1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for ADAU1361/ADAU1461/ADAU1761/ADAU1961 codec
4 *
5 * Copyright 2014 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
7 */
8
9 #include <linux/mod_devicetable.h>
10 #include <linux/module.h>
11 #include <linux/regmap.h>
12 #include <linux/spi/spi.h>
13 #include <sound/soc.h>
14
15 #include "adau1761.h"
16
17 static void adau1761_spi_switch_mode(struct device *dev)
18 {
19 struct spi_device *spi = to_spi_device(dev);
20
21 /*
22 * To get the device into SPI mode CLATCH has to be pulled low three
23 * times. Do this by issuing three dummy reads.
24 */
25 spi_w8r8(spi, 0x00);
26 spi_w8r8(spi, 0x00);
27 spi_w8r8(spi, 0x00);
28 }
29
30 static int adau1761_spi_probe(struct spi_device *spi)
31 {
32 const struct spi_device_id *id = spi_get_device_id(spi);
33 struct regmap_config config;
34
35 if (!id)
36 return -EINVAL;
37
38 config = adau1761_regmap_config;
39 config.val_bits = 8;
40 config.reg_bits = 24;
41 config.read_flag_mask = 0x1;
42
43 return adau1761_probe(&spi->dev,
44 devm_regmap_init_spi(spi, &config),
45 id->driver_data, adau1761_spi_switch_mode);
46 }
47
48 static void adau1761_spi_remove(struct spi_device *spi)
49 {
50 adau17x1_remove(&spi->dev);
51 }
52
53 static const struct spi_device_id adau1761_spi_id[] = {
54 { "adau1361", ADAU1361 },
55 { "adau1461", ADAU1761 },
56 { "adau1761", ADAU1761 },
57 { "adau1961", ADAU1361 },
58 { }
59 };
60 MODULE_DEVICE_TABLE(spi, adau1761_spi_id);
61
62 #if defined(CONFIG_OF)
63 static const struct of_device_id adau1761_spi_dt_ids[] = {
64 { .compatible = "adi,adau1361", },
65 { .compatible = "adi,adau1461", },
66 { .compatible = "adi,adau1761", },
67 { .compatible = "adi,adau1961", },
68 { },
69 };
70 MODULE_DEVICE_TABLE(of, adau1761_spi_dt_ids);
71 #endif
72
73 static struct spi_driver adau1761_spi_driver = {
74 .driver = {
75 .name = "adau1761",
76 .of_match_table = of_match_ptr(adau1761_spi_dt_ids),
77 },
78 .probe = adau1761_spi_probe,
79 .remove = adau1761_spi_remove,
80 .id_table = adau1761_spi_id,
81 };
82 module_spi_driver(adau1761_spi_driver);
83
84 MODULE_DESCRIPTION("ASoC ADAU1361/ADAU1461/ADAU1761/ADAU1961 CODEC SPI driver");
85 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
86 MODULE_LICENSE("GPL");
87
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.