Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[linux-2.6-microblaze.git] / sound / soc / codecs / adau1761-spi.c
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");