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