soc/codecs/cs35l41-i2c.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 //
0003 // cs35l41-i2c.c -- CS35l41 I2C driver
0004 //
0005 // Copyright 2017-2021 Cirrus Logic, Inc.
0006 //
0007 // Author: David Rhodes <david.rhodes@cirrus.com>
0008
0009 #include <linux/acpi.h>
0010 #include <linux/delay.h>
0011 #include <linux/i2c.h>
0012 #include <linux/init.h>
0013 #include <linux/kernel.h>
0014 #include <linux/module.h>
0015 #include <linux/moduleparam.h>
0016 #include <linux/of_device.h>
0017 #include <linux/platform_device.h>
0018 #include <linux/slab.h>
0019
0020 #include "cs35l41.h"
0021
0022 static const struct i2c_device_id cs35l41_id_i2c[] = {
0023     { "cs35l40", 0 },
0024     { "cs35l41", 0 },
0025     { "cs35l51", 0 },
0026     { "cs35l53", 0 },
0027     {}
0028 };
0029
0030 MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
0031
0032 static int cs35l41_i2c_probe(struct i2c_client *client)
0033 {
0034     struct cs35l41_private *cs35l41;
0035     struct device *dev = &client->dev;
0036     struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(dev);
0037     const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
0038     int ret;
0039
0040     cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
0041
0042     if (!cs35l41)
0043         return -ENOMEM;
0044
0045     cs35l41->dev = dev;
0046     cs35l41->irq = client->irq;
0047
0048     i2c_set_clientdata(client, cs35l41);
0049     cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
0050     if (IS_ERR(cs35l41->regmap)) {
0051         ret = PTR_ERR(cs35l41->regmap);
0052         dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret);
0053         return ret;
0054     }
0055
0056     return cs35l41_probe(cs35l41, hw_cfg);
0057 }
0058
0059 static int cs35l41_i2c_remove(struct i2c_client *client)
0060 {
0061     struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
0062
0063     cs35l41_remove(cs35l41);
0064
0065     return 0;
0066 }
0067
0068 #ifdef CONFIG_OF
0069 static const struct of_device_id cs35l41_of_match[] = {
0070     { .compatible = "cirrus,cs35l40" },
0071     { .compatible = "cirrus,cs35l41" },
0072     {},
0073 };
0074 MODULE_DEVICE_TABLE(of, cs35l41_of_match);
0075 #endif
0076
0077 #ifdef CONFIG_ACPI
0078 static const struct acpi_device_id cs35l41_acpi_match[] = {
0079     { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
0080     {},
0081 };
0082 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
0083 #endif
0084
0085 static struct i2c_driver cs35l41_i2c_driver = {
0086     .driver = {
0087         .name       = "cs35l41",
0088         .pm     = &cs35l41_pm_ops,
0089         .of_match_table = of_match_ptr(cs35l41_of_match),
0090         .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
0091     },
0092     .id_table   = cs35l41_id_i2c,
0093     .probe_new  = cs35l41_i2c_probe,
0094     .remove     = cs35l41_i2c_remove,
0095 };
0096
0097 module_i2c_driver(cs35l41_i2c_driver);
0098
0099 MODULE_DESCRIPTION("I2C CS35L41 driver");
0100 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
0101 MODULE_LICENSE("GPL");