config cs35l41_regmap_i2c = {
  24        .reg_bits = 32,
  25        .val_bits = 32,
  26        .reg_stride = CS35L41_REGSTRIDE,
  27        .reg_format_endian = REGMAP_ENDIAN_BIG,
  28        .val_format_endian = REGMAP_ENDIAN_BIG,
  29        .max_register = CS35L41_LASTREG,
  30        .reg_defaults = cs35l41_reg,
  31        .num_reg_defaults = ARRAY_SIZE(cs35l41_reg),
  32        .volatile_reg = cs35l41_volatile_reg,
  33        .readable_reg = cs35l41_readable_reg,
  34        .precious_reg = cs35l41_precious_reg,
  35        .cache_type = REGCACHE_RBTREE,
  36};
  37
  38static const struct i2c_device_id cs35l41_id_i2c[] = {
  39        { "cs35l40", 0 },
  40        { "cs35l41", 0 },
  41        {}
  42};
  43
  44MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
  45
  46static int cs35l41_i2c_probe(struct i2c_client *client,
  47                             const struct i2c_device_id *id)
  48{
  49        struct cs35l41_private *cs35l41;
  50        struct device *dev = &client->dev;
  51        struct cs35l41_platform_data *pdata = dev_get_platdata(dev);
  52        const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
  53        int ret;
  54
  55        cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
  56
  57        if (!cs35l41)
  58                return -ENOMEM;
  59
  60        cs35l41->dev = dev;
  61        cs35l41->irq = client->irq;
  62
  63        i2c_set_clientdata(client, cs35l41);
  64        cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
  65        if (IS_ERR(cs35l41->regmap)) {
  66                ret = PTR_ERR(cs35l41->regmap);
  67                dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret);
  68                return ret;
  69        }
  70
  71        return cs35l41_probe(cs35l41, pdata);
  72}
  73
  74static int cs35l41_i2c_remove(struct i2c_client *client)
  75{
  76        struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
  77
  78        cs35l41_remove(cs35l41);
  79
  80        return 0;
  81}
  82
  83#ifdef CONFIG_OF
  84static const struct of_device_id cs35l41_of_match[] = {
  85        { .compatible = "cirrus,cs35l40" },
  86        { .compatible = "cirrus,cs35l41" },
  87        {},
  88};
  89MODULE_DEVICE_TABLE(of, cs35l41_of_match);
  90#endif
  91
  92#ifdef CONFIG_ACPI
  93static const struct acpi_device_id cs35l41_acpi_match[] = {
  94        { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
  95        {},
  96};
  97MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
  98#endif
  99
 100static struct i2c_driver cs35l41_i2c_driver = {
 101        .driver = {
 102                .name           = "cs35l41",
 103                .of_match_table = of_match_ptr(cs35l41_of_match),
 104                .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
 105        },
 106        .id_table       = cs35l41_id_i2c,
 107        .probe          = cs35l41_i2c_probe,
 108        .remove         = cs35l41_i2c_remove,
 109};
 110
 111module_i2c_driver(cs35l41_i2c_driver);
 112
 113MODULE_DESCRIPTION("I2C CS35L41 driver");
 114MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
 115MODULE_LICENSE("GPL");
 116